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@ 2014-01-23T20:25:28Z

<?php

$options = array('decimal' => ',');
$var = '3,14';
$result = filter_var(
    $var,
    FILTER_VALIDATE_FLOAT,
    array(array('options' => $options))
);

var_dump($result);

Output
Performance
VLD
References
Branches

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

preferences:dark modelive preview

40.71 ms | 402 KiB | 5 Q