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PHP | is_iterable() Function

Last Updated : 27 Apr, 2020
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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 
<?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 
<?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

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