The **`get_resource_id` method** can be used to get the resource ID of the specific resource. This method is introduced in PHP 8. 

In PHP, the resource denotes a reference to an external resource. For example, a resource variable can point to a file. You must assign a specific integer ID -- called the resource ID -- to each resource PHP. 


#      
#  Syntax

```
get_resource_id(resource $resource): int
```

This method returns an `int` value. 

##    
## Example

<?php 
  $res = tmpfile();
  echo "The resource id of the temporary file is :";
  echo get_resource_id($res) + "\n";
?>

#     
## Output
```terminal
The resource id of the temporary file is : 543
```

In the code above, 

* We have created a temporary file using the `tmpfile` method. 

* We have used the `get_resource_id` method to get the resource identifier number of the resource.

What is the get_resource_id() method in PHP?

Introduced in PHP 8, the `get_resource_id()` method retrieves the integer ID of a resource, such as files.