php生成二维码

$urlToEncode="https://www.jb51.net"; 
generateQRfromGoogle($urlToEncode); 
/** 
 * google api 二维码生成【QRcode可以存储最多4296个字母数字类型的任意文本，具体可以查看二维码数据格式】 
 * @param string $chl 二维码包含的信息，可以是数字、字符、二进制信息、汉字。 
 不能混合数据类型，数据必须经过UTF-8 URL-encoded 
 * @param int $widhtHeight 生成二维码的尺寸设置 
 * @param string $EC_level 可选纠错级别，QR码支持四个等级纠错，用来恢复丢失的、读错的、模糊的、数据。 
 *    L-默认：可以识别已损失的7%的数据 
 *    M-可以识别已损失15%的数据 
 *    Q-可以识别已损失25%的数据 
 *    H-可以识别已损失30%的数据 
 * @param int $margin 生成的二维码离图片边框的距离 
 */ 
function generateQRfromGoogle($chl,$widhtHeight ='150',$EC_level='L',$margin='0') 
{ 
 $chl = urlencode($chl); 
 echo '<img src="http://chart.apis.google.com/chart?chs='.$widhtHeight.'x'.$widhtHeight.' 
 &cht=qr&chld='.$EC_level.'|'.$margin.'&chl='.$chl.'" alt="QR code" widhtHeight="'.$widhtHeight.' 
 " widhtHeight="'.$widhtHeight.'"/>'; 
} 

public static function png($text, $outfile=false, $level=QR_ECLEVEL_L, $size=3, $margin=4, 
$saveandprint=false) 
{ 
 $enc = QRencode::factory($level, $size, $margin); 
 return $enc->encodePNG($text, $outfile, $saveandprint=false); 
} 

include 'phpqrcode.php'; 
QRcode::png('https://www.jb51.net'); 

include 'phpqrcode.php'; 
$value = 'https://www.jb51.net'; //二维码内容 
$errorCorrectionLevel = 'L';//容错级别 
$matrixPointSize = 6;//生成图片大小 
//生成二维码图片 
QRcode::png($value, 'qrcode.png', $errorCorrectionLevel, $matrixPointSize, 2); 
$logo = 'logo.png';//准备好的logo图片 
$QR = 'qrcode.png';//已经生成的原始二维码图 
if ($logo !== FALSE) { 
 $QR = imagecreatefromstring(file_get_contents($QR)); 
 $logo = imagecreatefromstring(file_get_contents($logo)); 
 $QR_width = imagesx($QR);//二维码图片宽度 
 $QR_height = imagesy($QR);//二维码图片高度 
 $logo_width = imagesx($logo);//logo图片宽度 
 $logo_height = imagesy($logo);//logo图片高度 
 $logo_qr_width = $QR_width / 5; 
 $scale = $logo_width/$logo_qr_width; 
 $logo_qr_height = $logo_height/$scale; 
 $from_width = ($QR_width - $logo_qr_width) / 2; 
 //重新组合图片并调整大小 
 imagecopyresampled($QR, $logo, $from_width, $from_width, 0, 0, $logo_qr_width, 
 $logo_qr_height, $logo_width, $logo_height); 
} 
//输出图片 
imagepng($QR, 'jb51.png'); 
echo '<img src="jb51.png">'; 

<?php 
function UPCAbarcode($code) { 
 $lw = 2; $hi = 100; 
 $Lencode = array('0001101','0011001','0010011','0111101','0100011', 
   '0110001','0101111','0111011','0110111','0001011'); 
 $Rencode = array('1110010','1100110','1101100','1000010','1011100', 
   '1001110','1010000','1000100','1001000','1110100'); 
 $ends = '101'; $center = '01010'; 
 /* UPC-A Must be 11 digits, we compute the checksum. */ 
 if ( strlen($code) != 11 ) { die("UPC-A Must be 11 digits."); } 
 /* Compute the EAN-13 Checksum digit */ 
 $ncode = '0'.$code; 
 $even = 0; $odd = 0; 
 for ($x=0;$x<12;$x++) { 
 if ($x % 2) { $odd += $ncode[$x]; } else { $even += $ncode[$x]; } 
 } 
 $code.=(10 - (($odd * 3 + $even) % 10)) % 10; 
 /* Create the bar encoding using a binary string */ 
 $bars=$ends; 
 $bars.=$Lencode[$code[0]]; 
 for($x=1;$x<6;$x++) { 
 $bars.=$Lencode[$code[$x]]; 
 } 
 $bars.=$center; 
 for($x=6;$x<12;$x++) { 
 $bars.=$Rencode[$code[$x]]; 
 } 
 $bars.=$ends; 
 /* Generate the Barcode Image */ 
 $img = ImageCreate($lw*95+30,$hi+30); 
 $fg = ImageColorAllocate($img, 0, 0, 0); 
 $bg = ImageColorAllocate($img, 255, 255, 255); 
 ImageFilledRectangle($img, 0, 0, $lw*95+30, $hi+30, $bg); 
 $shift=10; 
 for ($x=0;$x<strlen($bars);$x++) { 
 if (($x<10) || ($x>=45 && $x<50) || ($x >=85)) { $sh=10; } else { $sh=0; } 
 if ($bars[$x] == '1') { $color = $fg; } else { $color = $bg; } 
 ImageFilledRectangle($img, ($x*$lw)+15,5,($x+1)*$lw+14,$hi+5+$sh,$color); 
 } 
 /* Add the Human Readable Label */ 
 ImageString($img,4,5,$hi-5,$code[0],$fg); 
 for ($x=0;$x<5;$x++) { 
 ImageString($img,5,$lw*(13+$x*6)+15,$hi+5,$code[$x+1],$fg); 
 ImageString($img,5,$lw*(53+$x*6)+15,$hi+5,$code[$x+6],$fg); 
 } 
 ImageString($img,4,$lw*95+17,$hi-5,$code[11],$fg); 
 /* Output the Header and Content. */ 
 header("Content-Type: image/png"); 
 ImagePNG($img); 
} 
?>