How to replace src with regular php

How to replace src with php regularity: 1. Open the corresponding PHP file; 2. Implement it through the "if(!function_exists('get_img_path')){function get_img_path($img){...}" method Get the image path according to different environments; 3. Use the "htmlspecialchars_decode" method to display the rich text editor content on the page.

The operating environment of this tutorial: Windows 7 system, PHP version 8.1, Dell G3 computer.

php How to replace src with regular expression?

PHP - Regularly matches the content of the article image tag src and replaces it

The image edited in the back-end rich text editor is displayed in various terminals

Because Not on the same server, the image access path is different

At this time, batch matching and replacement is required

//$info->content 是接口中返回文章的内容
    $preg = &#39;#<img(.+?)src\s*=\s*[\"|\&#39;]([^"|^\&#39;]+?)[\"|\&#39;]([^>]*?)>#&#39;;
        $info->content = preg_replace_callback($preg,function ($matches){
            $replace = get_img_path($matches[2]);//要替换的src
            return "<img{$matches[1]}src=\"$replace\"{$matches[3]}>";
        }, $info->content);

get_img_path() function obtains the image path according to different environments

if(!function_exists('get_img_path')){
    function get_img_path($img){
        //当前环境
        $env_info  = getenv('APP_ENV');
        switch ($env_info){
            case 'local':
                $url = 'https://local.***.com/'.$img;
                break;
            case 'test':
                $url = 'https://test.***.com/'.$img;
                break;
            case 'production':
                $url = 'https://production.***.com/'.$img;
                break;
            default:
                $url = 'https://local.***.com/'.$img;
                break;
        }
        return $url;
    }
}

Display on the page Rich text editor content

 <?php echo htmlspecialchars_decode($info->content);?>

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