The **`sizeof()`** method is used to find the number of elements present in an array or any #key# Countable object: Classes implementing Countable #key#.

# 
#  Syntax

---
``` php
int sizeof(array, mode);
```
---

##
## Arguments

* `array`: The array for which the number of elements is to be determined.

* `mode`: An optional argument that specifies how values are counted. `mode` has two possible values:

  * `COUNT_NORMAL` or `0`: Only the first level elements are counted in a multi-dimensional array.  

  * `COUNT_RECURSIVE` or `1`: All the elements in a multi-dimensional array are recursively counted.

---
> The default value for the `mode` argument is `COUNT_NORMAL`.

<?php
   $arr = array(1,2,3,4,5);
   $result = sizeof($arr);
   print($result);
?>

## 
### Explanation 

In the code above, we create an array and call the `sizeof()` method on the array, which will return the size of the array. In our case, the `sizeof()` method will return `5`.


<?php
$array = array(
                'odd' => array(1,3,5),
                'even' => array(2,4,6)
                );
  
// normal count
echo "Normal count of array  : ";
print(sizeof($array, COUNT_NORMAL )); // output 2

echo "\nRecursive count of array  : ";
//recursive count
print(sizeof($array, COUNT_RECURSIVE)); // output 8
  
?>

## 
### Explanation 

In the code above, we create a multi-dimensional array. 

---
```
sizeof($array, COUNT_NORMAL )
```
---

We call the `sizeof()` method with `COUNT_NORMAL` as the value for the `mode` argument. This will only count the number of elements in a single level. So, we will get `2` as a result.

---
```
sizeof($array, COUNT_RECURSIVE)
```
---

We call the `sizeof()` method with `COUNT_RECURSIVE` as the value for the `mode` argument. This will count the number of elements in an array recursively. So, we will get `8` as a result.

What is the sizeof() method in PHP?

sizeof() in PHP determines element counts in arrays or Countables, with modes COUNT_NORMAL and COUNT_RECURSIVE.

What is the sizeof() method in PHP?

Syntax

Arguments

Code

Example 1

Explanation

Example 2

Explanation