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@ 2013-09-08T00:47:07Z

<?php
$somevar = '20,5';
$filtered = filter_var($somevar, FILTER_SANITIZE_NUMBER_FLOAT);
var_dump($filtered);

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
filter_var: documentation ( source)

preferences:dark modelive preview

37.34 ms | 402 KiB | 5 Q