多维数组怎样快速索引

发布网友发布时间：2022-05-02 00:31

共1个回答

热心网友时间：2022-06-25 14:32

<?php function unique_arr($array2D,$stkeep=false,$ndformat=true){ // 判断是否保留一级数组键 (一级数组键可以为非数字) if($stkeep) $stArr = array_keys($array2D); // 判断是否保留二级数组键 (所有二级数组键必须相同) if($ndformat) $ndArr = array_keys(end($array2D)); //降维,也可以用implode,将一维数组转换为用逗号连接的字符串 foreach ($array2D as $v){ $v = join(",",$v); $temp[] = $v; } //去掉重复的字符串,也就是重复的一维数组 $temp = array_unique($temp); //再将拆开的数组重新组装 foreach ($temp as $k => $v) { if($stkeep) $k = $stArr[$k]; if($ndformat) { $tempArr = explode(",",$v); foreach($tempArr as $ndkey => $ndval) $output[$k][$ndArr[$ndkey]] = $ndval; } else $output[$k] = explode(",",$v); } return $output;} $arr = array( 0 => array ( 0 => 1, 1 => 2 ), 1 => array ( 0 => 1, 1 => 2 ), 2 => array ( 0 => 2, 1 => 3 ), 3 => array ( 0 => 2, 1 => 3 ), 4 => array ( 0 => 3, 1 => 4 ), 5 => array ( 0 => 3, 1 => 4 ),);var_mp( array_values(unique_arr( $arr )) );