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<?php $arr = array( array( 'imp' => 1000, 'clk' => 100, 'date' => 20150601 ), array( 'imp' => 1002, 'clk' => 102, 'date' => 20150602 ), array( 'imp' => 1003, 'clk' => 103, 'date' => 20150601 ) ); $result = array_reduce($arr, function($left, $right) { if(isset($right['imp'])) $left['imp'] += $right['imp']; if(isset($right['clk'])) $left['clk'] += $right['clk']; return $left; }, [ 'imp' => 0, 'clk' => 0 ]); print_r($result);
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 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 ( [imp] => 3005 [clk] => 305 )
Output for 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/58v94 on line 28
Process exited with code 255.
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/58v94 on line 23
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/58v94 on line 23
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/58v94 on line 23
Process exited with code 255.
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242.14 ms | 401 KiB | 311 Q