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Specific steps to generate QR code using yii2

王林

Mar 15, 2021 am 10:22 AM

yii2QR code

Specific steps to generate QR code using yii2

The specific steps to generate the QR code are as follows:

1. Download the class library from the official website

After downloading the class library from the official website, make sure The current PHP environment supports GD2, and then we only need to use phpqrcode.php to generate QR codes.

phpqrcode.php provides a key png() method, in which the

parameter $text represents the generated two-digit information text;
The parameter $outfile indicates whether to output a QR code image file, the default is no;
The parameter $level indicates the fault tolerance rate, that is, the covered area can still be recognized , respectively L (QR_ECLEVEL_L, 7%), M (QR_ECLEVEL_M, 15%), Q (QR_ECLEVEL_Q, 25%), H (QR_ECLEVEL_H, 30%);
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:

Specific steps to generate QR code using yii2

3. Introduce class

Yii::$enableIncludePath = false;
Yii::import (&#39;application.extensions.phpqrcode.phpqrcode&#39;, 1 );

4, specific code

public function actionQrcode(){
        $this->breadcrumbs=array_merge($this->breadcrumbs,array(
                &#39;生成二维码&#39;
        ));
        $qrcode_path=&#39;&#39;;
        $file_tmp_name=&#39;&#39;;
        $errors=array();
        if(!empty($_POST)){
            $content = trim($_POST[&#39;content&#39;]); //二维码内容
            $contentSize=$this->getStringLength($content);
            if($contentSize>290){
                $errors[]=&#39;字数过长，不能多于150个字符！&#39;;
            }
            Yii::$enableIncludePath = false;
            Yii::import (&#39;application.extensions.phpqrcode.phpqrcode&#39;, 1 );
            if(isset($_FILES[&#39;upimage&#39;][&#39;tmp_name&#39;]) && $_FILES[&#39;upimage&#39;][&#39;tmp_name&#39;] && is_uploaded_file($_FILES[&#39;upimage&#39;][&#39;tmp_name&#39;])){
                if($_FILES[&#39;upimage&#39;][&#39;size&#39;]>512000){
                    $errors[]="你上传的文件过大，最大不能超过500K。";
                }
                $file_tmp_name=$_FILES[&#39;upimage&#39;][&#39;tmp_name&#39;];
                $fileext = array("image/pjpeg","image/jpeg","image/gif","image/x-png","image/png");
                if(!in_array($_FILES[&#39;upimage&#39;][&#39;type&#39;],$fileext)){
                    $errors[]="你上传的文件格式不正确，仅支持 png, jpg, gif格式。";
                }
            }
            $tpgs=$_POST[&#39;tpgs&#39;];//图片格式
            $bas_path=dirname ( Yii::app ()->BasePath );
            $qrcode_bas_path=$bas_path.&#39;/upload/qrcode/&#39;;
            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()==&#39;Linux&#39;){

                $mv = move_uploaded_file($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,&#39;GB2312&#39;);
                if(!$save_path){
                    $errors[]=&#39;上传失败，请重试！&#39;;
                }
                $mv = move_uploaded_file($file_tmp_name, $qrcode_path);
            }
            if(empty($errors)){
                $errorCorrectionLevel = $_POST[&#39;errorCorrectionLevel&#39;];//容错级别
                $matrixPointSize = $_POST[&#39;matrixPointSize&#39;];//生成图片大小
                $matrixMarginSize = $_POST[&#39;matrixMarginSize&#39;];//边距大小
                //生成二维码图片
                QRcode::png($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,&#39;&#39;, $qrcode_path);
            }else{
                $qrcode_path=&#39;&#39;;
            }
        }
        $data=array(&#39;data&#39;=>array(&#39;errors&#39;=>$errors,&#39;qrcode_path&#39;=>$qrcode_path));
        $this->render ( &#39;qrcode&#39;,$data);
    }

Free video tutorial sharing: php video tutorial

4, front-end upload interface

<?php
$vars = get_defined_vars ();
$data = $vars [&#39;data&#39;];
$content=Yii::app ()->request->hostInfo;
$matrixPointSize=6;
$matrixMarginSize=2;
$errorCorrectionLevel=&#39;M&#39;;
$tpgs=&#39;gif&#39;;
if(!empty($_POST)){
    $content=$_POST[&#39;content&#39;];
    $matrixPointSize=$_POST[&#39;matrixPointSize&#39;];
    $matrixMarginSize=$_POST[&#39;matrixMarginSize&#39;];
    $errorCorrectionLevel=$_POST[&#39;errorCorrectionLevel&#39;];
    $tpgs=$_POST[&#39;tpgs&#39;];
}
$arrayCorrectionLevel=array(&#39;L&#39;=>&#39;L - Low (7%)&#39;,&#39;M&#39;=>&#39;M - Medium (15%)&#39;,&#39;Q&#39;=>&#39;Q - Quartile (25%)&#39;,&#39;H&#39;=>&#39;H - High (30%)&#39;);
$arrayTpgs=array(&#39;gif&#39;=>&#39;gif格式&#39;,&#39;png&#39;=>&#39;png格式&#39;,&#39;jpg格式&#39;);
?>
<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 = $this->beginWidget ( &#39;CActiveForm&#39;, array (
        &#39;id&#39; => &#39;qrcode-form&#39;,
        &#39;htmlOptions&#39; => array (
                &#39;id&#39; => &#39;view_table&#39;,
                &#39;class&#39; => &#39;add-form padding-10&#39;,
                &#39;enctype&#39; => &#39;multipart/form-data&#39;
        ),
        &#39;enableAjaxValidation&#39; => false
) );
?>
    <div class="form-group">
            <label class="col-lg-2 control-label">尺寸大小</label>
            <div class="col-lg-3">
                <select class="form-control" id="matrixPointSize"
                    name="matrixPointSize">
                    <?php for ($i=1;$i<21;$i++):?>
    <option value="<?php echo $i;?>" <?php echo $i==$matrixPointSize?&#39;selected&#39;:&#39;&#39;;?>><?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?&#39;selected&#39;:&#39;&#39;;?>><?php echo $i;?></option>
                    <?php endfor;?>
                </select>
            </div>
        </div>
        <div class="form-group">
            <label class="col-lg-2 control-label">容错级别</label>
            <div class="col-lg-3">
            <?php echo CHtml::dropDownList(&#39;errorCorrectionLevel&#39;,$errorCorrectionLevel, $arrayCorrectionLevel,array(&#39;class&#39;=>&#39;form-control&#39;));?>
            </div>
        </div>
        <div class="form-group">
            <label class="col-lg-2 control-label">保存格式</label>
            <div class="col-lg-3">
            <?php echo CHtml::dropDownList(&#39;tpgs&#39;,$tpgs, $arrayTpgs,array(&#39;class&#39;=>&#39;form-control&#39;));?>
            </div>
        </div>
        <div class="form-group">
            <label class="col-lg-2 control-label">二维码内容</label>
            <div class="col-lg-5">
                <?php echo CHtml::textField(&#39;content&#39;,$content,array(&#39;class&#39;=>&#39;form-control&#39;,&#39;maxlength&#39;=>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="$(&#39;input[id=upimage]&#39;).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(&#39;/static/tool/qrcode/qrcode.gif&#39;,&#39;二维码&#39;);?>
        <?php endif;?>
        <?php if(!empty($data[&#39;errors&#39;])):?>
            <label class="col-lg-2 text-right">生成失败</label>
            <div class="col-lg-5">
            <?php foreach ($data[&#39;errors&#39;] as $e):?>
            <?php echo $e;?><br>
            <?php endforeach;?>
            </div>
        <?php endif;?>
        <?php if(!empty($data[&#39;qrcode_path&#39;])):?>
            <?php echo CHtml::image($data[&#39;qrcode_path&#39;],&#39;二维码&#39;);?>
            <a class="btn btn-success color-f" href="<?php echo $data[&#39;qrcode_path&#39;];?>" 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(&#39;/component/duoshuo_common&#39;);?>
</div>

The final effect is as follows:

Specific steps to generate QR code using yii2

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