利用PHP生成二维码(转)

导读：在二维码广泛应用化的今天，在web站点中自动生成对应的二维码是最基础的需求。文章介绍了使用PHP自动生成二维码的三种方式。

get方法实现方式一：

$urlToEncode="163.com";

generateQRfromGoogle($urlToEncode);

function generateQRfromGoogle($chl,$widhtHeight ='150',$EC_level='L',$margin='0')  {

$url = urlencode($url);

return  '<img src="http://chart.apis.google.com/chart?chs='.$widhtHeight.'x'.$widhtHeight.'&cht=qr&    chld='.$EC_level.'|'.$margin.'&chl='.$chl.'" alt="QR code" widhtHeight="'.$size.'" widhtHeight="'.$size.'"/>';

}

post方法实现方式:

$width = 300;

$height = 300;

$string = "163.com";

function qrcode($width,$height,$string)

{

$post_data = array();

$post_data['cht'] = 'qr';

$post_data['chs'] = $width."x".$height;

$post_data['chl'] = $string;

$post_data['choe'] = "UTF-8";

$url = "http://chart.apis.google.com/chart";

$data_Array = array();

foreach($post_data as $key => $value)

{

$data_Array[] = $key.'='.$value;

}

$data = implode("&",$data_Array);

//echo $data;

$ch = curl_init();

curl_setopt($ch, CURLOPT_POST, 1);

curl_setopt($ch, CURLOPT_HEADER, 0);

curl_setopt($ch, CURLOPT_URL, $url);

curl_setopt($ch, CURLOPT_POSTFIELDS,$data);

curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

$result = curl_exec($ch);

//echo "<img src =\"data:image/png;base64,".base64_encode($result)."\" >"; 注意，不写header的写法

return $result;

}

header("Content-type:image/png");

echo qrcode($width,$height,$string);

2.利用php类库PHP QR Code来实现

首先下载类库包

地址：http://phpqrcode.sourceforge.net/

下载：http://sourceforge.net/projects/phpqrcode/

• API文档

• 详细的例子

<?

include "./phpqrcode/phpqrcode.php";

$value="http://www.weste.net";

$errorCorrectionLevel = "L";

$matrixPointSize = "4";

QRcode::png($value, false, $errorCorrectionLevel, $matrixPointSize);

exit;

?>