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@ 2018-09-25T15:44:49Z

<?php

var_dump(preg_match('~(?=.*\d)(?=.*[a-z])~i', 'a1'));

var_dump(preg_match('~(?=.*\d)(?=.*[a-z])~i', 'aaa'));

var_dump(preg_match('~(?=.*\d)(?=.*[a-z])~i', '111'));

var_dump(preg_match('~(?=.*\d)(?=.*[a-z])~i', '1a'));

Output
Performance
VLD
References
Branches

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

preferences:dark modelive previewkey bindings

42.81 ms | 1469 KiB | 5 Q