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@ 2017-05-03T07:56:26Z

<?php
preg_match_all(
    '/(EX[0-9]{4}-(0[1-9]|1[0-2])-(0[1-9]|[1-2][0-9]|3[0-1]))(*)/',
    'EX201705031321231',
    $matches,
    PREG_PATTERN_ORDER
);
var_dump($matches);

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
preg_match_all: documentation ( source)

preferences:dark modelive preview

61.63 ms | 402 KiB | 5 Q