How to achieve Gaussian blur in pictures in PHP

In PHP, the Gaussian algorithm can be used to blur the image. The statement to implement it is "function gaussian_blur($srcImg,$savepath=null...$blurFactor=3){...}", where The value of blurFactor represents the degree of blur.

The operating environment of this article: windows7 system, PHP7.1 version, DELL G3 computer

The example of this article describes the use of Gaussian algorithm in PHP to realize the image processing Blur function. I would like to share it with you for your reference. The details are as follows:

<?php
class image_blur{
   function gaussian_blur($srcImg,$savepath=null,$savename=null,$blurFactor=3){
    $gdImageResource=$this->image_create_from_ext($srcImg);
    $srcImgObj=$this->blur($gdImageResource,$blurFactor);
    $temp = pathinfo($srcImg);
    $name = $temp[&#39;basename&#39;];
    $path = $temp[&#39;dirname&#39;];
    $exte = $temp[&#39;extension&#39;];
    $savename = $savename ? $savename : $name;
    $savepath = $savepath ? $savepath : $path;
    $savefile = $savepath .&#39;/&#39;. $savename;
    $srcinfo = @getimagesize($srcImg);
    switch ($srcinfo[2]) {
      case1: imagegif($srcImgObj, $savefile); break;
      case2: imagejpeg($srcImgObj, $savefile); break;
      case3: imagepng($srcImgObj, $savefile); break;
      default: return&#39;保存失败&#39;; //保存失败
    }
    return $savefile;
    imagedestroy($srcImgObj);
  }
}
$image_blur = new image_blur();
//blurFactor的值代表模糊程度，savepath为空时候直接覆盖，savename为空直接用原名
$image_blur->gaussian_blur($srcImg="./5.jpg",$savepath=null,$savename=null,$blurFactor=5);
?>

This method was found on Baidu. Someone who interviewed me asked me to do it, and I needed a lot of information from Baidu to implement it.

The value of blurFactor represents the degree of blur

Effect display:

Original image:

Blurry degree 2

Blurry level 3

Blurry level 4

Blurry Level 5

Blurry Level 6

Blurry Level 7

Recommended learning: "PHP Video Tutorial"

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