<?php
$arr = array('21250000.022000', '20.00', '200', '20.50');
foreach ($arr as $n)
echo (double) $n. "\n";
?>
PD9waHAKCiAgICAkYXJyID0gYXJyYXkoJzIxMjUwMDAwLjAyMjAwMCcsICcyMC4wMCcsICcyMDAnLCAnMjAuNTAnKTsKICAgIAogICAgZm9yZWFjaCAoJGFyciBhcyAkbikKICAgICAgIGVjaG8gKGRvdWJsZSkgJG4uICJcbiI7Cgo/Pg==