PHP array Getting Started Tutorial Array_keys () function

This article describes the use of the Array_keys () function in the PHP array, as required by a friend reference. In the PHP array function, the Array_keys () function returns an array that contains all the keys found in the searched array. The form is as follows: Array Array_keys (array array[,mixed search_value]) If the optional parameter search_value is included, only the key that matches the value is returned. example, will output all the arrays found in the $fruit array: Apple [1] = banana [2] = watermelon)?>

