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@ 2015-11-30T16:38:31Z

<?php

$amount = 'M=$1.5';

$amt = $amount * (substr(amt, 0, (strlen($amt)-1) ) / 100);
$amt = round($amt, 2, PHP_ROUND_HALF_UP);

echo (float)$amt;

Output
Performance
VLD
References
Branches

substr: documentation ( source)
round: documentation ( source)

preferences:dark modelive preview

58.92 ms | 402 KiB | 5 Q