How to clear empty array in php

php method to clear empty arrays: use the [array_filter()] function in the php code to remove the empty array, the syntax is [array_filter($array,$callback,$flag)].

php method to clear empty arrays:

In php, you can use "array_filter()" to clear empty arrays Array removal. The function of this function is to use the callback function to filter the units in the array. Its function syntax is "array_filter($array,$callback,$flag)". When using it, you only need to pass the array into the first parameter.

Sample code:

<?php
$arr = array(
    0=>&#39;cyy&#39;,
    1=>false,
    2=>-1,
    3=>null,
    4=>&#39;&#39;
);
print_r(array_filter($arr));

Output result:

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