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@ 2018-10-05T10:35:02Z

<?php

$tag = 'p';

var_dump(preg_match('/^[\\w-:]+$/', $tag));

Output
Performance
VLD
References
Branches

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

preferences:dark modelive previewkey bindings

29.56 ms | 405 KiB | 5 Q