PHP | is_iterable() Function

The is_iterable() function is an inbuilt function in PHP which is used to check whether the contents of a variable is an iterable value or not.

Syntax:

bool is_iterable( mixed $var )

Parameters: This function accepts single parameter as mentioned above and described below:

• $var: It contains the value of variable that need to be check.

Return Value: It returns TRUE if the value of variable is iterable, FALSE otherwise.

Program 1:

<?php

// Declare an array
$arr = array(1, 2, 3, 4, 5);

if(is_iterable($arr)) {
    echo "Array is iterable";
}
else {
    echo "Array is not iterable";
}

// Create a class
class GFG {
}

// Create an object
$obj = new GFG();

if(is_iterable($obj)) {
    echo "\nObject is iterable";
}
else {
    echo "\nObject is not iterable";
}
?>

Output:

Array is iterable
Object is not iterable

Program 2:

<?php

// Create a class
class GFG {
    public $Geek_name = "Welcome to GeeksforGeeks";
}

$obj = new GFG();
var_dump(is_iterable($obj));

$arr = array('G', 'e', 'e', 'k', 's');
var_dump(is_iterable($arr));

$num = 25;
var_dump(is_iterable($num));

$str = "GeeksforGeeks";
var_dump(is_iterable($str));

$bool = true;
var_dump(is_iterable($bool));
?>

Output:

bool(false) 
bool(true) 
bool(false) 
bool(false) 
bool(false) 

Reference: https://www.php.net/manual/en/function.is-iterable.php