3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $rgData = [ 3 => 1, 5 => 0, 1 => 2, 9 => 0, 0 => 1, 4 => 2, 2 => 1, 7 => 0, 6 => 0, 8 => 0, ]; $keys = array_keys($rgData); // Sort the array's keys usort($keys, function($a, $b) use($rgData){ $aVal = $rgData[$a]; $bVal = $rgData[$b]; // Compare the values if($aVal === $bVal){ // If they are the same, compare the keys return $a - $b; } // Otherwise compare the values return $aVal - $bVal; }); var_dump($rgData);
Output for 5.4.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(10) { [3]=> int(1) [5]=> int(0) [1]=> int(2) [9]=> int(0) [0]=> int(1) [4]=> int(2) [2]=> int(1) [7]=> int(0) [6]=> int(0) [8]=> int(0) }
Output for 5.3.28 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/MIqU0 on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.27
Parse error: syntax error, unexpected '[' in /in/I4iEC on line 3
Process exited with code 255.
Output for 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/I4iEC on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/I4iEC on line 3
Process exited with code 255.
Output for 4.3.0
Parse error: parse error, unexpected '[' in /in/MIqU0 on line 3
Process exited with code 255.