PHP: sizeof() function

Last update on August 19 2022 21:51:16 (UTC/GMT +8 hours)

PHP: Count all elements in an array

The sizeof() function is used to count the elements of an array or the properties of an object. This function is an alias of count().

Version:

(PHP 4 and above)

Syntax:

sizeof(array_name, mode)

Parameters:

Name	Description	Required / Optional	Type
array_name	Specifies the array or object to count.	Required	Array
mode	Sets the mode of the function. Possible values : COUNT_RECURSIVE (or 1) Here the count() function counts the array recursively. This is useful for counting all the elements of a multidimensional array. The default value is 0.	Optional	Integer

Return value:

The number of elements in array_name.

Value Type: Array.

Example:

<?php
$a[0] = 'Language';
$a[1] = 'English';
$a[2] = 'Math';
$a[3] = 'Science';
$result = sizeof($a);
echo $result;
?>

Output:

Pictorial Presentation:

php function reference: sizeof() function

View the example in the browser

Practice here online :

See also

PHP Function Reference

Previous: shuffle
Next: sort

PHP: Tips of the Day

Filters the collection using the given callback

Example:

<?php
function tips_reject($items, $func)
{
  return array_values(array_diff($items, array_filter($items, $func)));
}

print_r(tips_reject(['Apple', 'Pear', 'Kiwi', 'Banana'], function ($item) {
  return strlen($item) > 4;
}));
?>

Output:

Array
(
    [0] => Pear
    [1] => Kiwi
)