php生成二维码的几种方式

php生成二维码的几种方式，都经测试通过
1.利用google开放接口
 get方法实现方式一：
 

PHP Code 复制内容到剪贴板

//api参数简要说明
//choe为编码，默认为utf-8
//数据大于2K请用post进行发送
/*
chld错误处理
L:默认，允许恢复7%的数据丢失
M：允许15%
Q：允许25%
H：允许30%
*/
$urlToEncode="http://9streets.cn";
generateQRfromGoogle($urlToEncode);
function generateQRfromGoogle($chl,$widhtHeight ='150',$EC_level='L',$margin='0')
{
 $url = urlencode($url);
 echo '<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:
 

PHP Code 复制内容到剪贴板

$width = 300;
$height = 300;
$string = "测试啦啦啦啦啦";
function qrcode($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/
 

PHP Code 复制内容到剪贴板

<?
include "./phpqrcode/phpqrcode.php";
$value="http://www.weste.net";
$errorCorrectionLevel = "L";
$matrixPointSize = "4";
QRcode::png($value, false, $errorCorrectionLevel, $matrixPointSize);
exit;
?>