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<?php // Everything you enter here will be executed by our servers. Try it! $array = array( "id1" => array("unique" => 3), "id2" => array("unique" => 5), "id3" => array("unique" => 1), ); usort($array, function ($a, $b){ if ($a['unique'] == $b) { return 0; } return ($a['unique'] < $b['unique']) ? -1 : 1; }); print_r($array);
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.35, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Array ( [0] => Array ( [unique] => 1 ) [1] => Array ( [unique] => 3 ) [2] => Array ( [unique] => 5 ) )
Output for 5.2.3 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/8lHs0 on line 13
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.2
<br /> <b>Parse error</b>: syntax error, unexpected T_FUNCTION in <b>/in/8lHs0</b> on line <b>13</b><br />
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
<br /> <b>Parse error</b>: parse error, unexpected T_FUNCTION in <b>/in/8lHs0</b> on line <b>13</b><br />
Process exited with code 255.
Output for 4.3.2 - 4.3.4
<br /> <b>Parse error</b>: parse error in <b>/in/8lHs0</b> on line <b>13</b><br />
Process exited with code 255.

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