RegEx to find all the keywords:
\b(
(a(bstract|nd|rray|s))|
(c(a(llable|se|tch)|l(ass|one)|on(st|tinue)))|
(d(e(clare|fault)|ie|o))|
(e(cho|lse(if)?|mpty|nd(declare|for(each)?|if|switch|while)|val|x(it|tends)))|
(f(inal|or(each)?|unction))|
(g(lobal|oto))|
(i(f|mplements|n(clude(_once)?|st(anceof|eadof)|terface)|sset))|
(n(amespace|ew))|
(p(r(i(nt|vate)|otected)|ublic))|
(re(quire(_once)?|turn))|
(s(tatic|witch))|
(t(hrow|r(ait|y)))|
(u(nset|se))|
(__halt_compiler|break|list|(x)?or|var|while)
)\b
Liste der Schlüsselwörter
Die folgenden Begriffe haben in PHP eine spezielle Bedeutung. Einige von ihnen sehen aus wie Funktionen, Konstanten usw., in Wirklichkeit handelt es sich aber um Sprachkonstrukte. Keines der folgenden Wörter kann als Name für eine benutzerdefinierte Konstante, Klasse, Funktion oder Methode genutzt werden. Die Nutzung als Variablenname ist in der Regel möglich, könnte aber Verwirrung stiften.
Von PHP 7.0.0 an sind diese Schlüsselwörter als Eigenschafts-, Konstanten-
und Methodennamen von Klassen, Interfaces und Traits erlaubt, außer dass
class nicht als Konstantenname verwendet werden darf.
| __halt_compiler() | abstract | and | array() | as |
| break | callable (von PHP 5.4 an) | 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 (von PHP 5.5 an) | fn (as of PHP 7.4) | for | foreach |
| function | global | goto (von PHP 5.3 an) | if | implements |
| include | include_once | instanceof | insteadof (von PHP 5.4 an) | interface |
| isset() | list() | namespace (von PHP 5.3 an) | new | or |
| private | protected | public | require | |
| require_once | return | static | switch | throw |
| trait (von PHP 5.4 an) | try | unset() | use | var |
| while | xor | yield (von PHP 5.5 an) | yield from (as of PHP 7.0) |
| __CLASS__ | __DIR__ (von PHP 5.3 an) | __FILE__ | __FUNCTION__ | __LINE__ | __METHOD__ |
| __NAMESPACE__ (von PHP 5.3 an) | __TRAIT__ (von PHP 5.4 an) |
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User Contributed Notes 5 notes
martindilling at gmail dot com ¶
11 years ago
Thomas Hansen ¶
7 years ago
Please note that reserved words are still not allowed to be used as namespace or as part of it:
<?php
namespace MyNameSpace\List;
class Test
{
}
?>
This will fail with a Parse error: syntax error, unexpected 'List' (T_LIST), expecting identifier (T_STRING)
Chris ¶
11 years ago
Here they are as arrays:
<?php
$keywords = array('__halt_compiler', 'abstract', 'and', 'array', 'as', 'break', 'callable', 'case', 'catch', 'class', 'clone', 'const', 'continue', 'declare', 'default', 'die', 'do', 'echo', 'else', 'elseif', 'empty', 'enddeclare', 'endfor', 'endforeach', 'endif', 'endswitch', 'endwhile', 'eval', 'exit', 'extends', 'final', 'for', 'foreach', 'function', 'global', 'goto', 'if', 'implements', 'include', 'include_once', 'instanceof', 'insteadof', 'interface', 'isset', 'list', 'namespace', 'new', 'or', 'print', 'private', 'protected', 'public', 'require', 'require_once', 'return', 'static', 'switch', 'throw', 'trait', 'try', 'unset', 'use', 'var', 'while', 'xor');
$predefined_constants = array('__CLASS__', '__DIR__', '__FILE__', '__FUNCTION__', '__LINE__', '__METHOD__', '__NAMESPACE__', '__TRAIT__');
?>
Along with get_defined_functions() and get_defined_constants(), this can be useful for checking eval() statements.
Johnny D. ¶
3 years ago
const FORBIDDEN_TYPES = [
'null',
'bool',
'false',
'true',
'int',
'float',
'string',
];
bla at taxistop dot be ¶
5 years ago
This list doesn't include 'self' and 'parent', which I take are indeed keywords.
