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run code in 150+ php & hhvm versions
Bugs & Features
<?php preg_match('/^-?\d+(\.\d+)?,-?\d+$/', '1000.0123123,-20000', $matches); print_r ($matches);
Output for 4.3.0 - 7.1.0
Array ( [0] => 1000.0123123,-20000 [1] => .0123123 )