spl_classes
File Handling
SPL Functions
PHP Manual

# spl_object_hash

(PHP 5 >= 5.2.0)

spl_object_hash — Return hash id for given object

### Description

string spl_object_hash ( object `$obj` )

This function returns a unique identifier for the object. This id can be used as a hash key for storing objects or for identifying an object.

### Parameters

`object`

  Any object.

### Return Values

A string that is unique for each currently existing object and is always the same for each object.

### Examples

Example #1 A spl_object_hash() example

`<?php
$id = spl_object_hash($object);
$storage[$id] = $object;
?>`

### Notes

> Note:

> When an object is destroyed, its hash may be reused for other objects.

spl_classes
File Handling
SPL Functions
PHP Manual