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@ 2014-08-05T13:56:59Z

<?php

$dot = '3.96';
$comma = '3,96';
$space = '3 096';
$muiltidot = '3.96.5';

var_dump(
floatval($dot),
    floatval($comma),
    floatval($space),
    floatval($multidot)
    );

Output
Performance
VLD
References
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var_dump: documentation ( source)

preferences:dark modelive preview

36.64 ms | 402 KiB | 5 Q