how to pad comma separated string with php?
<p>I have a variable with the following value:<br>
<code>1,2,11,17,2</code><br>
I need to convert it to:<br>
<code>SER1, SER2, SER11, SER17, SER2</code><br>
In other words I need to pad to the left of each number the words <code>SER</code><br>
How to accomplish this with PHP?</p>
