The sizeof() function in PHP is an alias of count() function. The sizeof() function counts elements in an array, or properties in an object. It returns the number of elements in an array.
Syntax
sizeof(arr, mode)
Parameters
arr − The specified array.
mode − Specifies the mode. Possible values are 0 or 1. 0: Do not count all the elements, 1: Count all the elements.
Return
The sizeof() function returns the number of elements in an array.
Example
The following is an example −
<?php
$students = array("Jack","Peter", "Anne","David");
echo sizeof($students);
?>Output
The following is the output −
4