Decrement character with php
<p>Why is it that it's ok to increment character but not decrement with PHP?<br></p>

<p><strong>PHP</strong></p>

<pre><code>&lt;?php
    $a = "a";
    echo $a. "&lt;br&gt;";  //a
    echo ++$a. "&lt;br&gt;";  //b
    echo --$a. "&lt;br&gt;";  //b
&gt;
</code></pre>

<p>Is there a simple way as <code>--$a</code>to decrement a charrater?</p>

<p>There was a solution by using <code>chr</code>.</p>