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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 git.master, git.master_jit, rfc.property-hooks
Warning: Undefined array key "foo" in /in/UOkln on line 8 Warning: Undefined array key "bar" in /in/UOkln on line 8 array(2) { ["foo"]=> int(4) ["bar"]=> int(2) }

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