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@ 2014-07-09T09:03:07Z

<?php
$str = '00:03:FF:B5:0E:3A 00:03:FF:B6:0E:3A 00:03:FF:B1:0E:3A';
print substr($str, 0, strpos( $str, ' '));

Output
Performance
VLD
References
Branches

substr: documentation ( source)
strpos: documentation ( source)

preferences:dark modelive preview

41.25 ms | 402 KiB | 5 Q