How to implement text deletion function in php

How to implement the text deletion function in php: 1. Create a PHP sample file; 2. Implement the text deletion function through the customized "function deldir($dirname){...}" method.

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

How does php realize the text deletion function?

php implements the file deletion function

The code is as follows:

<?php
    function deldir($dirname){
        if(!file_exists($dirname)){    
            die("文件不存在");
        }
        if(is_file($dirname)){
            unlink($dirname);
        }else{
            $dir = opendir($dirname);
            while ($filename = readdir($dir)) {
                if($filename != "." && $filename != ".."){
                    $filename = $dirname."/".$filename;
                    if(is_dir($filename)){
                        deldir($filename);    //用递归遍历目录
                    }else{
                        unlink($filename);
                    }
                }
            }
            closedir($dir);
            rmdir($dirname);
        }
    }

unlink() function deletes files. Returns true if successful, false if failed.

The file_exists() function checks whether a file or directory exists. Returns true if the specified file or directory exists, false otherwise.

is_dir() function checks whether the specified file is a directory.

Recommended learning: "PHP Video Tutorial"

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