PHP base------Array Filtering

Array_filter (); Filter arrays

Grammar:

Array_filter (array,callbackfunction);

Array must be written, specify the arrays to filter

Callbackfunction must be written to specify the callback function to use.

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. The array key name remains unchanged.

<! DOCTYPE html>PHP function test_odd ($var) {return($var !== "a");} $a 1=array("A", "B", 2,3,4); Print_r (array_filter($a 1, "test_odd")); ></body>

PHP base------Array Filtering