PHP (English Wikipedia)

Popov, Nikita (13 July 2020). ""What's new in PHP 8.0?" Nikita Popov". PHP fwdays. Archived from the original on 2021-12-11. Retrieved 4 October 2020.

github.com (Global: 383^rd place; English: 320^th place)

"Helicopter: Port of node-ar-drone which allows user to control a Parrot AR Drone over PHP". JoliCode. 11 January 2019. Retrieved 23 February 2019.
"Merge branch 'ZendEngine3'". github.com. 2014-12-05. Retrieved 2014-12-05.
"Basic Coding Standard". PHP Framework Interoperability Group. Retrieved 2016-01-03.
"Announcement on GitHub removing HPHPc support". GitHub. Retrieved 2013-05-24.

gnu.org (Global: 1,475^th place; English: 1,188^th place)

"GPL-Incompatible, Free Software Licenses". Various Licenses and Comments about Them. Free Software Foundation. Retrieved 2011-01-03.

gophp5.org (Global: low place; English: low place)

"GoPHP5". Archived from the original on 2011-07-17.
"PHP projects join forces to Go PHP 5" (PDF). GoPHP5 Press Release. Archived from the original (PDF) on 2019-08-04. Retrieved 2008-02-23.
"GoPHP5". GoPHP5. Archived from the original on 2011-04-27. Retrieved 2008-02-22.

groups.google.com (Global: 1,518^th place; English: 1,072^nd place)

Lerdorf, Rasmus (June 8, 1995). "Announce: Personal Home Page Tools (PHP Tools)". Retrieved 7 June 2011.
"Announce: Personal Home Page Tools (PHP Tools)". Retrieved 3 November 2022.
Lerdorf, Rasmus (1995-06-08). "Announce: Personal Home Page Tools (PHP Tools)". Newsgroup: comp.infosystems.www.authoring.cgi. Retrieved 2006-09-17.

hardened-php.net (Global: low place; English: low place)

"Hardened-PHP Project". 2008-08-15. Archived from the original on 2019-02-24. Retrieved 2019-08-22.

hhvm.com (Global: low place; English: low place)

"We are the 98.5% (and the 16%) « HipHop Virtual Machine". hhvm.com. December 2013. Retrieved 2014-02-23.

howtogeek.com (Global: 6,527^th place; English: 4,344^th place)

Walker, James (2021-12-13). "What the New PHP Foundation Means for PHP's Future". How-To Geek. Retrieved 2023-11-26.

i-programmer.info (Global: low place; English: low place)

"PHP 8.1 Released With Enums, Read-Only Properties and Fibers". www.i-programmer.info. Retrieved 2023-12-05.

ibm.com (Global: 1,131^st place; English: 850^th place)

www-128.ibm.com

"IBM — United States". Retrieved 16 December 2014.
"Five common PHP database problems". ibm.com. 2006-08-01. Retrieved 2013-06-13.

redbooks.ibm.com

"IBM Redbooks — Developing PHP Applications for IBM Data Servers". redbooks.ibm.com. Retrieved 16 December 2014.

ibm.com

"Five simple ways to tune your LAMP application". IBM. 2011-01-25.

infoworld.com (Global: 3,696^th place; English: 2,428^th place)

Krill, Paul (18 November 2013). "Believe the hype: PHP founder backs Facebook's HipHop technology". InfoWorld. Retrieved 13 October 2022.
Krill, Paul (2014-10-31). "PHP 7 moves full speed ahead". InfoWorld. Recent versions of PHP have been part of the 5.x release series, but there will be no PHP 6. "We're going to skip [version] 6, because years ago, we had plans for a 6, but those plans were very different from what we're doing now," Gutmans said. Going right to version 7 avoids confusion.
Krill, Paul (2017-09-20). "Forget PHP! Facebook's HHVM engine switches to Hack instead". InfoWorld. Retrieved 2019-02-06.
Krill, Paul (19 October 2005). "PHP catching on at enterprises, vying with Java". InfoWorld. Archived from the original on 13 July 2014.

internetnews.com (Global: low place; English: 8,800^th place)

Kerner, Sean Michael (2008-02-01). "PHP 4 is Dead—Long Live PHP 5". InternetNews. Archived from the original on 2018-08-06. Retrieved 2018-12-16.

ipsec.pl (Global: low place; English: low place)

Krawczyk, Pawel (2013). "Most common attacks on web applications". IPSec.pl. Archived from the original on 2015-04-15. Retrieved 2015-04-15.
Krawczyk, Pawel (2013). "So what are the "most critical" application flaws? On new OWASP Top 10". IPSec.pl. Retrieved 2015-04-15.

iu.edu (Global: 3,316^th place; English: 1,982^nd place)

webmaster.iu.edu

"PHP Server-Side Scripting Language". Indiana University. 2007-04-04. Archived from the original on 2016-01-21. Retrieved 2008-02-25.

jetbrains.com (Global: 8,974^th place; English: 7,712^th place)

blog.jetbrains.com

"The New Life of PHP – The PHP Foundation | The PhpStorm Blog". The JetBrains Blog. 22 November 2021. Retrieved 2022-06-16.

joomla.org (Global: low place; English: low place)

Kempkens, Alex. "Joomla! — Content Management System to build websites & apps".

kinsta.com (Global: low place; English: low place)

Daniele, Carlo (25 May 2020). "What's New in PHP 8 (Features, Improvements, and the JIT Compiler)". Kinsta. Retrieved 24 December 2020.
"The Definitive PHP 5.6, 7.0, 7.1, 7.2 & 7.3 Benchmarks (2019)". 2019-01-14. Retrieved 2019-04-19.

laravel-news.com (Global: low place; English: low place)

Redmond, Paul (15 July 2020). "Match Expression is Coming to PHP 8". Laravel News. Retrieved 4 October 2020.
Barnes, Eric (27 November 2020). "PHP 8 is now Released!". Laravel News. Retrieved 24 December 2020.

linux-tutorial.info (Global: low place; English: low place)

"How do computer languages work?". Archived from the original on 2011-07-16. Retrieved 2009-11-04.

lwn.net (Global: 4,423^rd place; English: 2,925^th place)

Corbet, Jonathan (24 March 2010). "Resetting PHP 6". There have been books on the shelves purporting to cover PHP 6 since at least 2008. But, in March 2010, the PHP 6 release is not out – in fact, it is not even close to out. Recent events suggest that PHP 6 will not be released before 2011 – if, indeed, it is released at all.

mail-archive.com (Global: 8,986^th place; English: 8,081^st place)

"Re: [PHP-DEV] [VOTE] [RFC] Name of Next Release of PHP (again)". 2014-07-30. Retrieved 2014-07-30.

marc.info (Global: low place; English: 8,542^nd place)

Andrei Zmievski (2005-08-10). "PHP Unicode support design document" (Mailing list). Retrieved 2014-02-09.

mediawiki.org (Global: low place; English: 9,522^nd place)

"Manual:Installation requirements#PHP". MediaWiki. 2010-01-25. Retrieved 2010-02-26. PHP is the programming language in which MediaWiki is written [...]

mjtsai.com (Global: low place; English: low place)

"PHP 5 Object References". mjtsai.com. Retrieved 2008-03-16.

moodle.org (Global: low place; English: low place)

docs.moodle.org

"About". Moodle.org. Archived from the original on 2010-01-11. Retrieved 2009-12-20.

mysqlperformanceblog.com (Global: low place; English: low place)

"Integers in PHP, running with scissors, and portability". MySQL Performance Blog. March 27, 2007. Retrieved 2007-03-28.

netcraft.com (Global: low place; English: low place)

news.netcraft.com

Ide, Andy (2013-01-31). "PHP just grows & grows". Retrieved 2013-04-01.

nibblesec.org (Global: low place; English: low place)

blog.nibblesec.org

Nibble Security. "TYPO3-SA-2010-020, TYPO3-SA-2010-022 EXPLAINED".

nist.gov (Global: 355^th place; English: 454^th place)

nvd.nist.gov

"National Vulnerability Database (NVD) Search Vulnerabilities Statistics". Retrieved 2019-11-22.

onlamp.com (Global: low place; English: low place)

"Embedding PHP in HTML". O'Reilly. 2001-05-03. Archived from the original on 2008-02-19. Retrieved 2008-02-25.
Trachtenberg, Adam (2004-07-15). "Why PHP 5 Rocks!". O'Reilly. Archived from the original on 2016-03-31. Retrieved 2008-02-22.
Darryl Patterson (5 August 2004). "Simplify Business Logic with PHP DataObjects — O'Reilly Media". ibm.com. Archived from the original on 16 December 2014. Retrieved 16 December 2014.

pagely.com (Global: low place; English: low place)

"Pagely PHP Long Term Support Page". Pagely. Retrieved 2024-09-14.

philsturgeon.uk (Global: low place; English: low place)

"The Neverending Muppet Debate of PHP 6 v PHP 7". Archived from the original on 2015-11-19. Retrieved 2015-11-19.

php.earth (Global: low place; English: low place)

docs.php.earth

"ElePHPant". PHP.earth. Retrieved 2024-02-13.

php.net (Global: 4,194^th place; English: 3,676^th place)

wiki.php.net

"PHP: Release Process". 2011-06-20. Retrieved 2013-10-06.
"RFC: Name of Next Release of PHP". php.net. 2014-07-07. Retrieved 2014-07-15.
"PHP: rfc:phpng". php.net. Retrieved 16 December 2014.
"PHP: phpng". php.net. Retrieved 2014-07-15.
"PHP RFC: Exceptions in the engine (for PHP 7)". php.net. Retrieved 2015-05-21.
"PHP RFC: Uniform Variable Syntax". php.net. 2014-05-31. Retrieved 2014-07-30.
"PHP RFC: Fix "foreach" behavior". php.net. Retrieved 2015-05-21.
"PHP RFC: Constructor behaviour of internal classes". php.net. Retrieved 2015-05-21.
"PHP RFC: Removal of dead or not yet PHP7 ported SAPIs and extensions". php.net. Retrieved 2015-05-21.
"PHP RFC: Fix list() behavior inconsistency". php.net. Retrieved 2015-05-21.
"PHP RFC: Remove alternative PHP tags". php.net. Retrieved 2015-05-21.
"PHP RFC: Make defining multiple default cases in a switch a syntax error". php.net. Retrieved 2015-05-21.
"PHP RFC: Remove hex support in numeric strings". php.net. Retrieved 2015-05-21.
"PHP RFC: Integer Semantics". php.net. Retrieved 2015-05-21. Making NaN and Infinity always become zero when cast to integer means more cross-platform consistency, and is also less surprising than what is currently produces
"PHP RFC: ZPP Failure on Overflow". php.net. Retrieved 2015-05-21.
"RFC: Return Types". php.net. 2015-01-27. Retrieved 2015-01-28.
"RFC: Scalar Type Declarations". php.net. 2015-03-16. Retrieved 2015-03-17.
"PHP: rfc:jit". wiki.php.net. Retrieved 2019-04-05.
"PHP RFC: throw expression". wiki.php.net. Retrieved 14 August 2020.
"PHP RFC: Nullsafe operator". wiki.php.net. Retrieved 14 August 2020.
"PHP: rfc:size_t_and_int64_next". php.net. Retrieved 16 December 2014.
"PHP: rfc:abstract_syntax_tree". php.net. Retrieved 16 December 2014.
"PHP: rfc:closure_apply". php.net. Retrieved 16 December 2014.
"PHP: rfc:integer_semantics". php.net. Retrieved 16 December 2014.
"PHP: rfc:isset_ternary". php.net. Retrieved 16 December 2014.
"RFC: Unicode Codepoint Escape Syntax". 2014-11-24. Retrieved 2014-12-19.
"Combined Comparison (Spaceship) Operator". php.net. Retrieved 2015-05-21.
"PHP RFC: Generator Delegation". php.net. Retrieved 2015-05-21.
"PHP RFC: Anonymous Classes". php.net. Retrieved 2015-05-21.
"PHP RFC: Easy User-land CSPRNG". php.net. Retrieved 2015-05-21.
"PHP RFC: Group Use Declarations". php.net. Retrieved 2015-05-21.
"PHP: rfc:iterable". php.net. 2016-06-10. Retrieved 2023-06-30.
"PHP: rfc:nullable_types". php.net. 2014-04-10. Retrieved 2023-06-30.
"PHP: rfc:void_return_type". php.net. 2015-11-09. Retrieved 2015-11-14.
"PHP: rfc:class_constant_visibility". php.net. 2015-10-27. Retrieved 2015-12-08.
"PHP: rfc:short_list_syntax". php.net. 2016-04-07. Retrieved 2023-06-30.
"PHP: rfc:multiple-catch". php.net. 2016-03-06. Retrieved 2023-06-30.
"PHP: rfc:object-typehint". wiki.php.net.
"PHP: rfc:libsodium". wiki.php.net.
"PHP: rfc:allow-abstract-function-override". wiki.php.net.
"PHP: rfc:parameter-no-type-variance". wiki.php.net.
"PHP: todo:php73". wiki.php.net.
"PHP: rfc:flexible_heredoc_nowdoc_syntaxes". wiki.php.net.
"PHP: rfc:list_reference_assignment". wiki.php.net.
"PHP: rfc:pcre2-migration". wiki.php.net.
"PHP: rfc:typed_properties_v2". wiki.php.net. Retrieved 2019-04-04.
"PHP: rfc:preload". wiki.php.net. Retrieved 2019-04-04.
"PHP: rfc:null_coalesce_equal_operator". wiki.php.net. Retrieved 2019-04-04.
"PHP: rfc:improve-openssl-random-pseudo-bytes". wiki.php.net. Retrieved 2019-04-04.
"PHP: rfc:weakrefs". wiki.php.net. Retrieved 2019-04-05.
"PHP: rfc:ffi". wiki.php.net. Retrieved 2019-04-05.
"PHP: rfc:permanent_hash_ext". wiki.php.net. Retrieved 2019-04-05.
"PHP: rfc:password_registry". wiki.php.net. Retrieved 2019-04-05.
"PHP: rfc:mb_str_split". wiki.php.net. Retrieved 2019-04-05.
"PHP: rfc:reference_reflection". wiki.php.net. Retrieved 2019-04-05.
"PHP: rfc:deprecate-and-remove-ext-wddx". wiki.php.net. Retrieved 2019-04-05.
"PHP: rfc:custom_object_serialization". wiki.php.net. Retrieved 2019-04-05.
"PHP: rfc:negative_array_index". wiki.php.net. Retrieved 2019-04-05.
"PHP RFC: Validation for abstract trait methods". wiki.php.net. Retrieved 14 August 2020.
"PHP RFC: Saner string to number comparisons". wiki.php.net. Retrieved 14 August 2020.
"PHP RFC: Saner numeric strings". wiki.php.net. Retrieved 14 August 2020.
"PHP RFC: Stricter type checks for arithmetic/bitwise operators". wiki.php.net. Retrieved 14 August 2020.
"PHP RFC: Reclassifying engine warnings". wiki.php.net. Retrieved 14 August 2020.
"PHP: rfc:consistent_type_errors". wiki.php.net. Retrieved 2019-04-05.
"PHP: rfc:lsp_errors". wiki.php.net. Retrieved 2019-05-26.
"PHP RFC: Locale-independent float to string cast". wiki.php.net. Retrieved 14 August 2020.
"PHP RFC: Variable Syntax Tweaks". wiki.php.net. Retrieved 14 August 2020.
"PHP RFC: Attributes V2". wiki.php.net. Retrieved 14 August 2020.
"PHP RFC: Attribute Amendments". wiki.php.net. Retrieved 14 August 2020.
"PHP RFC: Shorter Attribute Syntax". wiki.php.net. Retrieved 2020-06-20.
"PHP RFC: Shorter Attribute Syntax Change". wiki.php.net. Retrieved 14 August 2020.
"PHP RFC: Named Arguments". wiki.php.net. Retrieved 14 August 2020.
"PHP RFC: Match expression v2". wiki.php.net. Retrieved 14 August 2020.
"PHP RFC: Constructor Property Promotion". wiki.php.net. Retrieved 14 August 2020.
"PHP RFC: Union Types 2.0". wiki.php.net. Retrieved 14 August 2020.
"PHP RFC: Mixed Type v2". wiki.php.net. Retrieved 14 August 2020.
"PHP RFC: Static return type". wiki.php.net. Retrieved 14 August 2020.
"PHP RFC: non-capturing catches". wiki.php.net. Retrieved 14 August 2020.
Andre, Tyson. "PHP RFC: Always available JSON extension". PHP. Retrieved 25 October 2020.
"PHP: todo:php81". wiki.php.net. Retrieved 2022-06-16.
"PHP RFC: Explicit octal integer literal notation". wiki.php.net. Retrieved 2020-11-25.
"PHP RFC: Enumerations". wiki.php.net. Retrieved 2021-03-25.
"PHP: rfc:readonly_properties_v2". wiki.php.net. Retrieved 2021-11-26.
"PHP: rfc:first_class_callable_syntax". wiki.php.net. Retrieved 2021-11-26.
"PHP: rfc:new_in_initializers". wiki.php.net. Retrieved 2021-11-26.
"PHP: rfc:pure-intersection-types". wiki.php.net. Retrieved 2021-11-26.
"PHP: rfc:noreturn_type". wiki.php.net. Retrieved 2021-11-26.
"PHP: rfc:final_class_const". wiki.php.net. Retrieved 2021-11-26.
"PHP: rfc:fibers". wiki.php.net. Retrieved 2021-11-26.
"PHP: todo:php82". wiki.php.net. Retrieved 2022-06-16.
"PHP: rfc:readonly_classes". wiki.php.net. Retrieved 2022-06-16.
"PHP: rfc:null-false-standalone-types". wiki.php.net. Retrieved 2022-06-16.
"PHP: rfc:true-type". wiki.php.net. Retrieved 2022-06-16.
"PHP: rfc:strtolower-ascii". wiki.php.net. Retrieved 2022-06-16.
"PHP: rfc:dnf_types". wiki.php.net. Retrieved 2023-02-07.
"PHP: rfc:constants_in_traits". wiki.php.net. Retrieved 2023-02-07.
"PHP: rfc:typed_class_constants". wiki.php.net. Retrieved 2023-12-17.
"PHP: rfc:dynamic_class_constant_fetch". wiki.php.net. Retrieved 2023-12-17.
"PHP: rfc:marking_overriden_methods". wiki.php.net. Retrieved 2023-12-17.
"PHP: rfc:readonly_amendments". wiki.php.net. Retrieved 2023-12-17.
"PHP: rfc:json_validate". wiki.php.net. Retrieved 2023-12-17.
"PHP: rfc:randomizer_additions". wiki.php.net. Retrieved 2023-12-17.
"PHP: todo: php84". php.net. 26 March 2024. Retrieved 26 March 2024.
"PHP: todo: php85". php.net. 16 April 2024. Retrieved 16 April 2025.
"PHP: rfc:pipe-operator-v3". wiki.php.net. Retrieved 2025-08-06.
"PHP: RFC:release_cycle_update".
"PHP: rfc:shortags". php.net. 2008-04-03. Retrieved 2014-05-08.
Christian Seiler; Dmitry Stogov (2008-07-01). "Request for Comments: Lambda functions and closures". php.net. Retrieved 2014-07-07.
"PHP: rfc:taint". wiki.php.net.

php.net

"Version 8.4.13". 25 September 2025. Retrieved 3 October 2025.
"PHP: Preface – Manual".
"PHP: Hypertext Preprocessor". Retrieved 12 February 2020.
"History of PHP and related projects". The PHP Group. Retrieved 25 February 2008.
"History of PHP". php.net.
PHP Manual: Preface, PHP.
"Introduction: What can PHP do?". PHP Manual. Archived from the original on 16 February 2009. Retrieved 5 March 2009.
"PHP: Unsupported Branches".
"php.net 2007 news archive". The PHP Group. 2007-07-13. Retrieved 2008-02-22.
"Types: Strings (PHP Manual)". PHP.net. Retrieved 2013-09-22.
"Details of the String Type (PHP Manual)". PHP.net. Retrieved 2021-09-22.
"Static Keyword". The PHP Group. Retrieved 2008-03-25.
"PHP: Supported Versions".
"PHP 8 Released". PHP. Retrieved 27 November 2020.
"PHP 8 ChangeLog". PHP.net. Retrieved 2024-01-05.
"PHP: PHP 8.1.0 Release Announcement". PHP.net. Retrieved 2024-01-05.
"PHP 8 ChangeLog". PHP.net. Retrieved 2024-01-05.
"PHP: PHP 8.2.0 Release Announcement". PHP.net. Retrieved 2024-01-05.
"Unsupported Branches". php.net. Retrieved 2019-07-31.
"PHP: PHP 4 ChangeLog". The PHP Group. 2008-01-03. Retrieved 2008-02-22.
"PHP 4.1.0 Release Announcement". Retrieved 25 October 2020.
"PHP 4.2.0 Release Announcement". Retrieved 25 October 2020.
"PHP 4.3.0 Release Announcement". Retrieved 25 October 2020.
"Using PHP from the command line". PHP Manual. The PHP Group. Retrieved 2009-09-11.
"PHP 4.4.0 Release Announcement". Retrieved 25 October 2020.
"PHP 4.4.0 Release Announcement". PHP Manual. The PHP Group. Retrieved 2013-11-24.
"PHP: PHP 5 ChangeLog". The PHP Group. 2007-11-08. Retrieved 2008-02-22.
"PHP 5.1.0 Release Announcement". Retrieved 25 October 2020.
"PHP manual: PDO". The PHP Group. 2011-11-15. Retrieved 2011-11-15.
"PHP 5.2.0 Release Announcement". Retrieved 25 October 2020.
"PHP 5.3.0 Release Announcement". Retrieved 25 October 2020.
"PHP 5.4.0 Release Announcement". Retrieved 25 October 2020.
"Built-in web server". Retrieved March 26, 2012.
"PHP 5.5.0 Release Announcement". Retrieved 25 October 2020.
"Supported Versions". php.net. Retrieved 2017-12-13.
"PHP 5.5.0 changes". php.net. Archived from the original on 2015-03-01. Retrieved 2015-03-03.
"PHP 5.6.0 Release Announcement". Retrieved 25 October 2020.
"Migrating from PHP 5.5.x to PHP 5.6.x". php.net. Retrieved 2014-03-24.
"News Archive – 2018: PHP 7.2.9 Released". php.net. 2018-08-16. Retrieved 2018-08-16.
"PHP: hrtime – Manual". php.net.
"PHP 7.4.0 Released!". php.net. Retrieved 2019-11-28.
"PHP: Supported Versions". php.net. Retrieved 2023-11-26.
"PHP 8.3.0 Released!". php.net. 23 November 2023. Retrieved 24 November 2023.
"PHP: ElePHPant". 4 Oct 2014. Retrieved 4 Oct 2014.
"PHP: ElePHPant". www.php.net.
"tags – Manual". php.net. Retrieved 2014-02-17.
"PHP: Basic syntax". The PHP Group. Retrieved 2008-02-22.
"echo – Manual". php.net. Retrieved 2014-02-17.
"Description of core php.ini directives – Manual". php.net. 2002-03-17. Retrieved 2014-02-17.
"Your first PHP-enabled page". The PHP Group. Retrieved 2008-02-25.
"Variables". The PHP Group. Retrieved 2008-03-16.
"Instruction separation". The PHP Group. Retrieved 2008-03-16.
"Comments". The PHP Group. Retrieved 2008-03-16.
"Integers". PHP Manual. The PHP Group. Retrieved 2025-05-26.
"Types". The PHP Group. Retrieved 2008-03-16.
"Strings". The PHP Group. Retrieved 2008-03-21.
"SPL – StandardPHPLibrary". PHP.net. March 16, 2009. Retrieved 2009-03-16.
"User-defined functions (PHP manual)". php.net. 2014-07-04. Retrieved 2014-07-07.
"Variable functions (PHP manual)". php.net. 2014-07-04. Retrieved 2014-07-07.
"create_function() (PHP manual)". php.net. 2022-04-06. Retrieved 2022-05-04.
"Anonymous functions (PHP manual)". php.net. 2014-07-04. Retrieved 2014-07-07.
"Arrow Functions (PHP manual)". php.net. Retrieved 2021-01-25.
"Classes and Objects (PHP 5)". The PHP Group. Retrieved 2008-03-16.
"Object cloning". The PHP Group. Retrieved 2008-03-16.
"Alternative PHP Cache". PHP.net. Archived from the original on 2013-11-15. Retrieved 2013-09-21.
"The PHP License, version 3.01". Retrieved 2010-05-20.
"PHP: Function and Method listing – Manual". The PHP Group. Retrieved 2015-01-14.
"Introduction – Manual". php.net. 2013-06-07. Retrieved 2013-06-13.
"PHP Credits". Retrieved 2018-12-16.
"General Installation Considerations". php.net. Retrieved 2013-09-22.
"News Archive: PHP 5.3.3 Released!". php.net. 2010-07-22.
"FastCGI Process Manager (FPM)". php.net. Retrieved 2013-09-22.
"Command line usage: Introduction". php.net. Archived from the original on 2021-03-21. Retrieved 2013-09-22.
"Command line usage: Differences to other SAPIs". php.net. Retrieved 2013-09-22.
"General Installation Considerations". php.net. Retrieved 2013-09-22.
"PHP: Apache 2.x on Microsoft Windows". php.net. Archived from the original on 2013-09-26. Retrieved 2013-09-22.
"Command line usage: Introduction". php.net. Archived from the original on 2021-03-21. Retrieved 2013-09-22.
"Runtime configuration: Table of contents". php.net. Retrieved 2013-09-22.
"php.ini directives: List of php.ini directives". php.net. Retrieved 2013-09-22.
"Runtime configuration: The configuration file". PHP.net. Retrieved 2013-09-22.
"php.ini directives: List of php.ini sections". PHP.net. Retrieved 2013-09-22.
"Runtime configuration: Where a configuration setting may be set". PHP.net. Retrieved 2013-09-22.
"PHP Manual Image Processing and GD;". php.net. Retrieved 2011-04-09.
"PHP at the core: Extension structure". PHP.net. Archived from the original on 2013-09-26. Retrieved 2013-09-22.
"PHP at the core: The "counter" Extension – A Continuing Example". PHP.net. Archived from the original on 2013-09-26. Retrieved 2013-09-22.
"pthreads: Introduction (PHP Manual)". PHP.net. Retrieved 2013-09-22.
"Security: Using Register Globals". PHP Manual. PHP.net. Archived from the original on 2013-09-27. Retrieved 2013-09-22.
"Magic Quotes". PHP Manual. PHP.net. Archived from the original on 2014-02-08. Retrieved 2014-01-17.
"'engine' configuration directive". PHP: Runtime Configuration. PHP.net. Retrieved 2014-02-13.
"'enable_dl' configuration directive". PHP: Runtime Configuration. PHP.net. Retrieved 2014-02-13.
"PHP function reference: dl()". PHP.net. Retrieved 2013-09-22.
"PHP: Rand – Manual".
"PHP: Mt_rand - Manual".
"PHP: Random_int – Manual".

news.php.net

"php.internals: Re: Function name consistency". news.php.net. 2013-12-28. Retrieved 2014-02-09.
Rasmus Lerdorf (Dec 16, 2013). "Re: Flexible function naming". Newsgroup: php.internals. Retrieved December 26, 2013.
"PHP 5.5 or 6.0". Retrieved 2014-02-09.
Rasmus Lerdorf (2010-03-11). "PHP 6" (Mailing list). Retrieved 2014-02-07.
"phpng: Refactored PHP Engine with Big Performance Improvement". news.php.net.
"[VOTE] Integrating Zend Optimizer+ into the PHP distribution". news.php.net. Retrieved 2013-03-08.

windows.php.net

"PHP for Windows: Binaries and sources releases (5.3)". php.net. Retrieved 2013-10-29.
"PHP for Windows: Binaries and sources releases (5.4)". php.net. Retrieved 2013-10-29.
"PHP for Windows: Binaries and sources releases (5.5)". php.net. Retrieved 2013-10-29.

news-web.php.net

"PHP 4.0.0 Released". Retrieved 25 October 2020.
"PHP 5.0.0 Released!". Retrieved 25 October 2020.

secure.php.net

"PHP: Function arguments – Manual".

museum.php.net

"PHP: Release Archives (museum)".

talks.php.net

Lerdorf, Rasmus (2007). "Slide 3". slides for 'PHP on Hormones' talk. The PHP Group. Retrieved 2009-06-22.

il.php.net

"PHP – Acronym Meaning Vote". PHP.net. Archived from the original on August 15, 2000.

lxr.php.net

"Cross Reference: /PHP_5_4/ext/standard/". php.net. Archived from the original on 16 March 2012. Retrieved 16 December 2014.

gtk.php.net

"Installing PHP-GTK 2". php.net. Archived from the original on 2013-12-12. Retrieved 2013-09-22.

bugs.php.net

"Request #46919: Multithreading". PHP.net. Retrieved 2013-09-22.

pecl.php.net

"PECL :: Package :: pthreads". pecl.php.net. Retrieved 2014-02-09.

php.watch (Global: low place; English: low place)

"PHP 8.0: Match Expressions". PHP Watch. Retrieved 4 October 2020.

phparch.com (Global: low place; English: low place)

"php[architect] Magazine – The Journal for PHP Programmers". www.phparch.com.

phpclasses.org (Global: low place; English: low place)

"PHP security exploit with GIF images". PHP Classes blog. 2007-06-20. Retrieved 2013-09-22.

phpinternalsbook.com (Global: low place; English: low place)

Julien Pauli; Nikita Popov; Anthony Ferrara. "PHP Internals Book". PHP Internals Book. Archived from the original on 2025-01-21. Retrieved 2025-01-21.

raz0r.name (Global: low place; English: low place)

Raz0r (25 January 2013). "Simple Machines Forum <= 2.0.3 Admin Password Reset". Raz0R.name — Web Application Security.{{cite news}}: CS1 maint: numeric names: authors list (link)

researchgate.net (Global: 120^th place; English: 125^th place)

Alshetwi, A.B.; Rahmat, R. A. A. O.; Borhan, M. N.; Ismael, S.; Ali, A.; Irtema, H. I. M.; Alfakhria, A. Y. (2018). "Web-Based Expert System for Optimizing of Traffic Road in Developing Countries". Retrieved 13 Feb 2024.

silverstripe.org (Global: low place; English: low place)

doc.silverstripe.org

"Server requirements of SilverStripe". Archived from the original on 28 November 2014. Retrieved 13 October 2014. SilverStripe requires PHP 5.3.2+

slideshare.net (Global: 2,161^st place; English: 2,535^th place)

Andrei Zmievski (2011-04-22). "The Good, the Bad, and the Ugly: What Happened to Unicode and PHP 6". Retrieved 2014-02-09.

snuffleupagus.readthedocs.io (Global: low place; English: low place)

"Snuffleupagus Documentation".

sovereigntechfund.de (Global: low place; English: low place)

"PHP". Sovereign Tech Fund. Retrieved 2024-05-26.

stackoverflow.com (Global: 4,643^rd place; English: 2,973^rd place)

"Extending PHP with C++?". Stack Overflow. Retrieved 2013-09-22.
"How can I use C++ code to interact with PHP?". Stack Overflow. Retrieved 2013-09-22.

stitcher.io (Global: low place; English: low place)

Brent. "What's new in PHP 8". Stitcher. Retrieved 22 September 2020.
Brent. "PHP 8: JIT performance in real-life web applications". Stitcher.io. Retrieved 4 October 2020.
Roose, Brent. "PHP 8: Constructor property promotion". Retrieved 30 April 2024.

sun.com (Global: 5,060^th place; English: 4,600^th place)

java.sun.com

"JavaServer Pages Technology — JavaServer Pages Comparing Methods for Server-Side Dynamic Content White Paper". Sun Microsystems. Retrieved 2008-02-25.

thephp.foundation (Global: low place; English: low place)

"The PHP Foundation: Impact and Transparency Report 2022". thephp.foundation. Retrieved 2023-11-27.
Pronskiy, Roman (2024-02-26). "The PHP Foundation: Impact and Transparency Report 2023". The PHP Foundation. Retrieved 2024-04-01.
Pronskiy, Roman (2025-03-31). "The PHP Foundation: Impact and Transparency Report 2023". The PHP Foundation. Retrieved 2025-08-19.

theregister.com (Global: 3,700^th place; English: 2,360^th place)

Anderson, Tim. "PHP Foundation formed to fund core developers". www.theregister.com. Retrieved 2023-12-05.

theserverpages.com (Global: low place; English: low place)

"Visibility (PHP Manual)". theserverpages.com. 2005-05-19. Archived from the original on 2010-09-24. Retrieved 2010-08-26.

toykeeper.net (Global: low place; English: low place)

"Problems with PHP". Retrieved 20 December 2010.

trongate.io (Global: low place; English: low place)

"It's time for the PHP Foundation to #StopBreakingPHP". trongate.io. Archived from the original on 2023-12-12. Retrieved 2023-11-27.

twitter.com (Global: 23^rd place; English: 32^nd place)

Lerdorf, Rasmus (2012-07-20). "I wonder why people keep writing that PHP was ever written in Perl. It never was. #php". Twitter. Retrieved 2014-09-04.

usenix.org (Global: 5,990^th place; English: 3,752^nd place)

Argyros, George; Kiayias, Aggelos (10 August 2012). "I Forgot Your Password: Randomness Attacks Against PHP Applications". usenix.org. USENIX. Retrieved 19 April 2024.

w3.org (Global: 691^st place; English: 581^st place)

Bray, Tim; et al. (26 November 2008). "Processing Instructions". Extensible Markup Language (XML) 1.0 (Fifth Edition). W3C. Retrieved 2009-06-18.

w3techs.com (Global: 6,851^st place; English: 6,372^nd place)

"Usage statistics of PHP for websites". W3Techs – World Wide Web Technology Surveys. W3Techs. Retrieved 21 May 2025.
"Usage Statistics and Market Share of PHP Version 4 for Websites, May 2025". w3techs.com.
"Usage Statistics and Market Share of PHP Version 5 for Websites, May 2025". w3techs.com.
"Usage Statistics and Market Share of PHP Version 7 for Websites, May 2025". w3techs.com.
"Usage Statistics and Market Share of PHP Version 8 for Websites, May 2025". w3techs.com.

web.archive.org (Global: 1^st place; English: 1^st place)

Lerdorf, Rasmus (26 April 2017). "PHP on Hormones – history of PHP presentation by Rasmus Lerdorf given at the MySQL Conference in Santa Clara, California". The Conversations Network. Archived from the original on 29 July 2013. Retrieved 22 June 2009.
"Introduction: What can PHP do?". PHP Manual. Archived from the original on 16 February 2009. Retrieved 5 March 2009.
"Embedding PHP in HTML". O'Reilly. 2001-05-03. Archived from the original on 2008-02-19. Retrieved 2008-02-25.
Lerdorf, Rasmus (2007-04-26). "PHP on Hormones". The Conversations Network. Archived from the original (mp3) on 2019-01-06. Retrieved 2009-06-22.
"Rasmus Lerdorf, Senior Technical Yahoo: PHP, Behind the Mic". 2003-11-19. Archived from the original on 2013-07-28.
"PHP – Acronym Meaning Vote". PHP.net. Archived from the original on August 15, 2000.
"Zend Engine version 2.0: Feature Overview and Design". Zend Technologies Ltd. Archived from the original on 2006-07-19. Retrieved 2006-09-17.
Kerner, Sean Michael (2008-02-01). "PHP 4 is Dead—Long Live PHP 5". InternetNews. Archived from the original on 2018-08-06. Retrieved 2018-12-16.
Trachtenberg, Adam (2004-07-15). "Why PHP 5 Rocks!". O'Reilly. Archived from the original on 2016-03-31. Retrieved 2008-02-22.
"GoPHP5". Archived from the original on 2011-07-17.
"PHP projects join forces to Go PHP 5" (PDF). GoPHP5 Press Release. Archived from the original (PDF) on 2019-08-04. Retrieved 2008-02-23.
"GoPHP5". GoPHP5. Archived from the original on 2011-04-27. Retrieved 2008-02-22.
"The Neverending Muppet Debate of PHP 6 v PHP 7". Archived from the original on 2015-11-19. Retrieved 2015-11-19.
"PHP 5.5.0 changes". php.net. Archived from the original on 2015-03-01. Retrieved 2015-03-03.
"Visibility (PHP Manual)". theserverpages.com. 2005-05-19. Archived from the original on 2010-09-24. Retrieved 2010-08-26.
"How do computer languages work?". Archived from the original on 2011-07-16. Retrieved 2009-11-04.
Julien Pauli; Nikita Popov; Anthony Ferrara. "PHP Internals Book". PHP Internals Book. Archived from the original on 2025-01-21. Retrieved 2025-01-21.
"Alternative PHP Cache". PHP.net. Archived from the original on 2013-11-15. Retrieved 2013-09-21.
Darryl Patterson (5 August 2004). "Simplify Business Logic with PHP DataObjects — O'Reilly Media". ibm.com. Archived from the original on 16 December 2014. Retrieved 16 December 2014.
Krill, Paul (19 October 2005). "PHP catching on at enterprises, vying with Java". InfoWorld. Archived from the original on 13 July 2014.
"Cross Reference: /PHP_5_4/ext/standard/". php.net. Archived from the original on 16 March 2012. Retrieved 16 December 2014.
"Developing Custom PHP Extensions". devnewz.com. 2002-09-09. Archived from the original on 2008-02-18. Retrieved 2008-02-25.
"It's time for the PHP Foundation to #StopBreakingPHP". trongate.io. Archived from the original on 2023-12-12. Retrieved 2023-11-27.
"Command line usage: Introduction". php.net. Archived from the original on 2021-03-21. Retrieved 2013-09-22.
"PHP: Apache 2.x on Microsoft Windows". php.net. Archived from the original on 2013-09-26. Retrieved 2013-09-22.
"Command line usage: Introduction". php.net. Archived from the original on 2021-03-21. Retrieved 2013-09-22.
"Installing PHP-GTK 2". php.net. Archived from the original on 2013-12-12. Retrieved 2013-09-22.
"Windows Azure SDK for PHP — Interoperability Bridges and Labs Center". interoperabilitybridges.com. Archived from the original on 2014-03-20. Retrieved 2014-03-06.
"PHP Server-Side Scripting Language". Indiana University. 2007-04-04. Archived from the original on 2016-01-21. Retrieved 2008-02-25.
"PHP at the core: Extension structure". PHP.net. Archived from the original on 2013-09-26. Retrieved 2013-09-22.
"PHP at the core: The "counter" Extension – A Continuing Example". PHP.net. Archived from the original on 2013-09-26. Retrieved 2013-09-22.
"Extension Writing Part I: Introduction to PHP and Zend". Zend Technologies. 2005-03-01. Archived from the original on 2013-09-24. Retrieved 2013-09-22.
"Extension Writing Part II: Parameters, Arrays, and ZVALs". Zend Technologies. 2005-06-06. Archived from the original on 2013-09-26. Retrieved 2013-09-22.
"Extension Writing Part II: Parameters, Arrays, and ZVALs (continued)". Zend Technologies. 2005-06-06. Archived from the original on 2013-09-26. Retrieved 2013-09-22.
"Extension Writing Part III: Resources". Zend Technologies. 2006-05-12. Archived from the original on 2013-09-26. Retrieved 2013-09-22.
"Wrapping C++ Classes in a PHP Extension". Zend Technologies. 2009-04-22. Archived from the original on 2013-09-20. Retrieved 2013-09-22.
"PHP and Drupal". Drupal.org. 16 September 2007. Archived from the original on 2010-02-08. Retrieved 2010-06-13.
"About". Moodle.org. Archived from the original on 2010-01-11. Retrieved 2009-12-20.
"Server requirements of SilverStripe". Archived from the original on 28 November 2014. Retrieved 13 October 2014. SilverStripe requires PHP 5.3.2+
"PHP-related vulnerabilities on the National Vulnerability Database". 2012-07-05. Archived from the original on 2009-06-28. Retrieved 2013-04-01.
"Taint mode decision, November 2007". Archived from the original on 2009-02-26.
"Hardened-PHP Project". 2008-08-15. Archived from the original on 2019-02-24. Retrieved 2019-08-22.
"Security: Using Register Globals". PHP Manual. PHP.net. Archived from the original on 2013-09-27. Retrieved 2013-09-22.
"Magic Quotes". PHP Manual. PHP.net. Archived from the original on 2014-02-08. Retrieved 2014-01-17.
"PHP Security Exploit With GIF Images". 2007-06-22. Archived from the original on 2013-09-27. Retrieved 2013-09-22.
"Passing Malicious PHP Through getimagesize()". 2007-06-04. Archived from the original on 2013-09-21. Retrieved 2013-09-22.
"Криптостойкость и небезопасное сравнение". ahack.ru (in Russian). Archived from the original on 4 July 2017.
Krawczyk, Pawel (2013). "Most common attacks on web applications". IPSec.pl. Archived from the original on 2015-04-15. Retrieved 2015-04-15.

webhostingtalk.com (Global: low place; English: low place)

"My host won't fix their Trojan". WebHosting Talk. Retrieved 2013-09-22.

wordpress.org (Global: 9,817^th place; English: 8,719^th place)

make.wordpress.org

"WordPress 6.4 PHP Compatibility". Make WordPress Hosting. 2023-11-16. Retrieved 2023-11-27.

wordpress.org

"About WordPress". Retrieved 2010-02-26. WordPress was [...] built on PHP

wwphp-fb.github.io (Global: low place; English: low place)

"Redirecting…". wwphp-fb.github.io.

x.com (Global: low place; English: low place)

Stogov, Dmitry [@dstogov] (4 December 2015). "It's not a secret that some #PHP7 optimization ideas came from HHVM, LuaJIT and V8. Thank you @HipHopVM @SaraMG. #php7thankyou" (Tweet) – via Twitter.

youtube.com (Global: 9^th place; English: 13^th place)

Popov, Nikita (13 July 2020). ""What's new in PHP 8.0?" Nikita Popov". PHP fwdays. Archived from the original on 2021-12-11. Retrieved 4 October 2020.

zdnet.com (Global: 786^th place; English: 558^th place)

"Programming languages: This old favourite is gaining popularity again". ZDNET. Retrieved 2023-12-05.

zend.com (Global: low place; English: low place)

devzone.zend.com

"Extension Writing Part I: Introduction to PHP and Zend". Zend Technologies. 2005-03-01. Archived from the original on 2013-09-24. Retrieved 2013-09-22.
"Extension Writing Part II: Parameters, Arrays, and ZVALs". Zend Technologies. 2005-06-06. Archived from the original on 2013-09-26. Retrieved 2013-09-22.
"Extension Writing Part II: Parameters, Arrays, and ZVALs (continued)". Zend Technologies. 2005-06-06. Archived from the original on 2013-09-26. Retrieved 2013-09-22.
"Extension Writing Part III: Resources". Zend Technologies. 2006-05-12. Archived from the original on 2013-09-26. Retrieved 2013-09-22.
"Wrapping C++ Classes in a PHP Extension". Zend Technologies. 2009-04-22. Archived from the original on 2013-09-20. Retrieved 2013-09-22.
"Taint mode decision, November 2007". Archived from the original on 2009-02-26.
"PHP Security Exploit With GIF Images". 2007-06-22. Archived from the original on 2013-09-27. Retrieved 2013-09-22.

zend.com

"Zend Engine version 2.0: Feature Overview and Design". Zend Technologies Ltd. Archived from the original on 2006-07-19. Retrieved 2006-09-17.
"Learn PHP Via PHP Training and PHP Certification". www.zend.com. Retrieved 2020-11-16.
"PHP Support for PHP 7.2 – 8.0 | PHP LTS | Zend by Perforce". Retrieved 2024-05-23.

php-legacy-docs.zend.com

"Backward Incompatible Changes". php-legacy-docs.zend.com. Retrieved 2025-06-20.

zephir-lang.com (Global: low place; English: low place)

docs.zephir-lang.com

"Why Zephir?". zephir-lang.com. 2015-10-20. Retrieved 2015-12-14.

PHP (English Wikipedia)

7php.com (Global: low place; English: low place)

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amazon.com (Global: 105th place; English: 79th place)

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archive.org (Global: 6th place; English: 6th place)

books.google.com (Global: 3rd place; English: 3rd place)

ckers.org (Global: low place; English: low place)

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externals.io (Global: low place; English: low place)

ghostarchive.org (Global: 32nd place; English: 21st place)

github.com (Global: 383rd place; English: 320th place)

gnu.org (Global: 1,475th place; English: 1,188th place)

gophp5.org (Global: low place; English: low place)

groups.google.com (Global: 1,518th place; English: 1,072nd place)

hardened-php.net (Global: low place; English: low place)

hhvm.com (Global: low place; English: low place)

howtogeek.com (Global: 6,527th place; English: 4,344th place)

i-programmer.info (Global: low place; English: low place)

ibm.com (Global: 1,131st place; English: 850th place)

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ibm.com

infoworld.com (Global: 3,696th place; English: 2,428th place)

internetnews.com (Global: low place; English: 8,800th place)

ipsec.pl (Global: low place; English: low place)

iu.edu (Global: 3,316th place; English: 1,982nd place)

webmaster.iu.edu

jetbrains.com (Global: 8,974th place; English: 7,712th place)

blog.jetbrains.com

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lwn.net (Global: 4,423rd place; English: 2,925th place)

mail-archive.com (Global: 8,986th place; English: 8,081st place)

marc.info (Global: low place; English: 8,542nd place)

mediawiki.org (Global: low place; English: 9,522nd place)

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php.net (Global: 4,194th place; English: 3,676th place)

wiki.php.net

php.net

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phparch.com (Global: low place; English: low place)

phpclasses.org (Global: low place; English: low place)

phpinternalsbook.com (Global: low place; English: low place)

raz0r.name (Global: low place; English: low place)

amazon.com (Global: 105^th place; English: 79^th place)

archive.org (Global: 6^th place; English: 6^th place)

books.google.com (Global: 3^rd place; English: 3^rd place)

ghostarchive.org (Global: 32^nd place; English: 21^st place)

github.com (Global: 383^rd place; English: 320^th place)

gnu.org (Global: 1,475^th place; English: 1,188^th place)

groups.google.com (Global: 1,518^th place; English: 1,072^nd place)

howtogeek.com (Global: 6,527^th place; English: 4,344^th place)

ibm.com (Global: 1,131^st place; English: 850^th place)

infoworld.com (Global: 3,696^th place; English: 2,428^th place)

internetnews.com (Global: low place; English: 8,800^th place)

iu.edu (Global: 3,316^th place; English: 1,982^nd place)

jetbrains.com (Global: 8,974^th place; English: 7,712^th place)

lwn.net (Global: 4,423^rd place; English: 2,925^th place)

mail-archive.com (Global: 8,986^th place; English: 8,081^st place)

marc.info (Global: low place; English: 8,542^nd place)

mediawiki.org (Global: low place; English: 9,522^nd place)

nist.gov (Global: 355^th place; English: 454^th place)

php.net (Global: 4,194^th place; English: 3,676^th place)

researchgate.net (Global: 120^th place; English: 125^th place)

slideshare.net (Global: 2,161^st place; English: 2,535^th place)

stackoverflow.com (Global: 4,643^rd place; English: 2,973^rd place)

sun.com (Global: 5,060^th place; English: 4,600^th place)

theregister.com (Global: 3,700^th place; English: 2,360^th place)

twitter.com (Global: 23^rd place; English: 32^nd place)

usenix.org (Global: 5,990^th place; English: 3,752^nd place)

w3.org (Global: 691^st place; English: 581^st place)

w3techs.com (Global: 6,851^st place; English: 6,372^nd place)

web.archive.org (Global: 1^st place; English: 1^st place)

wordpress.org (Global: 9,817^th place; English: 8,719^th place)

youtube.com (Global: 9^th place; English: 13^th place)

zdnet.com (Global: 786^th place; English: 558^th place)