you locate a string position by using arrays $fourth = $str[3];  then use the str_replace function <br><br><div class="gmail_quote">On Mon, Oct 25, 2010 at 8:12 PM, Erick Njenga <span dir="ltr">&lt;<a href="mailto:eriknjenga@gmail.com">eriknjenga@gmail.com</a>&gt;</span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Anyone got an idea of an internal PHP function that would enable me to insert a symbol e.g. &#39;-&#39; after every 4 characters in a String? e.g. 12345678 becomes 1234-5678.<br clear="all">
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</span></div><div><span style="background-color:rgb(255, 255, 255)">Thanks and Regards,</span><br style="background-color:rgb(255, 255, 255);color:rgb(102, 102, 102)"><span style="background-color:rgb(255, 255, 255)"><font color="#666666">Erick Njenga Nyachwaya,</font></span></div>


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