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PHP | is_countable() Function

  • Last Updated : 21 Apr, 2020

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 = "GeeksforGeeks"
  
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
$arr = array('Welcome', 'to', 'GeeksforGeeks');
var_dump(is_countable($arr));
  
// Declare a string
$str = "GeeksforGeeks"
var_dump(is_countable($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




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