How to delete null values ​​in an array in php

php method to delete null values ​​​​in an array: You can use the array_filter() function to achieve this. The array_filter() function uses a callback function to filter elements in the array. The specific usage method is as follows: [array_filter($array)].

#You can use the array_filter() function to delete null values ​​​​in the array.

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array_filter() function uses a callback function to filter the 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, and the array key name remains unchanged.

Syntax:

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

Parameters:

• ##array Required. Specifies the array to filter.

• callback Optional. Specifies the callback function to be used.

• #flag Optional. Determines the form of parameters received by callback.

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Code implementation:

 "abc", 'b' => "bcd",'c' =>"cde",'d' =>"def",'e'=>"");
    $b= array_filter($array);

    print_r($b);
?>

Output result:

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

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