一、下载PHP版本的Zxing扩展库

下载地址：https://github.com/khanamiryan/php-qrcode-detector-decoder

二、使用Zxing扩展库

1、文件下载好后，直接解压，结构如下，我们只需要lib这个文件夹

2、将lib文件夹重命名为Zxing，然后打开Zxing目录下的QrReader.php文件，可以发现命名空间是Zxing

3、接下来就很简单了，把Zxing文件夹放到thnikphp的扩展目录extend里

4、报错 Fatal error:: Allowed memory size of 134217728 bytes exhausted (tried to allocate 40 bytes) in

报错原因：PHP内存不够

解决方法：在调用QrReader前，先用ini_set()方法修改内存限制大小

//修改php内存限制为1024Mini_set('memory_limit','1024M');

5、报错 Call to undefined function Zxing\Common\fill_array()

解决方法：修改Zxing目录的QrReader.php文件，载入common/customFunctions.php文件，如下：

<?phpnamespace Zxing; use Zxing\Common\HybridBinarizer;use Zxing\Qrcode\QRCodeReader;include_once('common/customFunctions.php'); final class QrReader{}

QrReader.php完整代码：

<?phpnamespace Zxing; use Zxing\Common\HybridBinarizer;use Zxing\Qrcode\QRCodeReader;include_once('common/customFunctions.php'); final class QrReader{ const SOURCE_TYPE_FILE = 'file'; const SOURCE_TYPE_BLOB = 'blob'; const SOURCE_TYPE_RESOURCE = 'resource'; private $bitmap; private $reader; private $result; public function __construct($imgSource, $sourceType = QrReader::SOURCE_TYPE_FILE, $useImagickIfAvailable = true) { if (!in_array($sourceType, [ self::SOURCE_TYPE_FILE, self::SOURCE_TYPE_BLOB, self::SOURCE_TYPE_RESOURCE, ], true)) { throw new \InvalidArgumentException('Invalid image source.'); } $im = null; switch ($sourceType) { case QrReader::SOURCE_TYPE_FILE: if ($useImagickIfAvailable && extension_loaded('imagick')) { $im = new \Imagick(); $im->readImage($imgSource); } else { $image = file_get_contents($imgSource); $im = imagecreatefromstring($image); } break; case QrReader::SOURCE_TYPE_BLOB: if ($useImagickIfAvailable && extension_loaded('imagick')) { $im = new \Imagick(); $im->readImageBlob($imgSource); } else { $im = imagecreatefromstring($imgSource); } break; case QrReader::SOURCE_TYPE_RESOURCE: $im = $imgSource; if ($useImagickIfAvailable && extension_loaded('imagick')) { $useImagickIfAvailable = true; } else { $useImagickIfAvailable = false; } break; } if ($useImagickIfAvailable && extension_loaded('imagick')) { if (!$im instanceof \Imagick) { throw new \InvalidArgumentException('Invalid image source.'); } $width = $im->getImageWidth(); $height = $im->getImageHeight(); $source = new IMagickLuminanceSource($im, $width, $height); } else { if (!is_resource($im)) { throw new \InvalidArgumentException('Invalid image source.'); } $width = imagesx($im); $height = imagesy($im); $source = new GDLuminanceSource($im, $width, $height); } $histo = new HybridBinarizer($source); $this->bitmap = new BinaryBitmap($histo); $this->reader = new QRCodeReader(); } public function decode() { try { $this->result = $this->reader->decode($this->bitmap); } catch (NotFoundException $er) { $this->result = false; } catch (FormatException $er) { $this->result = false; } catch (ChecksumException $er) { $this->result = false; } } public function text() { $this->decode(); if (method_exists($this->result, 'toString')) { return $this->result->toString(); } return $this->result; } public function getResult() { return $this->result; }}

6、在代码里调用

//引用use Zxing\QrReader;//调用类库$qrcode = new QrReader("二维码图片路径"); $content = $qrcode->text();

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