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<?php array( 0 => array( "a" => "r1", "b" => "c1", "c" => "d1", ), 1 => array( "a" => "r1", "b" => "c1", "c" => "d2", ), 2 => array( "a" => "r1", "b" => "c1", "c" => "d3", ), 3 => array( "a" => "r1", "b" => "c2", "c" => "d1", ), 4 => array( "a" => "r1", "b" => "c2", "c" => "d3", ), 5 => array( "a" => "r1", "b" => "c3", "c" => "d1", ) ); $count = 0; for($i=1; $i<=3; $i++){ for($j=1; $j<=3; $j++){ $data[$count] = array( 'a' => '', 'b' => 'D'.$j, 'c' => 'C'.$i ); for($r=0; $r<9; $r++){ if(isset($rows[$r]) && $rows[$r]['b'] == 'C'.$i && $rows[$r]['c'] == 'D'.$j) { $data[$count] = array( 'a' => $rows[$r]['a'], 'b' => $rows[$r]['b'], 'c' => $rows[$r]['c'] ); } } $count++; } } print_r($data);
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Array ( [0] => Array ( [a] => [b] => D1 [c] => C1 ) [1] => Array ( [a] => [b] => D2 [c] => C1 ) [2] => Array ( [a] => [b] => D3 [c] => C1 ) [3] => Array ( [a] => [b] => D1 [c] => C2 ) [4] => Array ( [a] => [b] => D2 [c] => C2 ) [5] => Array ( [a] => [b] => D3 [c] => C2 ) [6] => Array ( [a] => [b] => D1 [c] => C3 ) [7] => Array ( [a] => [b] => D2 [c] => C3 ) [8] => Array ( [a] => [b] => D3 [c] => C3 ) )

preferences:
235.37 ms | 407 KiB | 354 Q