背景：现在有一个多维数组，该数组里面的部分一维数组key值是完全一样的，现将一样的数组提取出来，用于做列表展示。
封装方法：
1 function arrClassify($arr){ 2 $data = array(); 3 $a = 0; 4 while ($arr){ 5 $key = $arr[0]; 6 $data[$a]['query'] = '第'.$a.'类'; 7 $data[$a]['head'] = array_keys($key); 8 $data[$a]['value'][] = $key; 9 unset($arr[0]); 10 $i = 1; 11 while($i <= count($arr)){ 12 $result=array_diff_key($arr[$i],$key); 13 if(!$result){ 14 $data[$a]['value'][] = $arr[$i]; 15 unset($arr[$i]); 16 } 17 $i++; 18 } 19 $arr = array_values($arr); 20 $a++; 21 } 22 return $data; 23 }
示例：
1 <?php 2 $arr = array( 3 array( 4 'a' => 1, 5 'b' => 1, 6 'c' => 1, 7 'd' => 1, 8 ), 9 array( 10 'e' => 1, 11 'd' => 1, 12 'f' => 1, 13 'g' => 1, 14 ), 15 array( 16 'a' => 2, 17 'b' => 2, 18 'c' => 2, 19 'd' => 2, 20 ), 21 array( 22 'e' => 2, 23 'd' => 2, 24 'f' => 2, 25 'g' => 2, 26 ), 27 array( 28 'e' => 2, 29 'd' => 2, 30 'f' => 2, 31 'g' => 2, 32 'h' => 2, 33 ), 34 array( 35 'e' => 2, 36 'd' => 3, 37 'f' => 9, 38 'g' => 2, 39 'h' => 3, 40 ), 41 ); 42 $a = arrClassify($arr); 43 var_dump($a);
运行结果：
测试结果
1 array (size=3) 2 0 => 3 array (size=3) 4 'query' => string '第0类' (length=7) 5 'head' => 6 array (size=4) 7 0 => string 'a' (length=1) 8 1 => string 'b' (length=1) 9 2 => string 'c' (length=1) 10 3 => string 'd' (length=1) 11 'value' => 12 array (size=2) 13 0 => 14 array (size=4) 15 'a' => int 1 16 'b' => int 1 17 'c' => int 1 18 'd' => int 1 19 1 => 20 array (size=4) 21 'a' => int 2 22 'b' => int 2 23 'c' => int 2 24 'd' => int 2 25 1 => 26 array (size=3) 27 'query' => string '第1类' (length=7) 28 'head' => 29 array (size=4) 30 0 => string 'e' (length=1) 31 1 => string 'd' (length=1) 32 2 => string 'f' (length=1) 33 3 => string 'g' (length=1) 34 'value' => 35 array (size=2) 36 0 => 37 array (size=4) 38 'e' => int 1 39 'd' => int 1 40 'f' => int 1 41 'g' => int 1 42 1 => 43 array (size=4) 44 'e' => int 2 45 'd' => int 2 46 'f' => int 2 47 'g' => int 2 48 2 => 49 array (size=3) 50 'query' => string '第2类' (length=7) 51 'head' => 52 array (size=5) 53 0 => string 'e' (length=1) 54 1 => string 'd' (length=1) 55 2 => string 'f' (length=1) 56 3 => string 'g' (length=1) 57 4 => string 'h' (length=1) 58 'value' => 59 array (size=2) 60 0 => 61 array (size=5) 62 'e' => int 2 63 'd' => int 2 64 'f' => int 2 65 'g' => int 2 66 'h' => int 2 67 1 => 68 array (size=5) 69 'e' => int 2 70 'd' => int 3 71 'f' => int 9 72 'g' => int 2 73 'h' => int 3