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run code in 150+ php & hhvm versions
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<?php $data[] = array('title' => 'hello', 'attributes' => array('id' => 4, 'startdate' => '2013-06-11')); $data[] = array('title' => 'hello second entry', 'attributes' => array('id' => 6, 'startdate' => '2013-04-11')); print "Inital Data\n"; print_r($data); print "\n"; usort($data, function($a, $b) { if ($a['attributes']['startdate'] > $b['attributes']['startdate']) return 1; if ($a['attributes']['startdate'] < $b['attributes']['startdate']) return -1; return 0; }); print "Sorted Data\n"; print_r($data); print "\n";
Output for 5.3.0 - 7.1.0
Inital Data Array ( [0] => Array ( [title] => hello [attributes] => Array ( [id] => 4 [startdate] => 2013-06-11 ) ) [1] => Array ( [title] => hello second entry [attributes] => Array ( [id] => 6 [startdate] => 2013-04-11 ) ) ) Sorted Data Array ( [0] => Array ( [title] => hello second entry [attributes] => Array ( [id] => 6 [startdate] => 2013-04-11 ) ) [1] => Array ( [title] => hello [attributes] => Array ( [id] => 4 [startdate] => 2013-06-11 ) ) )
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/TjhdW on line 11
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/TjhdW on line 11
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/TjhdW on line 11
Process exited with code 255.