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1024M
-
ini_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：
-
<?php
-
namespace
Zxing;
-
-
use
Zxing\
Common\
HybridBinarizer;
-
use
Zxing\
Qrcode\
QRCodeReader;
-
include_once(
'common/customFunctions.php');
-
-
final
class QrReader
-
{
-
}
QrReader.php完整代码：
-
<?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;
-
}
-
}
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();
转载：https://blog.csdn.net/qq15577969/article/details/114217992
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