How to delete empty elements from array in php

php method to delete empty elements from an array

There are many ways to remove empty elements from an array in PHP, but There is a system function that is the most convenient:

array_filter (参数1，参数2);

This function passes each value in the "Parameter 1" array to the "Parameter 2" function in turn. If the "Parameter2" function returns TRUE, the current value of the "Parameter1" array will be included in the returned result array. The key names of the array remain unchanged.

If you only need to remove empty elements in the array, parameter 2 can be omitted and included in the array:

$arr1=array( "a" => 1 , "b" => 0 , "c" => 3 , "d" => "" , "e" => 5 ,"f"=>array()); //执行 $arr1=array_filter ($arr1); //结果为 array( "a" => 1 , "c" => 3 , "e" => 5 );

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