Detailed explanation of the steps for php to call the Google interface to generate a QR code

This time I will bring you a detailed explanation of the steps to generate a QR code by calling the google interface in php. , let’s take a look. Example, call the google interface to implement the QR code.

";
$chl = urlencode($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
//以下是二维码生成的主要代码
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, $logo_height); 
}
header('Content-type: image/png'); 
imagepng($QR);
//销毁二维码图像
imagedestroy($QR); 
?>

Recommended reading:

php generates random numbers, letters or numeric letters Mixed string

The above is the detailed content of Detailed explanation of the steps for php to call the Google interface to generate a QR code. For more information, please follow other related articles on the PHP Chinese website!