Guide to Using is_file () functions in PHP

Guide to Using is_file () functions in PHP

In php, The is_file () function is used to determine whether a file exists. It is also very simple to use. If you need it, refer to it.

The is_file () function checks whether the specified file name is a normal file.

Is_file-Tells whether the filename is a regular file

Usage:

Bool is_file (string $ filename) $ file is a required Parameter

Returns TRUE if the object exists and is normal.

Let's take a look at Example 1:

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<? Php Var_dump(is_file('a_file.txt '). "\ n "; Var_dump (is_file ('/usr/bin/'). "\ n "; ?>

The above example will output:

Bool (true)

Bool (false)

Example 2:

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<? Php Function isfile ($ file ){ Return preg_match ('/^ [^. ^: ^? ^-] [^: ^?] *.(? I) '. getexts ().' $/', $ file ); // First character cannot be .:? -Subsequent characters can't be :? // Then a. character and must end with one of your extentions // Getexts () can be replaced with your extentions pattern } Function getexts (){ // List acceptable file extensions here Return '(app | avi | doc | docx | exe | ico | mid | midi | mov | mp3 | Mpg | mpeg | pdf | psd | qt | ra | ram | rm | rtf | txt | wav | word | xls )'; } Echo isfile ('/Users/YourUserName/Sites/index.html '); ?>

Example 3:

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<? Php Function deletefolder ($ path) { If ($ handle = opendir ($ path )) { While (false! ==( $ File = readdir ($ handle ))) { If ($ file <> "." AND $ file <> "..") { If (is_file ($ path. '/'. $ file )) { @ Unlink ($ path. '/'. $ file ); } If (is_dir ($ path. '/'. $ file )) { Deletefolder ($ path. '/'. $ file ); @ Rmdir ($ path. '/'. $ file ); } } } } } ?>

This function deletes all files and folders.

The above is all the content of this article. I hope you will like it.