sizeof in PHP

PHP sizeof() function is used to count the elements from an array, or the properties of an object.
It is an alias to count() function.

Syntax:

sizeof(array,mode)

Parameters Description: 

array : Required. Determines the array or object count.
mode : Optional. Determines the mode of the function. Conceivable values:

• 0 -Default. Does not detect multidimensional arrays (arrays within arrays)
• 1 -Detects multidimensional arrays

Note : This parameter was added in PHP 4.2
Note : PHP sizeof() function may return 0 if a variable isn't set, but it may also return 0 if a variable contains an empty array.
           The isset() function can be used to test if a variable is set.

Example:

<?php
$daysarr = array( "Sunday","Monday","Tuesday","Wednesday","Thursday" );
$result= sizeof($daysarr);
echo $result;
?>

Output will be:

5