php自定义排序uasort函数示例【二维数组按指定键值排序】_php技巧_

 /* * 二维数组按指定键值排须 */ function arr_sort($array,$key,$order="asc"){//asc是升序 desc是降序//按 I$v){ $arr_nums[$k]=$v[$key]; } if($order=='asc'){ uasort($arr_nums,'my_sort_asc'); }else{ uasort($arr_nums,'my_sort_desc'); } foreach($arr_nums as $k=>$v){ $arr[$k]=$array[$k]; } return $arr; } function my_sort_desc($a,$b){ if($a==$b) return 0; if($a=='I' && $b!='I') return 1; if($a=='L' && $b!='I') return 1; if($a=='L' && $b=='I') return -1; if($a=='M' && $b!='H') return -1; if($a=='M' && $b=='H') return 1; if($a=='H' && $b!='H') return -1; } function my_sort_asc($a,$b){ if($a==$b) return 0; if($a=='I' && $b!='I') return -1; if($a=='L' && $b!='I') return -1; if($a=='L' && $b=='I') return 1; if($a=='M' && $b!='H') return 1; if($a=='M' && $b=='H') return -1; if($a=='H' && $b!='H') return 1; }