How to re-index deleted elements in php array, php array element index_PHP tutorial

How to re-index deleted elements in php array, php array element index

If you want to delete an element in an array, you can directly use unset, but what I saw today surprised me

So how can the missing elements be filled and the array re-indexed? The answer is

array_splice():

After print_r($arr), the result is A(www.jb51.net)rray ( [0] => a [1] => c [2] => d )

Delete the specified element from the array

array_search() is more practical

The array_search() function is the same as in_array(), searching for a key value in the array. If the value is found, the key of the matching element is returned. If not found, return false

But if you want to re-index the array, you need to use foreach to traverse the deleted array and then re-create an array. This is also possible.

array_values() returns all the values ​​in the input array and indexes them numerically.

array_value($arr['date']);

Solution 1: Create a new array:

$newArr = array();

foreach($arr as $key=>$value){
$newArr[] = $value ;

}

Solution 2: Sort
sort($arr);