利用yii2生成二维码的具体步骤

利用yii2生成二维码的具体步骤

生成二维码的具体步骤如下所示:

1、在官网下载类库

在官网下载类库后,确保当前php环境支持GD2,然后我们只需要使用phpqrcode.php就可以生成二维码了。

phpqrcode.php提供了一个关键的png()方法,其中

  • 参数$text表示生成二位的的信息文本;

  • 参数$outfile表示是否输出二维码图片 文件,默认否;

  • 参数$level表示容错率,也就是有被覆盖的区域还能识别,分别是 L(QR_ECLEVEL_L,7%),M(QR_ECLEVEL_M,15%),Q(QR_ECLEVEL_Q,25%),H(QR_ECLEVEL_H,30%); 

  • 参数$size表示生成图片大小,默认是3;参数$margin表示二维码周围边框空白区域间距值;

  • 参数$saveandprint表示是否保存二维码并显示。

2、下载后把解压后的phpqrcode文件夹放到extensions文件夹下,如下图:

利用yii2生成二维码的具体步骤

3、引入类

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

4、具体代码

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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4、前台的上传界面

<?php $vars = get_defined_vars (); $data = $vars [&#39;data&#39;]; $content=Yii::app ()->request-&gt;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'=&gt;'L - Low (7%)','M'=&gt;'M - Medium (15%)','Q'=&gt;'Q - Quartile (25%)','H'=&gt;'H - High (30%)'); $arrayTpgs=array('gif'=&gt;'gif格式','png'=&gt;'png格式','jpg格式'); ?&gt; <div>     <div>         <div>             <div>                 <span></span>在线生成二维码             </div>             <div></div>         </div> <?php $form = $this->beginWidget ( 'CActiveForm', array (         'id' =&gt; 'qrcode-form',         'htmlOptions' =&gt; array (                 'id' =&gt; 'view_table',                 'class' =&gt; 'add-form padding-10',                 'enctype' =&gt; 'multipart/form-data'         ),         'enableAjaxValidation' =&gt; false ) ); ?&gt;     <div>             <label>尺寸大小</label>             <div>                 <select>                     <?php  for ($i=1;$i<21;$i++):?>     <option>" <?php  echo $i==$matrixPointSize?&#39;selected&#39;:&#39;&#39;;?>&gt;<?php  echo $i;?> </option>                     <?php  endfor;?>                     </select>             </div>         </div>         <div>             <label>边距大小</label>             <div>                 <select>                     <?php  for ($i=0;$i<21;$i++):?>     <option>" <?php  echo $i==$matrixMarginSize?&#39;selected&#39;:&#39;&#39;;?>&gt;<?php  echo $i;?> </option>                     <?php  endfor;?>                 </select>             </div>         </div>         <div>             <label>容错级别</label>             <div>             <?php  echo CHtml::dropDownList(&#39;errorCorrectionLevel&#39;,$errorCorrectionLevel, $arrayCorrectionLevel,array(&#39;class&#39;=>'form-control'));?&gt;             </div>         </div>         <div>             <label>保存格式</label>             <div>             <?php  echo CHtml::dropDownList(&#39;tpgs&#39;,$tpgs, $arrayTpgs,array(&#39;class&#39;=>'form-control'));?&gt;             </div>         </div>         <div>             <label>二维码内容</label>             <div>                 <?php  echo CHtml::textField(&#39;content&#39;,$content,array(&#39;class&#39;=>'form-control','maxlength'=&gt;150));?&gt;             </div>         </div>         <div>             <label>二维码logo图片</label>             <div>                 <div>                         <input>                         <input>                     </div>                 <div><a>选择文件</a></div>             </div>         </div>         <div>             <input>         </div>     </div> <?php  $this->endWidget(); ?&gt;     <div>         <div>             <span></span>二维码         </div>         <div>         <?php  if(empty($_POST)):?>         <?php  echo CHtml::image(&#39;/static/tool/qrcode/qrcode.gif&#39;,&#39;二维码&#39;);?>         <?php  endif;?>         <?php  if(!empty($data[&#39;errors&#39;])):?>             <label>生成失败</label>             <div>             <?php  foreach ($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>" target="_blank"&gt;<span></span>右键另存为二维码</a>         <?php  endif;?>         </div>     </div> <?php  $this->renderPartial('/component/duoshuo_common');?&gt; </div>

最终效果如下:

利用yii2生成二维码的具体步骤

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