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@ 2013-10-19T12:48:50Z

<?php
$var = '10.25E';
    $number = (float)$var;
    $letter = substr($var, strlen($number));
var_dump(array($number, $letter));

Output
Performance
VLD
References
Branches

substr: documentation ( source)
var_dump: documentation ( source)

preferences:dark modelive preview

41.35 ms | 402 KiB | 5 Q