How to delete files in a folder in php

How to delete files in a folder in php: 1. Delete the specified file directly through the unlink() function, the syntax is "unlink($filename)". 2. Use the while statement and the readdir() function to read the contents of the folder in a loop, use is_dir() to determine whether the file exists in the folder, and if it exists, use the unlink() method to delete it until all files in the folder are deleted.

#The operating environment of this article: Windows 7 system, PHP8, Dell G3 computer.

php file deletion uses the unlink() function

First create a file named testFile.txt.

Example

Delete the specified file

$filename = 'file.txt'; fopen($filename,'a+'); if(!unlink($filename)) { echo "文件{$filename}删除失败"; } else { echo "文件{$filename}删除成功"; } ?>

Delete all files in the directory

function delFileUnderDir( $dirName="../Smarty/templates/templates_c" ) { if ( $handle = opendir( "$dirName" ) ) { while ( false !== ( $item = readdir( $handle ) ) ) { if ( $item != "." && $item != ".." ) { if ( is_dir( "$dirName/$item" ) ) { delFileUnderDir( "$dirName/$item" ); } else { if( unlink( "$dirName/$item" ) )echo "成功删除文件： $dirName/$item
n"; } } } closedir( $handle ); } }

php unlink() function description

Function: Delete files.

Syntax:

unlink(filename,context)

Parameters:

• filename: Required. Specifies the files to be deleted.

• context: Optional. Specifies the environment for a file handle. Context is a set of options that modify the behavior of the stream.

Return value: true if successful, false if failed.

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