Summary of usage of Yii framework to upload images, Yii framework to upload images_PHP tutorial

A summary of the usage of Yii framework to upload images, yii framework to upload images

This article describes the usage of Yii framework to upload images. Share it with everyone for your reference, the details are as follows:

Yii provides CUploadedFile to upload files, such as images or documents.

Official introduction to this class:

CUploadedFile represents the information for an uploaded file.
Call getInstance to retrieve the instance of an uploaded file, and then use saveAs to save it on the server. You may also query other information about the file, including name, tempName, type, size and error.
public properties

Property	Type	Description	Defined By
error	integer	Returns an error code describing the status of this file uploading.	CUploadedFile
extensionName	string	the file extension name for name.	CUploadedFile
hasError	boolean	whether there is an error with the uploaded file.	CUploadedFile
name	string	the original name of the file being uploaded	CUploadedFile
size	integer	the actual size of the uploaded file in bytes	CUploadedFile
tempName	string	the path of the uploaded file on the server.	CUploadedFile
type	string	the MIME-type of the uploaded file (such as "image/gif").	CUploadedFile

To upload files, three levels of MVC are used.

1. At the model level M, set a field as the file attribute in the rules method.

array('url',
    'file',  //定义为file类型
    'allowEmpty'=>true,
    'types'=>'jpg,png,gif,doc,docx,pdf,xls,xlsx,zip,rar,ppt,pptx',  //上传文件的类型
    'maxSize'=>1024*1024*10,  //上传大小限制，注意不是php.ini中的上传文件大小
    'tooLarge'=>'文件大于10M，上传失败！请上传小于10M的文件！'
),

2. View layer View, here you need to use CHtml::activeFileField to generate a button for selecting files. Note that files are uploaded, so the enctype should be set to: multupart/form-data

<&#63;php $form=$this->beginWidget('CActiveForm', array(
<span style="white-space:pre"> </span>'id'=>'link-form',
<span style="white-space:pre"> </span>'enableAjaxValidation'=>false,
<span style="white-space:pre"> </span>'htmlOptions' => array('enctype'=>'multipart/form-data'),
)); &#63;>

<div class="row">
    <&#63;php echo $form->labelEx($model,'url'); &#63;>
    <&#63;php echo CHtml::activeFileField($model,'url'); &#63;>
    <&#63;php echo $form->error($model,'url'); &#63;>
</div>

3. Control layer C

$model=new Link;
if(isset($_POST['Link']))
{
  $model->attributes=$_POST['Link'];
  if(empty($_POST['Link']['name'])){
    $model->name = $model->url;
  }
  $file = CUploadedFile::getInstance($model,'url');
  //获得一个CUploadedFile的实例
  if(is_object($file)&&get_class($file) === 'CUploadedFile'){
  // 判断实例化是否成功
    $model->url = './assets/upfile/file_'.time().'_'.rand(0,9999).'.'.$file->extensionName;  //定义文件保存的名称
  }else{
    $model->url = './assets/upfile/noPic.jpg';
    // 若果失败则应该是什么图片
  }
  if($model->save()){
    if(is_object($file)&&get_class($file) === 'CUploadedFile'){
      $file->saveAs($model->url); // 上传图片
    }
    $this->redirect(array('view','id'=>$model->lid));
  }
}

Readers who are interested in more Yii-related content can check out the special topics on this site: "Introduction to Yii Framework and Summary of Common Techniques", "Summary of Excellent PHP Development Framework", "Basic Tutorial for Getting Started with Smarty Templates", "php Date and Time" Usage Summary", "php object-oriented programming introductory tutorial", "php string (string) usage summary", "php mysql database operation introductory tutorial" and "php common database operation skills summary"

I hope this article will be helpful to everyone’s PHP program design based on the Yii framework.

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