How to remove null values ​​​​from an array in php

To remove null values ​​​​in the array, you can consider using the array_filter() function.

Function introduction:

array_filter() function uses a callback function to filter elements in the array.

This function passes each key value in the input array to the callback function. If the callback function returns true, the current key value in the input array is returned to the result array. Array key names remain unchanged.

Grammar format:

array array_filter ( array $array [, callable $callback [, int $flag = 0 ]] )

Code example:

<?php
    $array = array(&#39;a&#39; => "abc", &#39;b&#39; => "bcd",&#39;c&#39; =>"cde",&#39;d&#39; =>"def",&#39;e&#39;=>"");
    $b= array_filter($array);

    print_r($b);
?>

Output result:

Array (
[a] => abc
[b] => bcd
[c] => cde
[d] => def
)

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