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Digg  is_file
Tells whether the filename is a regular file
(PHP 4, PHP 5)
Example 655. is_file() example<?phpThe above example will output: bool(true)Related Examples ( Source code ) » is_file Examples ( Source code ) » Calculate the size for a directory Examples ( Source code ) » Is it a file Examples ( Source code ) » Create report in PDF format from Crystal Report via PHP and COM Code Examples / Notes » is_filerehfeld.us
regarding rlh at d8acom dot com method, It is incorrect. Well, it works but you are not guaranteed the file extension using that method. for example : filename.inc.php your method will tell you the ext is "inc", but it is in fact "php" heres a way that will work properly. <?php $dh = opendir($dir); while (false !== ($document = readdir($dh))) { $pos = strrpos($document, '.'); if (false !== $pos && strlen($document) > $pos + 1) { $ext = substr($document, $pos + 1); } } ?> cristian dot ban
regarding note from rehfeld dot us : In my experience the best( and easiest ) way to find the extension of a file is : <?php // use this when you are sure it actually has an extension. $extension = end(explode(".", $file_name)); ?> or <?php // this one will also check if it actually has an extension $parts = explode(".", $file_name); if (is_array($parts) && count($parts) > 1) $extension = end($parts); ?> jonathan shaltz
Maybe this is a newbie mistake, but note that paths are relative to the filesystem and the location of the script. This means that MS IIS virtual directories are not available by relative path - use an absolute. This threw me because virtual directories ARE available for URLs, at least on IIS. amraam
It seems that is_file doesn't return true for a file that is 0 bytes. Perhaps it is something with the file system. I am using IIS 3.0 on an NT4 box. I worked around it using !is_dir($filename) but that seems a clunky way to do it.
punknroll
is_file returns false if you don't have the permissions for the file or the directory (eg.: you are web34 and the directory belongs to root)!
simoncharest
In rlh's example, "$ext=explode('.',$document);" is only good if you consider that the filename only possesses a single dot (".") and that it is right before the extension. You should get the last dot's position with the strRPos() function instead. Another note : some files might not even have an extension (i.e.: mostly under Linux/Unix). quietust
In PHP 4.1.0 under win32, this seems to print out a warning message if the file does not exist (using error_reporting = E_ALL & ~E_NOTICE).
andreas dot stagl
if you're running apache as a service on a win32 machine, an you try to determinate if a file on an other pc in your network exists - ex.: is_file('//servername/share/dir1/dir2/file.txt') - you may return false when you're running the service as LocalSystem. To avoid this, you have to start the Apache-Service as a 'registered' domain user.
guilherme guilherme
If you are trying to get the extension of the file. I have the following piece of code for you: <?php $extension = substr($file_name, strrpos($file_name, ".")); // That code must get the correctly extension in any cases. ?> ludvig dot ericson
I tend to use alot of includes, and I found that the is_file is based on the script executed, not ran. if you request /foo.php and foo.php looks like this: <?php include('foobar/bar.php'); ?> and bar.php looks like this: <?php echo (is_file('foo/bar.txt')); ?> Then PHP (on win32, php 5.x) would look for /foo/bar.txt and not /foobar/foo/bar.txt. you would have to rewrite the is_file statement for that, or change working directory. Noting this since I sat with the problem for some time, cheers, Toxik. rlh
I do a lot of file parsing and have found the following technique extremely useful: while (false !== ($document = readdir($my_dir))) { $ext=explode('.',$document); if($document != '.' && $document != '..' && $ext[1]) { 'Do something to file...' } } It gets around the fact that, when working on website pages, the html files are read as directories when downloaded. It also allows you to extend the usefulness of the above method by adding the ability to determine file types e.g. if($document != '.' && $document != '..' && $ext[1]=='htm') or if($document != '.' && $document != '..' && $ext[1]=='doc') emin sadykhov azdg_nospam
File operations such as is_file (also is_dir, opendir, readdir) work slower with Absolute paths - processing time is increase in 2-3 times. Current rule is actual only for PHP5 (tested on 5.0.4, 5.1.1, Windows and Linux, 1st and 2nd Apache) Try to use relative paths in these operators. Example tested on my machine: <?php # note: in the both conditions file really exists! # WIN XP, PHP4 # processing time: ~ 0.0003 sec. if(is_file("images/10.jpg")) echo 'file exists'; # processing time: ~ 0.0002 sec. !!! if(is_file("C:/server/htdocs/mysite/images/10.jpg")) echo 'file exists'; # WIN XP, PHP5 # processing time: ~ 0.0004 sec. if(is_file("images/10.jpg")) echo 'file exists'; # processing time: ~ 0.0010 sec. if(is_file("C:/server/htdocs/mysite/images/10.jpg")) echo 'file exists'; ?> bill fumerola
be careful, is_file() fails on files larger than your integer storage (2^32 for most). Warning: is_file(): Stat failed for bigfile (errno=75 - Value too large for defined data type) riki1512 / a_t / gmx / d_ot / de
Be careful with big files. I get a Warning: is_file(): Stat failed for all.rar (errno=75 - Value too large for defined data type) in /.../test.php on line 3 and FALSE as result for a file of 3,5 GB. tatarynowicz
An easy way not to have to choose between hard-coding full paths and using relative paths is either via this line: <?php // in the bootstrap file define('DIR_ROOT', dirname(__FILE__)); // in other files, prefix paths with the constant require(DIR_ROOT . '/relative/to/bootstrap.php'); ?> or if you have to use a relative path: <?php require(dirname(__FILE__) . '/relative/to/this_file.php'); ?> This way all your paths will be absolute, yet you can move the application anywhere in the filesystem. BTW, each successive call to dirname takes you one step up in the directory tree. <?php echo __FILE__; // /www/site.com/public/index.php echo dirname(__FILE__); // /www/site.com/public echo dirname(dirname(__FILE__)); // /www/site.com ?> 08-mar-2005 05:02
### Symbolic links are resolved ### If you pass a symlink (unix symbolic link) as parameter, is_file will resolve the symlink and will give information about the refered file. For example: touch file ln -s file link echo '<? if (is_file("link")) echo "y\n"; ?>' | php -q will print "y". is_dir resolves symlinks too. |
Change Language
basename chgrp chmod chown clearstatcache copy delete dirname disk_free_space disk_total_space diskfreespace fclose feof fflush fgetc fgetcsv fgets fgetss file_exists file_get_contents file_put_contents file fileatime filectime filegroup fileinode filemtime fileowner fileperms filesize filetype flock fnmatch fopen fpassthru fputcsv fputs fread fscanf fseek fstat ftell ftruncate fwrite glob is_dir is_executable is_file is_link is_readable is_uploaded_file is_writable is_writeable lchgrp lchown link linkinfo lstat mkdir move_uploaded_file parse_ini_file pathinfo pclose popen readfile readlink realpath rename rewind rmdir set_file_buffer stat symlink tempnam tmpfile touch umask unlink |
