How to remove duplicate values ​​from a two-dimensional array in PHP_PHP Tutorial

PHP array has a built-in function array_unique() for removing duplicate items, but PHP's array_unique function only applies to one-dimensional arrays, not multi-dimensional arrays. The following provides an array_unique function for a two-dimensional array.

I wrote an article about array deduplication before, but it was limited to one-dimensional arrays. The following functions can be used for two-dimensional arrays:

//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;
}

If you want to retain the key values ​​of the array, you can use the following function:

//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
		$temp2[$k]["id"] =$array[0];   
		$temp2[$k]["litpic"] =$array[1];
		$temp2[$k]["title"] =$array[2];
		$temp2[$k]["address"] =$array[3];
		$temp2[$k]["starttime"] =$array[4];
		$temp2[$k]["endtime"] =$array[5];
		$temp2[$k]["classid"] =$array[6];
		$temp2[$k]["ename"] =$array[7];
	}
    return $temp2;
}

That’s probably it.

http://www.bkjia.com/PHPjc/752357.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/752357.htmlTechArticlePHP array has a built-in function array_unique() to remove duplicate items, but php's array_unique function only applies to one-dimensional arrays , is not applicable to multi-dimensional arrays. The following provides a two-dimensional array...