PHP three-dimensional array deduplication (sample code)_PHP tutorial

Suppose the array is called $my_array;

Copy the code The code is as follows:

// Create a new empty array.
$tmp_array = array();

$new_array = array();

// 1. Loop out all the rows. ($val is a certain row)
foreach($my_array as $k => $val){

$hash = md5(json_encode($val));
if (in_array($hash, $tmp_array)) {
echo('This line already exists');
}else {
// 2. In the body of the foreach loop, assign the hash of each row of array object to the temporary array.
$tmp_array[] = $hash;
$new_array[] = $ val;
}
}

print_r($new_array);

$new_array is the filtered array without duplicate data.

http://www.bkjia.com/PHPjc/825203.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/825203.htmlTechArticleAssume the array is called $my_array; copy the code as follows: // Create a new empty array. $tmp_array = array( ); $new_array = array(); // 1. Loop out all the rows. ($val is a certain row)...