PHP 8 digit number question
<p>How to make a number 8 digit as standard digit. The number will be get to a user id from database.
Example</p>

<pre><code>user_id = 1 // This should should be echo as 00000001
user_id = 11 // This should should be echo as 00000011
user_id = 111 // This should should be echo as 00000111
</code></pre>

<p>How can I code this? Please help thanks.</p>
