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@ 2015-03-23T05:45:28Z

<?php
$s = "sdfsfs";
$a = floatval($s);
echo $a;


$t = "50x0.03";
echo is_numeric($t);

Output
Performance
VLD
References
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is_numeric: documentation ( source)

preferences:dark modelive preview

38.37 ms | 402 KiB | 5 Q