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PHP count() function with example

PHP count() function: Here, we are going to learn about the count() function with example in PHP?
Submitted by IncludeHelp, on February 14, 2019

PHP count() function

"count() function" is used to get the total number of elements of an array.

Syntax:

    count(array, [count_mode])

Here,

• array is the name of an input array
• count_mode is an optional parameter and it's default value is 0, it has two values
  0 – It does not count all elements of a multidimensional array
  1 – It counts all elements of a multidimensional array

Examples:

    Input:
    $arr1 = array("101", "102", "103", "104", "105");

    Output:
    arr1 has 5 elements

PHP code: Using single dimensional array

<?php    
    $arr1 = array("101", "102", "103", "104", "105");
    $arr2 = array("Amit", "Abhishek", "Prerana", "Aleesha", "Prem");
	
	$len = count($arr1);
	print ("arr1 has $len elements\n");
	$len = count($arr2);
	print ("arr2 has $len elements\n");	
?>

Output

arr1 has 5 elements
arr2 has 5 elements

PHP code: Using multidimensional array

<?php    
    $students = array(
        "101" => array(
                "name" => "Amit",
                "age" => 21,
            ),
        "102" => array(
                "name" => "Abhi",
                "age" => 20,
            )
        );

    $len = count($students);
    print ("count value = $len (count_mode is not provided)\n");

    $len = count($students, 0);
    print ("count value = $len (count_mode is set to 0)\n");    
    
    $len = count($students, 1);
    print ("count value = $len (count_mode is set to 1)\n");    
?>

Output

count value = 2 (count_mode is not provided)
count value = 2 (count_mode is set to 0)
count value = 6 (count_mode is set to 1)