The is_countable() function is an inbuilt function in PHP which is used to check whether the content of the variable is countable or not.
Syntax:
bool is_countable ( mixed $var )
Parameters: This function accepts one parameter as mentioned above and described below:
- $var: This parameter holds the value which need to be checked.
Return Value: This function returns a boolean value i.e. either True if value of variable is countable otherwise returns False.
Below programs illustrate the is_countable() function in PHP:
Program 1:
<?php // Declare a string $str = "neveropen"; var_dump(is_countable($str)); $arr = array(1, 3, 5, 7); var_dump(is_countable($arr)); ?> |
Output:
bool(false) bool(true)
Program 2:
<?php // Declare a number $num = 1234; var_dump(is_countable($num)); // Declare an array $arr = array('Welcome', 'to', 'neveropen'); var_dump(is_countable($arr)); // Declare a string $str = "neveropen"; var_dump(is_countable($str)); // Declare an empty class class GFG { // Empty class } // Create an object of class $obj = new GFG(); var_dump(is_countable($obj)); // Create an array iterator object $itr = new ArrayIterator(); var_dump(is_countable($itr)); ?> |
Output:
bool(false) bool(true) bool(false) bool(false) bool(true)
Reference: https://www.php.net/manual/en/function.is-countable.php
