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<?php $myarray[0]['height'] = 175; $myarray[0]['weight'] = 68; $myarray[0]['age'] = 44; $myarray[1]['height'] = 166; $myarray[1]['weight'] = 82; $myarray[1]['age'] = 56; $myarray[2]['height'] = 188; $myarray[2]['weight'] = 82; $myarray[2]['age'] = 35; function build_sorter($key) { return function ($a, $b) use ($key) { return strnatcmp($a[$key], $b[$key]); }; } usort($myarray, build_sorter('age')); print_r($myarray);
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
Array ( [0] => Array ( [height] => 188 [weight] => 82 [age] => 35 ) [1] => Array ( [height] => 175 [weight] => 68 [age] => 44 ) [2] => Array ( [height] => 166 [weight] => 82 [age] => 56 ) )
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/686Gn on line 15
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
Parse error: parse error, unexpected T_FUNCTION in /in/686Gn on line 15
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/686Gn on line 15
Process exited with code 255.

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