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@ 2013-12-30T11:48:49Z

<?php
var_dump(
    substr('abc', 3, 0)
    , substr('abc', 0, 0)
);

Output
Performance
VLD
References
Branches

substr: documentation ( source)
var_dump: documentation ( source)

preferences:dark modelive preview

39.64 ms | 402 KiB | 5 Q