The following tutorial column of thinkphp will introduce to you the problems encountered in image processing in thinkphp5. I hope it will be helpful to friends in need!

Problems encountered in image processing

I additionally encapsulate the processing and uploading of images into Created a class to return the saved image path

The image return and saving path cannot be an absolute path.

This will cause the image to not be opened. It should be a relative path relative to the project and directory.

<?php
namespace app\common\vendor;

use think\Image;
use think\Request;

class Picture
{
    public function Up($file,$type)//获取图片，验证
    {
        //处理图片
        $request=new Request();
        $saveName=$request->time().&#39;.png&#39;;
        $image=Image::open($file);
        switch($type){
            case &#39;advertise&#39;:
                $deal=$image->thumb(20,40,6);
                $link=&#39;public&#39;.DS.&#39;static&#39;.DS.&#39;picture&#39;.DS.$type.DS.$saveName.&#39;.png&#39;;
                break;
            case &#39;user&#39;:
                $deal=$image->thumb(40,40,6);
                $link=&#39;public&#39;.DS.&#39;static&#39;.DS.&#39;picture&#39;.DS.$type.DS.$saveName.&#39;.png&#39;;
                break;
        }
        //上传图片
        if($deal->save(ROOT_PATH.$link)){
            //echo $deal->width()."<br/>".$deal->height();
            return $link;
        }else{
            echo "失败";
        }
    }
}

After encapsulating this class, the verification of the image needs to be verified in the controller

1. Problems encountered during picture verification

My picture verification:

    $result = $this->validate(['file' => $file],
        ['file' => 'require|image|fileExt:png,jpg,gif'],
        ['file.require' => '请选择上传文件','file.image'=>'必须是图片哦','file.fileExt'=>'文件格式不对']);

I verified it in the picture because I am not familiar with this verification, and I only know it after understanding it. The meaning of these contents

More upload file verification rules also include verification rules

• file to verify whether it is a File object
• image to verify whether it is an image File object
• image:width,height[,type] Verify the type, width and height of the image file
• fileExt:zip,doc,… Verify the file suffix
• fileMime:image /png,… Verify file type
• fileSize:1024 Verify file size

2. Image file upload method

The file is uploaded here, use Image: :open() opens the image and becomes the image format. These two are different formats

We want to process the image, so we need to open the image first and process it before saving the image.

In thinkphp To save the picture, use Picture->save(path) to save

But if you don’t need to process it, you can directly save it with File->move(path)

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