PHP array_filter() Function with Example

PHP array_filter() Function: Here, we will find out about the array_filter() work with example in PHP. PHP array_filter() Function array_filter() work is utilized to apply a channel on cluster components dependent on the capacity and returns the exhibit with separated components, it acknowledges an exhibit to be checked and a callback work. The callback work is utilized to approve the components in the cluster. Syntax: array_filter(array,callback_function) : array Here, the exhibit is the info cluster in which we need to apply the channel. callback_function is the capacity, wherein we compose the condition to be approved. Example: Input: $arr = array(10, 20, -10, -20, 50, 0); //here we have to filter the positive numbers //the callback function to check the positive number is "isPositive()" Function calling: $temp = array_filter($arr, "isPositive"); Output: Array ( [0] => 10 [1] => 20 [4] => 50 ) So, here 0th , 1st and 4th elements are positive PHP code 1: Find the positive number from a given cluster of the numbers. 0) return $val; } // array $arr = array(10, 20, -10, -20, 50, 0); // array with only positive value $temp = array_filter($arr, "isPositive"); print_r ($temp); ?> Output: Array ( [0] => 10 [1] => 20 [4] => 50 ) PHP code 2: Find the people who are qualified for casting a ballot from a given exhibit of people Here, we likewise have the "keys" and dependent on the age key we are checking the democratic qualification. =18) return $val; } // person's array $arr = array( array("name" => "Kishan", "age" => 24,"city" => "Bilaspur",), array("name" => "Durgesh", "age" => 27,"city" => "Raipur",), array("name" => "Aakash", "age" => 44,"city" => "Delhi",), array("name" => "Prakash", "age" => 17,"city" => "Goa",), ); // array with voting eligible persons $temp = array_filter($arr, "isVoter"); print_r ($temp); ?> Output: Array ( [0] => Array ( [name] => Kishan [age] => 24 [city] => Bilaspur ) [1] => Array ( [name] => Durgesh [age] => 27 [city] => Raipur ) [2] => Array ( [name] => Aakash [age] => 44 [city] => Delhi ) )