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run code in 200+ php & hhvm versions
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<?php function parseIntOrException($val) { $int = (int)$val; if ((string)$int !== (string)$val) { return FALSE; } return $int; } $result = array(); foreach (array(1, '2', '3.0', 4.0, 5,0,'0') as $x) { $result[var_export($x, TRUE)] = var_export(parseIntOrException($x), TRUE); } print_r($result);
based on Tf8nh
Output for 7.0.2 - 7.2.0
Array ( [1] => 1 ['2'] => 2 ['3.0'] => false [4.0] => 4 [5] => 5 [0] => 0 ['0'] => 0 )
Output for 5.3.19 - 7.0.1
Array ( [1] => 1 ['2'] => 2 ['3.0'] => false [4] => 4 [5] => 5 [0] => 0 ['0'] => 0 )