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run code in 150+ php & hhvm versions
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<?php $stats=[ ['statname'=>'foo', 'totalStatPower'=>1], ['statname'=>'bar', 'totalStatPower'=>2], ['statname'=>'foo', 'totalStatPower'=>3], ]; $totals = array_reduce( $stats, function( $a, $b ) { $a[ $b['statname'] ] += $b['totalStatPower']; return $a; }, [] ); var_dump( $totals );
Output for 5.4.0 - 7.1.0
Notice: Undefined index: foo in /in/UOkln on line 8 Notice: Undefined index: bar in /in/UOkln on line 8 array(2) { ["foo"]=> int(4) ["bar"]=> int(2) }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/UOkln on line 2
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 '[' in /in/UOkln on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/UOkln on line 2
Process exited with code 255.