Detailed explanation of the use of file_exists function in php_PHP tutorial

Detailed explanation of the use of file_exists function in php

This article will explain to you the file_exists function in php to determine whether a file or directory exists. Attached are several classic examples. If necessary, Partners can refer to it.

Description:

bool file_exists ( string $filename )

Returns TRUE if the file or directory specified by filename exists, otherwise returns FALSE.

On Windows, use //computername/share/filename or computernameshare filename to check for network shared files.

In Windows, use //computername/share/filename or \computernamesharefilename to check shared files on the network.

Example 1

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1 2 3 4 5 6 7 8 $filename = '/jb51.net/aa/to/foo.txt'; if (file_exists($filename)) { echo "文件$filename exists"; } else { echo "文件$filename 不存在"; } ?> 1 2 3 4 5 1 2 3 echo file_exists("jb51.net.txt"); ?> 6 7 8

$filename = '/jb51.net/aa/to/foo.txt'; if (file_exists($filename)) { echo "File $filename exists"; } else { echo "File $filename does not exist"; } ?>

The output result is: The file /jb51.net/aa/to/foo.txt already exists Example 2 　?

1 2 3

<🎜>echo file_exists("jb51.net.txt");<🎜> <🎜>?>

Use file_exists directly to return true or false. The above is the entire content of this article, I hope you all like it.  Note< >: For more exciting tutorials, please pay attention to Bangke Home Programming http://www.bkjia.com/PHPjc/996755.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/996755.htmlTechArticleDetailed explanation of the use of file_exists function in php. This article explains to you the file_exists function in php to determine whether a file or directory exists. Attached are a few classic examples, friends in need can...