yii integrates phpqrcode to generate QR code with online demonstration address, yiiphpqrcode

1, first go to the official website to download the package http://phpqrcode.sourceforge.net/

After downloading the class library provided by the official website, you only need to use phpqrcode.php to generate the QR code. Of course, your PHP environment must enable GD2 support.

phpqrcode.php provides a key png() method, in which the
parameter $text indicates the generation of two-digit information text; the
parameter $outfile indicates whether to output a QR code image file, the default is no;
The parameter $level represents the fault tolerance rate, that is, the covered area can still be identified, which are L (QR_ECLEVEL_L, 7%), M (QR_ECLEVEL_M, 15%), Q (QR_ECLEVEL_Q, 25%), H (QR_ECLEVEL_H , 30%);
The parameter $size indicates the size of the generated image, the default is 3; the parameter $margin indicates the spacing value of the blank area of the border around the QR code;
The parameter $saveandprint indicates whether to save the QR code and display it.

2. After downloading, place the decompressed phpqrcode folder under the extensions folder, as shown below:

3, introduce the class phpqrcode

Yii::$enableIncludePath = false;
Yii::import ('application.extensions.phpqrcode.phpqrcode', 1 );

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The following is the complete method of generating QR code

public function actionQrcode(){
		$this->breadcrumbs=array_merge($this->breadcrumbs,array(
				'生成二维码'
		));
		$qrcode_path='';
		$file_tmp_name='';
		$errors=array();
		if(!empty($_POST)){
			$content = trim($_POST['content']); //二维码内容
			$contentSize=$this->getStringLength($content);
			if($contentSize>290){
				$errors[]='字数过长，不能多于150个字符！';
			}
			Yii::$enableIncludePath = false;
			Yii::import ('application.extensions.phpqrcode.phpqrcode', 1 );
			if(isset($_FILES['upimage']['tmp_name']) && $_FILES['upimage']['tmp_name'] && is_uploaded_file($_FILES['upimage']['tmp_name'])){
				if($_FILES['upimage']['size']>512000){
					$errors[]="你上传的文件过大，最大不能超过500K。";
				}
				$file_tmp_name=$_FILES['upimage']['tmp_name'];
				$fileext = array("image/pjpeg","image/jpeg","image/gif","image/x-png","image/png");
				if(!in_array($_FILES['upimage']['type'],$fileext)){
					$errors[]="你上传的文件格式不正确，仅支持 png, jpg, gif格式。";
				}
			}
			$tpgs=$_POST['tpgs'];//图片格式
			$bas_path=dirname ( Yii::app ()->BasePath );
			$qrcode_bas_path=$bas_path.'/upload/qrcode/';
			if(!is_dir($qrcode_bas_path)){
				mkdir($qrcode_bas_path, 0777, true);
			}
			$uniqid_rand=date("Ymdhis").uniqid(). rand(1,1000);
			$qrcode_path=$qrcode_bas_path.$uniqid_rand. "_1.".$tpgs;
			$qrcode_path_new=$qrcode_bas_path.$uniqid_rand."_2.".$tpgs;
			if(Helper::getOS()=='Linux'){

				$mv = move_uploaded_file($file_tmp_name, $qrcode_path);
			}else{
				//解决windows下中文文件名乱码的问题
				$save_path = Helper::safeEncoding($qrcode_path,'GB2312');
				if(!$save_path){
					$errors[]='上传失败，请重试！';
				}
				$mv = move_uploaded_file($file_tmp_name, $qrcode_path);
			}
			if(empty($errors)){
				$errorCorrectionLevel = $_POST['errorCorrectionLevel'];//容错级别
				$matrixPointSize = $_POST['matrixPointSize'];//生成图片大小
				$matrixMarginSize = $_POST['matrixMarginSize'];//边距大小
				//生成二维码图片
				QRcode::png($content,$qrcode_path_new, $errorCorrectionLevel, $matrixPointSize, $matrixMarginSize);
				$QR = $qrcode_path_new;//已经生成的原始二维码图
				$logo = $qrcode_path;//准备好的logo图片
				if (file_exists($logo)) {
					$QR = imagecreatefromstring(file_get_contents($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, $logo_height);
					//输出图片
// 					header("Content-type: image/png");
					imagepng($QR,$qrcode_path);
					imagedestroy($QR);
				}else{
					$qrcode_path=$qrcode_path_new;
				}
				$qrcode_path=str_replace($bas_path,'', $qrcode_path);
			}else{
				$qrcode_path='';
			}
		}
		$data=array('data'=>array('errors'=>$errors,'qrcode_path'=>$qrcode_path));
		$this->render ( 'qrcode',$data);
	}

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Upload interface at the front desk:

<?php
$vars = get_defined_vars ();
$data = $vars ['data'];
$content=Yii::app ()->request->hostInfo;
$matrixPointSize=6;
$matrixMarginSize=2;
$errorCorrectionLevel='M';
$tpgs='gif';
if(!empty($_POST)){
	$content=$_POST['content'];
	$matrixPointSize=$_POST['matrixPointSize'];
	$matrixMarginSize=$_POST['matrixMarginSize'];
	$errorCorrectionLevel=$_POST['errorCorrectionLevel'];
	$tpgs=$_POST['tpgs'];
}

$arrayCorrectionLevel=array('L'=>'L - Low (7%)','M'=>'M - Medium (15%)','Q'=>'Q - Quartile (25%)','H'=>'H - High (30%)');
$arrayTpgs=array('gif'=>'gif格式','png'=>'png格式','jpg格式');
?>
<div class="col-md-12">
	<div class="form-horizontal panel panel-default margin-t-10 b-img">
		<div class="panel-heading">
			<div class="pull-left">
				<span class="g-bg glyphicon glyphicon-wrench margin-r-2"
					aria-hidden="true"></span>在线生成二维码
			</div>
			<div class="clearfix"></div>
		</div>
<?php
$form = $this->beginWidget ( 'CActiveForm', array (
		'id' => 'qrcode-form',
		'htmlOptions' => array (
				'id' => 'view_table',
				'class' => 'add-form padding-10',
				'enctype' => 'multipart/form-data'
		),
		'enableAjaxValidation' => false
) );
?>
	<div class="form-group">
			<label class="col-lg-2 control-label">尺寸大小</label>
			<div class="col-lg-3">
				<select class="form-control" id="matrixPointSize"
					name="matrixPointSize">
					<?php for ($i=1;$i<21;$i++):?>
                        <option value="<?php echo $i;?>" <?php echo $i==$matrixPointSize?'selected':'';?>><?php echo $i;?></option>
                    <?php endfor;?>
                	</select>
			</div>
		</div>
		<div class="form-group">
			<label class="col-lg-2 control-label">边距大小</label>
			<div class="col-lg-3">
				<select class="form-control" id="matrixMarginSize"
					name="matrixMarginSize">
					<?php for ($i=0;$i<21;$i++):?>
                        <option value="<?php echo $i;?>" <?php echo $i==$matrixMarginSize?'selected':'';?>><?php echo $i;?></option>
                    <?php endfor;?>
                </select>
			</div>
		</div>
		<div class="form-group">
			<label class="col-lg-2 control-label">容错级别</label>
			<div class="col-lg-3">
			<?php echo CHtml::dropDownList('errorCorrectionLevel',$errorCorrectionLevel, $arrayCorrectionLevel,array('class'=>'form-control'));?>
			</div>
		</div>
		<div class="form-group">
			<label class="col-lg-2 control-label">保存格式</label>
			<div class="col-lg-3">
			<?php echo CHtml::dropDownList('tpgs',$tpgs, $arrayTpgs,array('class'=>'form-control'));?>
			</div>
		</div>
		<div class="form-group">
			<label class="col-lg-2 control-label">二维码内容</label>
			<div class="col-lg-5">
				<?php echo CHtml::textField('content',$content,array('class'=>'form-control','maxlength'=>150));?>
			</div>
		</div>
		<div class="form-group">
			<label class="col-lg-2 control-label">二维码logo图片</label>
			<div class="col-lg-5">
				<div class="col-md-6">
						<input id="upimage" type="file" name="upimage" class="hidden">
						<input id="tmp_file" class="form-control" type="text" value="gif，png，jpg">
					</div>
				<div class="col-md-6"><a class="btn btn-default" onclick="$('input[id=upimage]').click();">选择文件</a></div>
			</div>
		</div>
		<div class="list_back">
			<input type="submit" value="生成二维码" class="btn btn-success">
		</div>
	</div>
<?php $this->endWidget(); ?>
	<div class="panel panel-default margin-t-10 b-img">
		<div class="panel-heading">
			<span class="g-bg glyphicon glyphicon-wrench margin-r-2" aria-hidden="true"></span>二维码
		</div>
		<div class="panel-body">
		<?php if(empty($_POST)):?>
		<?php echo CHtml::image('/static/tool/qrcode/qrcode.gif','二维码');?>
		<?php endif;?>
		<?php if(!empty($data['errors'])):?>
			<label class="col-lg-2 text-right">生成失败</label>
			<div class="col-lg-5">
			<?php foreach ($data['errors'] as $e):?>
			<?php echo $e;?><br>
			<?php endforeach;?>
			</div>
		<?php endif;?>
		<?php if(!empty($data['qrcode_path'])):?>
			<?php echo CHtml::image($data['qrcode_path'],'二维码');?>
			<a class="btn btn-success color-f" href="<?php echo $data['qrcode_path'];?>" target="_blank"><span aria-hidden="true" class="glyphicon glyphicon-download-alt margin-r-2"></span>右键另存为二维码</a>
		<?php endif;?>
		</div>
	</div>
<?php $this->renderPartial('/component/duoshuo_common');?>
</div>

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