List of Keywords

Contents

These words have special meaning in PHP. Some of them represent things which look like functions, some look like constants, and so on - but they're not, really: they are language constructs. You cannot use any of the following words as constants, class names, function or method names. Using them as variable names is generally OK, but could lead to confusion.

As of PHP 7.0.0 these keywords are allowed as property, constant, and method names of classes, interfaces and traits, except that class may not be used as constant name.

**PHP Keywords**
__halt_compiler()	abstract	and	array()	as
break	callable (as of PHP 5.4)	case	catch	class
clone	const	continue	declare	default
die()	do	echo	else	elseif
empty()	enddeclare	endfor	endforeach	endif
endswitch	endwhile	eval()	exit()	extends
final	finally (as of PHP 5.5)	for	foreach	function
global	goto (as of PHP 5.3)	if	implements	include
include_once	instanceof	insteadof (as of PHP 5.4)	interface	isset()
list()	namespace (as of PHP 5.3)	new	or	print
private	protected	public	require	require_once
return	static	switch	throw	trait (as of PHP 5.4)
try	unset()	use	var	while
xor	yield (as of PHP 5.5)	yield from (as of PHP 7.0)

**Compile-time constants**
__CLASS__	__DIR__ (as of PHP 5.3)	__FILE__	__FUNCTION__	__LINE__	__METHOD__
__NAMESPACE__ (as of PHP 5.3)	__TRAIT__ (as of PHP 5.4)

Find a PHP function

English translation

You have asked to visit this site in English. For now, only the interface is translated, but not all the content yet.

If you want to help me in translations, your contribution is welcome. All you need to do is register on the site, and send me a message asking me to add you to the group of translators, which will give you the opportunity to translate the pages you want. A link at the bottom of each translated page indicates that you are the translator, and has a link to your profile.

Thank you in advance.

Document created the 30/01/2003, last modified the 26/10/2018
Source of the printed document:https://www.gaudry.be/en/php-rf-reserved.keywords.html

The infobrol is a personal site whose content is my sole responsibility. The text is available under CreativeCommons license (BY-NC-SA). More info on the terms of use and the author.

References

Manuel PHP : http://php.net

These references and links indicate documents consulted during the writing of this page, or which may provide additional information, but the authors of these sources can not be held responsible for the content of this page.
The author This site is solely responsible for the way in which the various concepts, and the freedoms that are taken with the reference works, are presented here. Remember that you must cross multiple source information to reduce the risk of errors.

Contents Haut