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run code in 150+ php & hhvm versions
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<?php $size = '3MB'; $value = substr($size, 0, -1); $unit = trim(substr($size, -2, 1)); var_dump($value); var_dump($unit);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
string(2) "3M" string(1) "M"