echo" //i need this echo;
<form class='form' action='zoom.php?img=<?php echo intval($_GET['img']);?>' method='post'> //i dont need echo in here

i also tired 
action='zoom.php?img= intval($_GET['img'])'

but no luck 

it give me syntar error every time

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$img = intval($_GET['img']);
echo "<form class='form' action='zoom.php?img=$img' method='post'>";
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