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)
Lista de palabras reservadas
Estas palabras tienen un significado especial en PHP. Algunas representan
cosas que se parecen a funciones, otras se parecen a constantes, etc.; pero
no lo son en realidad: son constructores del lenguaje.
Las siguientes palabras no pueden utilizarse como constantes, nombres de clases, nombres de funciones o métodos.
Se pueden usar como nombres de variables, pero podría dar lugar a confusiones.
Sin embargo, se permiten como propiedades, constantes y
métodos de clases, interfaces y traits, excepto que
la clase no se pueda usar como nombre de constante.
| __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 | finally | fn (a partir de PHP 7.4) | for | foreach | ||
| function | global | goto | if | implements | ||
| include | include_once | instanceof | insteadof | interface | ||
| isset() | list() | match (a partir de PHP 8.0) | namespace | new | ||
| or | private | protected | public | |||
| require | require_once | return | static | switch | ||
| throw | trait | try | unset() | use | ||
| var | while | xor | yield | yield from |
| __CLASS__ | __DIR__ | __FILE__ | __FUNCTION__ | __LINE__ | __METHOD__ |
| __NAMESPACE__ | __TRAIT__ |
add a note
User Contributed Notes 4 notes
Thomas Hansen ¶
8 years ago
martindilling at gmail dot com ¶
11 years ago
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
Chris ¶
12 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.
