PHP - GENERATE QR CODE

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function qr_code($data, $type = "TXT", $size ='150', $ec='L', $margin='0')   {      $types = array("URL" =--> "http://", "TEL" => "TEL:", "TXT"=>"", "EMAIL" => "MAILTO:");     if(!in_array($type,array("URL", "TEL", "TXT", "EMAIL")))     {         $type = "TXT";     }     if (!preg_match('/^'.$types[$type].'/', $data))     {         $data = str_replace("\\", "", $types[$type]).$data;     }     $ch = curl_init();     $data = urlencode($data);     curl_setopt($ch, CURLOPT_URL, 'http://chart.apis.google.com/chart');     curl_setopt($ch, CURLOPT_POST, true);     curl_setopt($ch, CURLOPT_POSTFIELDS, 'chs='.$size.'x'.$size.'&cht=qr&chld='.$ec.'|'.$margin.'&chl='.$data);     curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);     curl_setopt($ch, CURLOPT_HEADER, false);     curl_setopt($ch, CURLOPT_TIMEOUT, 30);       $response = curl_exec($ch);       curl_close($ch);     return $response; }

Syntax

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<?php header("Content-type: image/png"); echo qr_code("http://koonk.com", "URL"); ?>