PHP 二维数组按照指定键值去重、排序

 

博主在项目开发中,发现了这两个需求,然后整理了这两个方法与大家分享。欢迎吐槽,欢迎转载使用。话不多说,先上代码:

    /**
     * 二维数组按照指定键值去重
     * @param $arr 需要去重的二维数组
     * @param $key 需要去重所根据的索引
     * @return mixed
     */
function arr_uniq($arr,$key)
{
    $key_arr = [];
    foreach ($arr as $k => $v) {
        if (in_array($v[$key],$key_arr)) {
            unset($arr[$k]);
        } else {
            $key_arr[] = $v[$key];
        }
    }
    sort($arr);
    return $arr;
}
    /**
     * 二维数组按指定的键值排序
     * @param $array 需要排序的二维数组
     * @param $keys 需要排序根据的索引
     * @param string $type 正序/倒叙(默认倒序)
     * @return array|string
     */
function array_sort( $array, $keys, $type='asc' ) 
{
        if( !isset( $array ) || !is_array( $array ) || empty( $array ) ) return '';
        if( !isset( $keys ) || trim( $keys ) == '' ) return '';
        if( !isset( $type ) || $type == '' || !in_array( strtolower( $type ), array( 'asc', 'desc' ) ) ) return '';
        
        $keysvalue  = [];
        foreach( $array as $key => $val ) {
            $val[ $keys ]   = str_replace( '-', '', $val[ $keys ] );
            $val[ $keys ]   = str_replace( ' ', '', $val[ $keys ] );
            $val[ $keys ]   = str_replace( ':', '', $val[ $keys ] );
            $keysvalue[]    = $val[ $keys ];
        }
        
        asort( $keysvalue ); //key值排序
        reset( $keysvalue ); //指针重新指向数组第一个
        foreach( $keysvalue as $key => $vals ) 
            $keysort[] = $key;
        
        $keysvalue  = [];
        $count      = count( $keysort );
        if( strtolower( $type ) != 'asc' ) {
            for( $i = $count - 1; $i >= 0; $i-- ) 
                $keysvalue[] = $array[ $keysort[ $i ] ];
        }else{
            for( $i = 0; $i < $count; $i++ )
                $keysvalue[] = $array[ $keysort[ $i ] ];
        }
        return $keysvalue;
    }

再来看两个示例:

 1 
 2 $arr = [
 3     [
 4         'total'=>123,
 5         'serve'=>456,
 6         'speed'=>789
 7     ],
 8     [
 9         'total'=>123,
10         'serve'=>45,
11         'speed'=>89
12     ],
13     [
14         'total'=>1234,
15         'serve'=>456,
16         'speed'=>789
17     ],
18     [
19         'total'=>"123",
20         'serve'=>456,
21         'speed'=>789
22     ]
23 ];
// 去重
24 $re = arr_uniq($arr,'total'); 25 var_dump($re); 26 输出: 27 array(2) { 28 [0] => 29 array(3) { 30 'total' => 31 int(123) 32 'serve' => 33 int(456) 34 'speed' => 35 int(789) 36 } 37 [1] => 38 array(3) { 39 'total' => 40 int(1234) 41 'serve' => 42 int(456) 43 'speed' => 44 int(789) 45 } 46 } 47
//排序 48 $re = array_sort($arr, 'speed', 'desc'); 49 var_dump($re); 50 51 输出: 52 array(4) { 53 [0] => 54 array(3) { 55 'total' => 56 string(3) "123" 57 'serve' => 58 int(456) 59 'speed' => 60 int(789) 61 } 62 [1] => 63 array(3) { 64 'total' => 65 int(1234) 66 'serve' => 67 int(456) 68 'speed' => 69 int(789) 70 } 71 [2] => 72 array(3) { 73 'total' => 74 int(123) 75 'serve' => 76 int(456) 77 'speed' => 78 int(789) 79 } 80 [3] => 81 array(3) { 82 'total' => 83 int(123) 84 'serve' => 85 int(45) 86 'speed' => 87 int(89) 88 } 89 }

 明白了没,哈哈,是不是很实用。。

posted @ 2017-12-05 16:22  Evergrande_Wang  阅读(3988)  评论(0编辑  收藏  举报