PHP calls google interface to generate QR code sample code

Google provides an interface for generating QR codes. Through the interface, we can generate QR codes, which is convenient and fast.

Interface address http://chart.apis.google.com/chart?chs=width and height value x width and height value&cht=qr&chld=level|margin&chl=content

Parameter description :

Width and height values: Generate QR code size, the unit is pixels. The currently generated QR codes are all square, so both width and height values ​​are set to the same value

Level: four levels, L-default: can identify 7% of data that has been lost; M-can identify 15% of data that has been lost; Q-can identify 25% of data that has been lost; H-can identify 30% of data that has been lost Data

Margin: The distance between the generated QR code and the picture border

Content: The content of the generated QR code, but it must be urlEncode

<?php 
$data = isset($_GET[&#39;t&#39;]) ? $_GET[&#39;t&#39;] : &#39;http://www.XXX.com&#39;; 
$size = isset($_GET[&#39;size&#39;]) ? $_GET[&#39;size&#39;] : &#39;150x150&#39;; 
$logo = isset($_GET[&#39;logo&#39;]) ? $_GET[&#39;logo&#39;] :"./image/logo.jpg"; 

$chl = urlencode($logo); 
$png = "http://chart.googleapis.com/chart?chs=$size&cht=qr&chl=$chl&chld=L|1&choe=UTF-8"; 
$QR = imagecreatefrompng($png);//外面那QR图 
if ($logo !== FALSE) { 
$logo = imagecreatefromstring(file_get_contents($logo)); 
$QR_width = imagesx($QR); 
$QR_height = imagesy($QR); 
$logo_width = imagesx($logo); 
$logo_height = imagesy($logo); 
$logo_qr_width = $QR_width/5; 
$scale = $logo_width/$logo_qr_width; 
$logo_qr_height = $logo_height/$scale; 
$from_width = ($QR_width-$logo_qr_width)/2; 
imagecopyresampled($QR, $logo, $from_width, $from_width, 0, 0, $logo_qr_width, $logo_qr_height, $logo_width, $logo_height); 
} 
header(&#39;Content-type: image/png&#39;); 
imagepng($QR); 

imagedestroy($QR); 
?>

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