做項目的時候經常會用到生成二維碼，今天總結一下利用php類庫PHP QR Code來實現,不需要裝額外的php擴展,首先下載類庫包地址：http://phpqrcode.sourceforge.net/
1，浏覽器輸出：
<?
include "phpqrcode/phpqrcode.php";
$value="http://";
$errorCorrectionLevel = "L";
$matrixPointSize = "8";
QRcode::png($value, false, $errorCorrectionLevel, $matrixPointSize);
exit;
?>
2，文件輸出二維碼
include('phpqrcode/phpqrcode.php');
// 二維碼數據
$data = 'http://';
// 生成的文件名
$filename = '1111.png';
// 糾錯級別：L、M、Q、H
$errorCorrectionLevel = 'L';
// 點的大小：1到10
$matrixPointSize = 4;
QRcode::png($data, $filename, $errorCorrectionLevel, $matrixPointSize, 2);
3，生成中間帶logo的二維碼
<?php
include('phpqrcode/phpqrcode.php');
$value='http://';
$errorCorrectionLevel = 'L';
$matrixPointSize = 6;
QRcode::png($value, 'logo.png', $errorCorrectionLevel, $matrixPointSize, 2);
echo "QR code generated"."<br />";
$logo = 'logo.png';
$QR = 'xiangyang.png';
if($logo !== FALSE)
{
$QR = imagecreatefromstring(file_get_contents($QR));
$logo = imagecreatefromstring(file_get_contents($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, $logo_height);
}
imagepng($QR,'logo.png');
?>
希望對大家有所幫助
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