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@ 2014-10-28T21:08:05Z

<?php



var_dump(preg_match('[0-9a-zA-Z]', 'bob', $matches), $matches);
echo '---------', PHP_EOL;
var_dump(preg_match('~[0-9a-zA-Z]~', 'bob', $matches), $matches);
echo '---------', PHP_EOL;

var_dump(preg_match('~[0-9a-zA-Z]+~', 'bob', $matches), $matches);

?>

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
preg_match: documentation ( source)

preferences:dark modelive preview

44.54 ms | 402 KiB | 5 Q