JavaScript template code inside PHP -

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i have template system gets info table of database. example <%=flight.flightnum%> shows flight number. it's made way parse info javascript popup window on google map.

i want able add inside php code error getting parse error: syntax error, unexpected '<' on line 137.

line 137 is.

if((<%=flight.flightnum%> > 3000) && (<%=flight.flightnum%> < 3499))

i assuming doesn't template code inside php tags. how can put them inside php tags? thinking pass javascript output php variable $flight or something, possible?

this code want achieve.

    <?php         if((<%=flight.flightnum%> > 3000) && (<%=flight.flightnum%> < 3499))         {             echo '<center><img src="'.site_url.'/lib/skins/airline/images/divisions/regional.png"></center><br/>';         }         else if((<%=flight.flightnum%> > 9900) && (<%=flight.flightnum%> < 9999))         {             echo '<center><img src="'.site_url.'/lib/skins/airline/images/divisions/cargo.png"></center><br/>';         }         else         {             echo '<center><img src="'.site_url.'/lib/skins/airline/images/divisions/main.png"></center><br/>';         }     ?>


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