Two PHP methods to remove duplicates from a two-dimensional array, two PHP methods to remove two-dimensional arrays_PHP tutorial

Two PHP methods to remove duplicate values ​​from a two-dimensional array, two PHP methods to remove two-dimensional arrays

A summary of PHP methods to remove duplicate values ​​from a two-dimensional array, the specific code is as follows:
Method 1:

//二维数组去掉重复值
function array_unique_fb($array2D){
 foreach ($array2D as $v){
  $v=join(',',$v); //降维,也可以用implode,将一维数组转换为用逗号连接的字符串
  $temp[]=$v;
 }
 $temp=array_unique($temp); //去掉重复的字符串,也就是重复的一维数组
 foreach ($temp as $k => $v){
  $temp[$k]=explode(',',$v); //再将拆开的数组重新组装
 }
 return $temp;
}

Method 2:

//二维数组去掉重复值,并保留键值
function array_unique_fb($array2D){
 foreach ($array2D as $k=>$v){
  $v=join(',',$v); //降维,也可以用implode,将一维数组转换为用逗号连接的字符串
  $temp[$k]=$v;
 }
 $temp=array_unique($temp); //去掉重复的字符串,也就是重复的一维数组 
 foreach ($temp as $k => $v){
  $array=explode(',',$v); //再将拆开的数组重新组装
  //下面的索引根据自己的情况进行修改即可
  $temp2[$k]['id'] =$array[0];
  $temp2[$k]['title'] =$array[1];
  $temp2[$k]['keywords'] =$array[2];
  $temp2[$k]['content'] =$array[3];
 }
 return $temp2;
}

Two PHP methods for removing duplicates from two-dimensional arrays, each has its own advantages and disadvantages. You can choose according to the specific situation.

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