The method by which PHP deletes specific array content and rebuilds the array index.

Copy Code code as follows:
$a = Array (' A ', ' B ', ' C ', ' d ');
Unset ($a [2]);
Print_r ($a);

But the biggest disadvantage of this approach is that the array index is not rebuilt.

After checking the data, PHP provides this functionality. It's just indirect.

This function is Array_splice.

For ease of use. I encapsulated it into a function. Convenient for everyone to use.
Copy Code code as follows:
Function Array_remove (& $arr, $offset) {
Array_splice ($arr, $offset, 1);
}
$a = Array (' A ', ' B ', ' C ', ' d ');
Array_remove ($a, 2);
Print_r ($a);

After testing, you can tell. 2 the location of this element was actually deleted. and the index was reset.