HTML | applet alt Attribute

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

HTML | applet alt Attribute

A

ashokjaiswal

Improve

Article Tags :

Similar Reads

PHP | is_double() Function

The is_double() function is an inbuilt function in PHP which is used to find whether the given value is a double or not. Syntax: bool is_double( $variable_name ) Parameters: This function accepts one parameter as mentioned above and described below: $variable_name: This parameter holds the value whi

PHP | is_callable() Function

The is_callable() function is an inbuilt function in PHP which is used to verify the contents of a variable can be called as a function. It can check that a simple variable contains the name of a valid function, or that an array contains a properly encoded object and function name. Syntax: bool is_c

PHP count() Function

The count() function in PHP is used to count the number of elements in an array or the countable properties of an object. The function returns an integer value representing the number of items present. Syntax: count($array, mode)In this syntax: $array (mandatory): Refers to the array, whose elements

PHP mhash_count() Function

The mhash_count() function is an inbuilt function in PHP which is used to Gets the highest available hash ID within the current MHash installed in system like SHA1, MD% etc. It takes zero input parameter and returns an integer value. Syntax: int mhash_count( void ) Parameter: This function does not

PHP | is_a() function

The is_a() is a built-in function in PHP and is used to check whether a given object is of a given class or not. It also checks if the given class is one of the parents of the given object or not. Syntax: boolean is_a($object, $class) Parameters: This function accepts two parameters as shown in the

PHP is_file( ) Function

The is_file() function in PHP is an inbuilt function which is used to check whether the specified file is a regular file or not. The name of the file is sent as a parameter to the is_file() function and it returns True if the file is a regular file else it returns False. Syntax: bool is_file($file)

PHP is_float() Function

PHP is_float() is an inbuilt function in PHP. The is_float() function is used to find whether a variable is a float or not. Syntax: boolean is_float($variable_name) Parameter: This function contains a single parameter as shown in the above syntax and described below $variable_name: the variable we w

PHP iterator_count() Function

The iterator_count() function is an inbuilt function in PHP that is used to count the number of elements in an iterator. An iterator is an object that is a collection of elements. Syntax: iterator_count(Traversable $iterator) : intParameters: This function accepts only one parameter which is describ

PHP | Ds\Map count() Function

The Ds\Map::count() function is an inbuilt function in PHP which is used to count the number of elements present in the Map. It also referred to the size of the Map. Syntax: int public Ds\Map::count() Parameters: This function does not accept any parameter. Return value: This function returns the nu

PHP | SplHeap count() Function

The SplHeap::count() function is an inbuilt function in PHP which is used to count the elements in the heap. Generally, Heap can be of two types: Max-Heap: In a Max-Heap the key present at the root node must be greatest among the keys present at all of its children. The same property must be recursi