How to count the number of non-empty elements in an array in php

php method to calculate the number of non-empty elements in an array: first use the array_filter() function to use the callback function to filter the elements in the array and return the filtered array; then use the count() function to count Just the number of elements in the filtered array.

array_filter() function uses the callback function to filter the elements in the array and returns the filtered array.

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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.

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. Determine the parameter form received by the callback: ARRAY_FILTER_USE_KEY - callback accepts the key name as the only parameter ARRAY_FILTER_USE_BOTH - callback accepts both key name and key value

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<?php
$arr = array(
1=>"11",
2=>"22",
3=>"33",
4=>""
);
print_r(count(array_filter($arr)));
?>

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