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# zend_thread_id

(PHP 5)

zend_thread_id — Returns a unique identifier for the current thread

### Description

int zend_thread_id ( void )

This function returns a unique identifier for the current thread.

### Return Values

Returns the thread id as an integer.

### Examples

Example #1 zend_thread_id() example

`<?php
$thread_id = zend_thread_id();
echo 'Current thread id is: ' . $thread_id;
?>`

The above example will output something similar to:

    Current thread id is: 7864

### Notes

> Note:

> This function is only available if PHP has been built with ZTS (Zend Thread Safety) support and debug mode (--enable-debug).

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