@ 2015-10-05T17:58:43Z <?php
$tokenStream = []; // [tokenName, lexeme] pairs
$input = <<<'end'
$a = 3; // variable initialisation
end;
// Pre PHP 7 code
preg_replace_callback(
[
'~\$[a-z_][a-z\d_]*~i',
'~=~',
'~[\d]+~',
'~;~',
'~//.*~'
],
function ($match) use (&$tokenStream) {
if (strpos($match[0], '$') === 0) {
$tokenStream[] = ['T_VARIABLE', $match[0]];
} elseif (strpos($match[0], '=') === 0) {
$tokenStream[] = ['T_ASSIGN', $match[0]];
} elseif (ctype_digit($match[0])) {
$tokenStream[] = ['T_NUM', $match[0]];
} elseif (strpos($match[0], ';') === 0) {
$tokenStream[] = ['T_TERMINATE_STMT', $match[0]];
} elseif (strpos($match[0], '//') === 0) {
$tokenStream[] = ['T_COMMENT', $match[0]];
}
},
$input
);
// PHP 7+ code
preg_replace_callback_array(
[
'~\$[a-z_][a-z\d_]*~i' => function ($match) use (&$tokenStream) {
$tokenStream[] = ['T_VARIABLE', $match[0]];
},
'~=~' => function ($match) use (&$tokenStream) {
$tokenStream[] = ['T_ASSIGN', $match[0]];
},
'~[\d]+~' => function ($match) use (&$tokenStream) {
$tokenStream[] = ['T_NUM', $match[0]];
},
'~;~' => function ($match) use (&$tokenStream) {
$tokenStream[] = ['T_TERMINATE_STMT', $match[0]];
},
'~//.*~' => function ($match) use (&$tokenStream) {
$tokenStream[] = ['T_COMMENT', $match[0]];
}
],
$input
);
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Output for 7.0.0 - 7.0.32 , 7.1.0 - 7.1.33 , 7.2.0 - 7.2.33 , 7.3.0 - 7.3.33 , 7.4.0 - 7.4.33 , 8.0.0 - 8.0.30 , 8.1.0 - 8.1.28 , 8.2.0 - 8.2.18 , 8.3.0 - 8.3.4 , 8.3.6 Output for 8.3.5 Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
Output for 5.4.0 - 5.4.45 , 5.5.0 - 5.5.38 , 5.6.0 - 5.6.38 Fatal error: Call to undefined function preg_replace_callback_array() in /in/qkvvr on line 35
Process exited with code 255 . preferences:dark mode live preview
260.49 ms | 402 KiB | 369 Q