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Is there any links?

Yes, there is! Since the 0.1.2 version we have a LINK element inside the COL element, with these attributes:

name mandatory values meaning
TYPE yes STATIC/DYNAMIC If its STATIC, the link will follow the value inside the LINK element. If its DYNAMIC, the link will follow the value of a SQL result field.
TARGET no <target value (string)> The target frame where the link will open. If its null, it will open on the same window where the report is. If its "_blank", for example, it will open on a new window. Check the TARGET attribute on the HTML <A HREF> element for learn more about this.
TITLE no <title value (string)> The title value is like the "tooltip" that appears when you put your mouse over the link.

For this sample I'll use the sales7.php file, because we'll create a new column called url with the address of a website querying the current id field of the SQL query (http://www.mysite.com/customers.php?id=<sql_id_here>), like this (remember I'm using MySQL):

select id,name,city,product,value,concat('http://www.mysite.com/customers.php?id=',id) as url from saleslog order by city,id;

The url column will have values like http://www.mysite.com/customers.php?id=1 and so on.
Now let's see sales7.xml: 
<?xml version="1.0" encoding="ISO-8859-1" standalone="no"?>
<!DOCTYPE REPORT SYSTEM "PHPReport.dtd">
<REPORT>
   <TITLE>Sales Report</TITLE>
   <BACKGROUND_COLOR>#FFFFFF</BACKGROUND_COLOR>
   <CSS>phpreports.css</CSS>
   <DOCUMENT>
      <FOOTER BORDER="1" CELLSPACING="0" CELLPADDING="5" WIDTH="500">
         <ROW>
            <COL ALIGN="RIGHT" CELLCLASS="DOCUMENT_LAYER" WIDTH="430">report total</COL>
            <COL ALIGN="LEFT" CELLCLASS="DOCUMENT_LAYER" TEXTCLASS="BOLD" NUMBERFORMATEX="2" TYPE="EXPRESSION">$this->getSum("value")</COL>
         </ROW>
      </FOOTER>		
   </DOCUMENT>
   <PAGE BORDER="1" SIZE="25" CELLSPACING="0" CELLPADDING="5" WIDTH="500">
      <HEADER>
         <ROW>
            <COL COLSPAN="4" CELLCLASS="PAGE_LAYER" TEXTCLASS="BOLD">John Doe Enterprises</COL>
         </ROW>
         <ROW>
            <COL COLSPAN="4" CELLCLASS="PAGE_LAYER" TEXTCLASS="BOLD">Sales Report</COL>
         </ROW>
      </HEADER>		
      <FOOTER>
         <ROW>
            <COL ALIGN="RIGHT" COLSPAN="3" CELLCLASS="PAGE_LAYER">page total</COL>
            <COL ALIGN="LEFT" NUMBERFORMATEX="2" CELLCLASS="PAGE_LAYER" TEXTCLASS="BOLD" TYPE="EXPRESSION">$this->getSum("value")</COL>
         </ROW>
      </FOOTER>		
   </PAGE>
   <GROUPS>
      <GROUP NAME="citygroup" EXPRESSION="city">
         <HEADER>
            <ROW>
               <COL CELLCLASS="GROUP_LAYER">
                  <LINK TYPE="STATIC" TITLE="search cities here" TARGET="_blank">http://www.citysearch.com</LINK>city:
               </COL>
               <COL CELLCLASS="GROUP_LAYER" TEXTCLASS="BOLD" TYPE="EXPRESSION" COLSPAN="3">$header->getValue("city")</COL>
            </ROW>
            <ROW>
               <COL CELLCLASS="GROUP_LAYER">id</COL>
               <COL CELLCLASS="GROUP_LAYER">name</COL>
               <COL CELLCLASS="GROUP_LAYER">product</COL>
               <COL CELLCLASS="GROUP_LAYER">$</COL>
            </ROW>
         </HEADER>
         <FOOTER>
            <ROW>
               <COL ALIGN="RIGHT" COLSPAN="3" CELLCLASS="GROUP_LAYER">city total</COL>
               <COL ALIGN="LEFT" CELLCLASS="GROUP_LAYER" TEXTCLASS="BOLD" NUMBERFORMATEX="2" TYPE="EXPRESSION">$this->getSum("value")</COL>
            </ROW>
         </FOOTER>
         <GROUP NAME="customergroup" EXPRESSION="name">
            <FOOTER>
               <ROW>
                  <COL ALIGN="RIGHT" COLSPAN="3" CELLCLASS="GROUP_LAYER">customer total</COL>
                  <COL ALIGN="LEFT" CELLCLASS="GROUP_LAYER" TEXTCLASS="BOLD" NUMBERFORMATEX="2" TYPE="EXPRESSION">$this->getSum("value")</COL>
               </ROW>
            </FOOTER>
            <FIELDS>
               <ROW>
                  <COL CELLCLASS="GROUP_LAYER">
                     <LINK TYPE="DYNAMIC" TITLE="click here for more info about this customer" TARGET="_blank">url</LINK>id
                  </COL>
                  <COL CELLCLASS="GROUP_LAYER">
                     <LINK TYPE="STATIC" TITLE="search this customer name">http://www.mysite.com/customernames.php</LINK>name
                  </COL>
                  <COL TYPE="FIELD" CELLCLASS="GROUP_LAYER">product</COL>
                  <COL TYPE="FIELD" CELLCLASS="GROUP_LAYER" NUMBERFORMATEX="2">value</COL>
               </ROW>
            </FIELDS>
         </GROUP>
      </GROUP>
   </GROUPS>
</REPORT>
Look the first highlighted piece of code - there is a STATIC link there, with a TITLE and a TARGET attributes. Translating it: this link always (it's static!) will point to http://www.citysearch.com, it will open on a new window, and everytime you put your mouse over this link a tooltip with "search cities here will appears.
The second piece of highlighted code is a DYNAMIC link - where we'll put the url SQL field value, and it will change according with the values of our database table. Noticed that there is a TITLE and a TARGET attributes there also - its behaviour is the same explained above.

The result is:

sales.xml result file

Note the underlined links there - city, id and name have it all, city and name with static ones and id changing as the customer id changes (http://www.mysite.com/customers.php?id=1,http://www.mysite.com/customers.php?id=2 and http://www.mysite.com/customers.php?id=3).

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