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利用yii2產生二維碼的具體步驟

王林
王林轉載
2021-03-15 10:22:293075瀏覽

利用yii2產生二維碼的具體步驟

產生二維碼的具體步驟如下所示:

1、在官網下載類別庫

在官網下載類別庫後,確保目前PHP環境支援GD2,然後我們只需要使用phpqrcode.php就可以產生二維碼了。

phpqrcode.php提供了一個關鍵的png()方法,其中

  • #參數$text表示產生二位的資訊文字;

  • 參數$outfile表示是否輸出二維碼圖片文件,預設否;

  • #參數$level表示容錯率,也就是有被覆蓋的區域還能識別,分別是L(QR_ECLEVEL_L,7%),M(QR_ECLEVEL_M,15%),Q(QR_ECLEVEL_Q,25%),H(QR_ECLEVEL_H,30%); 

  • ##size#表示產生圖片大小,預設為3;參數$margin表示二維碼周圍邊框空白區域間距值;

  • #參數$saveandprint表示是否儲存二維碼並顯示。

2、下載後把解壓縮後的phpqrcode資料夾放到extensions資料夾下,如下圖:

利用yii2產生二維碼的具體步驟

##3、引入類別

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

4、具體程式碼

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、前台的上傳介面

<?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>

最終效果如下:


利用yii2產生二維碼的具體步驟

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