How to convert string to symbol in PHP
<p>How to convert a password string to specified symbol like <code>*</code> or something else.</p>

<p>I'm currently working on change password page.
I would like to display the password to page, and i want to avoid the password overlook by someone, so i want to covert the password's string to symbol like <code>*</code> with same lengths.
An example like <code>&lt;input type="password" /&gt;</code>.</p>

<p>Sorry for my bad english...</p>
