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

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

?php
namespace 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;
 }
}

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