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<?php $arr=array( "0"=> array( 0=> array ( "ID"=> 118, "post_date"=> "2014-04-28 07:27:37", "post_title"=> "Title 1" ), 1=> array ( "ID"=> 119, "post_date"=> "2014-04-29 07:27:37", "post_title"=> "title 2" ) ), "1"=> array( 0=> array ( "ID"=> 135, "post_date"=> "2014-04-28 06:37:37", "post_title"=> "Title 3" ), 1=> array ( "ID"=> 148, "post_date"=> "2014-04-25 07:27:37", "post_title"=> "Title 4" ) ), "2"=> array( 0=> array ( "ID"=> 135, "post_date"=> "2014-04-24 06:37:37", "post_title"=> "Title 5" ), 1=> array ( "ID"=> 148, "post_date"=> "2014-04-25 09:21:37", "post_title"=> "Title 6" ) ) ); usort($arr, function($a, $b) { return $a['post_title'] - $b['post_title']; }); print_r($arr);
Output for 7.0.0 - 7.1.0
Notice: Undefined index: post_title in /in/RG5DL on line 41 Notice: Undefined index: post_title in /in/RG5DL on line 41 Notice: Undefined index: post_title in /in/RG5DL on line 41 Notice: Undefined index: post_title in /in/RG5DL on line 41 Array ( [0] => Array ( [0] => Array ( [ID] => 118 [post_date] => 2014-04-28 07:27:37 [post_title] => Title 1 ) [1] => Array ( [ID] => 119 [post_date] => 2014-04-29 07:27:37 [post_title] => title 2 ) ) [1] => Array ( [0] => Array ( [ID] => 135 [post_date] => 2014-04-28 06:37:37 [post_title] => Title 3 ) [1] => Array ( [ID] => 148 [post_date] => 2014-04-25 07:27:37 [post_title] => Title 4 ) ) [2] => Array ( [0] => Array ( [ID] => 135 [post_date] => 2014-04-24 06:37:37 [post_title] => Title 5 ) [1] => Array ( [ID] => 148 [post_date] => 2014-04-25 09:21:37 [post_title] => Title 6 ) ) )
Output for 5.3.0 - 5.6.28
Notice: Undefined index: post_title in /in/RG5DL on line 41 Notice: Undefined index: post_title in /in/RG5DL on line 41 Notice: Undefined index: post_title in /in/RG5DL on line 41 Notice: Undefined index: post_title in /in/RG5DL on line 41 Array ( [0] => Array ( [0] => Array ( [ID] => 135 [post_date] => 2014-04-24 06:37:37 [post_title] => Title 5 ) [1] => Array ( [ID] => 148 [post_date] => 2014-04-25 09:21:37 [post_title] => Title 6 ) ) [1] => Array ( [0] => Array ( [ID] => 135 [post_date] => 2014-04-28 06:37:37 [post_title] => Title 3 ) [1] => Array ( [ID] => 148 [post_date] => 2014-04-25 07:27:37 [post_title] => Title 4 ) ) [2] => Array ( [0] => Array ( [ID] => 118 [post_date] => 2014-04-28 07:27:37 [post_title] => Title 1 ) [1] => Array ( [ID] => 119 [post_date] => 2014-04-29 07:27:37 [post_title] => title 2 ) ) )
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/RG5DL on line 40
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/RG5DL on line 40
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/RG5DL on line 40
Process exited with code 255.