PHP three-dimensional array de-weight (sample code) _php Tutorial

Suppose that the array is called $my _array;
Copy CodeThe code is as follows:
Creates a new, empty array.
$tmp _array = Array ();

$new _array = Array ();

1. Loops out all the rows. ($val is a row)
foreach ($my _array as $k = + $val) {

$hash = MD5 (Json_encode ($val));
if (In_array ($hash, $tmp _array)) {
Echo (' This line has been over ');
}else{
2. In the body of the Foreach loop, the hash of each array object is assigned to that temporary array.
$tmp _array[] = $hash;
$new _array[] = $val;
}
}

Print_r ($new _array);

$new _array is a filtered array of data that is not duplicated.

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