fgetss
In response to seejohnrun's version to check if a URL exists. Even if the file doesn't exist you're still going to get 404 headers. You can still use get_headers if you don't have the option of using CURL..
$file = 'http://www.domain.com/somefile.jpg';
$file_headers = @get_headers($file);
if($file_headers[0] == 'HTTP/1.1 404 Not Found') {
$exists = false;
}
else {
$exists = true;
}
file_exists
(PHP 4, PHP 5)
file_exists — Checks whether a file or directory exists
Description
bool file_exists ( string $filename )Returns TRUE if the file or directory specified by filename exists; FALSE otherwise.
On windows, use //computername/share/filename or \\computername\share\filename to check files on network shares.
Example 618. Testing whether a file exists
<?php
$filename = '/path/to/foo.txt';
if (file_exists($filename)) {
echo "The file $filename exists";
} else {
echo "The file $filename does not exist";
}
?>
Note: The results of this function are cached. See clearstatcache() for more details.
Tip
As of PHP 5.0.0 this function can also be used with some URL wrappers. Refer to Appendix O, List of Supported Protocols/Wrappers for a listing of which wrappers support stat() family of functionality.
Warning
This function returns FALSE for files inaccessible due to safe mode restrictions. However these files still can be included if they are located in safe_mode_include_dir.
Note: The check is done using the real UID/GID instead of the effective one.
See also is_readable(), is_writable(), is_file() and file().
add a note
User Contributed Notesfile_exists
vernon at kesnerdesigns dot net
10-May-2007 03:44
10-May-2007 03:44
havran at gmail dot com
12-Apr-2007 05:56
12-Apr-2007 05:56
Function url_exists() through CURL.
<?php
function url_exists($url) {
if (!$fp = curl_init($url)) return false;
return true;
}
?>
stephen dot reay at mac dot com
28-Mar-2007 03:28
28-Mar-2007 03:28
developing a CMS, with a link checker, it caused issues that when running on Win32, file_exists shows no error for case differences between the file on disk and the file you query for. this causes an issue when putting content created on the Win32 box onto a *NIX box.
the following is a function to test for files with case sensitivity, regardless of the OS. it returns 1 for a match, 0 for fails, and 2 if the file exists but with a different case.
function file_exists_case($strUrl)
{
$realPath = str_replace('\\','/',realpath($strUrl));
if(file_exists($strUrl) && $realPath == $strUrl)
{
return 1; //File exists, with correct case
}
elseif(file_exists($realPath))
{
return 2; //File exists, but wrong case
}
else
{
return 0; //File does not exist
}
}
seejohnrun at gmail dot com
23-Mar-2007 03:55
23-Mar-2007 03:55
not to overshadow anyone making url_exists functions, but...
function url_exists($url) {
if ((strpos($url, "http")) === false) $url = "http://" . $url;
if (is_array(@get_headers($url)))
return true;
else
return false;
}
enjoy!
earle dot west at transactionalweb dot com
15-Mar-2007 01:49
15-Mar-2007 01:49
If the file being tested by file_exists() is a file on a symbolically-linked directory structure, the results depend on the permissions of the directory tree node underneath the linked tree. PHP under a web server (i.e. apache) will respect permissions of the file system underneath the symbolic link, contrasting with PHP as a shell script which respects permissions of the directories that are linked (i.e. on top, and visible).
This results in files that appear to NOT exist on a symbolic link, even though they are very much in existance and indeed are readable by the web server.
Vladimir Sokolov
12-Feb-2007 01:24
12-Feb-2007 01:24
Updated funtion url_exist
It work right!
http://www.bbc.co.uk/newsa/n5ctrl/progs/frost/latest.ram - (true)
http://www.bbc.co.uk/newsa/n5ctrl/progs/frost/latest1.ram - (false)
http://www.bbc.co.uk/newsa/n5ctrl/progs/frost1/latest.ram -
(false)
-----
<?php
function url_exists($url) {
$a_url = parse_url($url);
if (!isset($a_url['port'])) $a_url['port'] = 80;
$errno = 0;
$errstr = '';
$timeout = 30;
if(isset($a_url['host']) && $a_url['host']!=gethostbyname($a_url['host'])){
$fid = fsockopen($a_url['host'], $a_url['port'], $errno, $errstr, $timeout);
if (!$fid) return false;
$page = isset($a_url['path']) ?$a_url['path']:'';
$page .= isset($a_url['query'])?'?'.$a_url['query']:'';
fputs($fid, 'HEAD '.$page.' HTTP/1.0'."\r\n".'Host: '.$a_url['host']."\r\n\r\n");
$head = fread($fid, 4096);
$head = substr($head,0,strpos($head, 'Connection: close'));
fclose($fid);
if (preg_match('#^HTTP/.*\s+[200|302]+\s#i', $head)) {
$pos = strpos($head, 'Content-Type');
return $pos !== false;
}
} else {
return false;
}
}
?>
adam at darkhousemedia dot com
13-Jan-2007 09:10
13-Jan-2007 09:10
In regards to the function url_exists below... the reason it's slow is because of fopen().
I tried this function with a loop of 25 urls, and output the time spent using microtime(), which ended up taking 4.6 seconds.
I wrote a new function using fsockopen() and tried with the same 25 urls. Time spent, 1.1 seconds. More than 4 times as fast.
Another issue with it, I don't know if this is a problem or not, but fopen() returns true if the url results in a 500 Internal Server Error. fsockopen() returns false in this case.
I don't know if this is the fastest/most efficient method, but I think it's a nice alternative regardless. Here's the function:
<?php
function url_exists($url){
if(strstr($url, "http://")) $url = str_replace("http://", "", $url);
$fp = @fsockopen($url, 80);
if($fp === false) return false;
return true;
}
?>
stefan at horn dot nl
12-Jul-2006 06:30
12-Jul-2006 06:30
file_exists and safe_mode
file_exists under safe_mode works (I work with for php 4) doesn't work when owner of the dir where the file stands differs from the php-owner.
e.g. file_exists in this dir will give FALSE nevertheless the file exists
rights owner dir
drwxr-xr-x apache images
change the owner of the dir to the phpowner and file_exists works.
I spent too much time to discover. Hope it will spare a lot of your time.
Stefan
sirarthur at sirarthur dot info
10-May-2006 07:04
10-May-2006 07:04
The following code will rename an uploaded image to a MD5 hash with a rand number added of its name and check wheter a file with same hash already exists or not:
<?php
$file = $HTTP_POST_FILES['file'];
$image=new Image($imgfld,$file);
if($image->FType != null){
if ($image->FType=="image/gif") {
$ext = ".gif";
}else{
$ext = ".jpg";
}
$nfile = md5($image->Name . rand());
while(file_exists($imgfld . $nfile . $ext) == true){
$nfile = md5($image->Name . rand());
}
$image->ResizedWidth = $imggrx;
$image->ResizedHeight = $imggry;
$image->Resample($nfile);
?>
It uses an image class found at phpclasses.org
pilotdoofy at gmail dot com
22-Apr-2006 08:35
22-Apr-2006 08:35
I wrote a very simple function that allows you to search a folder for a file name with a regular expression. It can handle both PREG and EREG regexps and can accept different case sensitivities for EREG regexps.
function regExpFile($regExp, $dir, $regType='P', $case='') {
# Two parameters accepted by $regType are E for ereg* functions
# and P for preg* functions
$func = ( $regType == 'P' ) ? 'preg_match' : 'ereg' . $case;
# Note, technically anything other than P will use ereg* functions;
# however, you can specify whether to use ereg or eregi by
# declaring $case as "i" to use eregi rather than ereg
$open = opendir($dir);
while( ($file = readdir($open)) !== false ) {
if ( $func($regExp, $file) ) {
return true;
}
} // End while
return false;
} // End function
Basically if you supply anything but "P" for $regType it will assume you're using EREG regexps. The case should only be blank or "i".
hiro at arkusa dot com
07-Feb-2006 09:23
07-Feb-2006 09:23
As of php 5.0.4, many (if not all) php file manipulation functions fail if a file's size is no smaller than 2GB (i.e. 2^31) on the x86 platforms. Even file_exists() fails (always returns FALSE). This puzzled me when I was writing a video file manipulation application.
A simple alternative is like:
function file_exists_2gb($filename) {
system("test -f $filename", $rval);
return ($rval == 0);
}
07-Jan-2006 09:08
I wrote this little handy function to check if an image exists in a directory, and if so, return a filename which doesnt exists e.g. if you try 'flower.jpg' and it exists, then it tries 'flower[1].jpg' and if that one exists it tries 'flower[2].jpg' and so on. It works fine at my place. Ofcourse you can use it also for other filetypes than images.
<?php
function imageExists($image,$dir) {
$i=1; $probeer=$image;
while(file_exists($dir.$probeer)) {
$punt=strrpos($image,".");
if(substr($image,($punt-3),1)!==("[") && substr($image,($punt-1),1)!==("]")) {
$probeer=substr($image,0,$punt)."[".$i."]".
substr($image,($punt),strlen($image)-$punt);
} else {
$probeer=substr($image,0,($punt-3))."[".$i."]".
substr($image,($punt),strlen($image)-$punt);
}
$i++;
}
return $probeer;
}
?>
Fabrizio (staff at bibivu dot com)
22-Dec-2005 02:11
22-Dec-2005 02:11
here a function to check if a certain URL exist:
<?php
function url_exists($url) {
$a_url = parse_url($url);
if (!isset($a_url['port'])) $a_url['port'] = 80;
$errno = 0;
$errstr = '';
$timeout = 30;
if(isset($a_url['host']) && $a_url['host']!=gethostbyname($a_url['host'])){
$fid = fsockopen($a_url['host'], $a_url['port'], $errno, $errstr, $timeout);
if (!$fid) return false;
$page = isset($a_url['path']) ?$a_url['path']:'';
$page .= isset($a_url['query'])?'?'.$a_url['query']:'';
fputs($fid, 'HEAD '.$page.' HTTP/1.0'."\r\n".'Host: '.$a_url['host']."\r\n\r\n");
$head = fread($fid, 4096);
fclose($fid);
return preg_match('#^HTTP/.*\s+[200|302]+\s#i', $head);
} else {
return false;
}
}
?>
in my CMS, I am using it with those lines:
<?php
if(!isset($this->f_exist[$image]['exist']))
if(strtolower(substr($fimage,0,4)) == 'http' || strtolower(substr($fimage,0,4)) == 'www.'){
if(strtolower(substr($image,0,4)) == 'www.'){
$fimage = 'http://'.$fimage;
$image = 'http://'.$image;
}
$this->f_exist[$image]['exist'] = $this->url_exists($fimage); //for now
} else {
$this->f_exist[$image]['exist'] = ($fimage!='' && file_exists($fimage) && is_file($fimage) && is_readable($fimage) && filesize($fimage)>0);
}
}
?>
flobee
13-Dec-2005 12:24
13-Dec-2005 12:24
file_exists overwrites the last access (atime) !
try:
if (@fclose(@fopen( $file, "r"))) {
// true;
} else {
// false;
}
to check if important for you
ihoss dot com at gmail dot com
19-Oct-2005 02:37
19-Oct-2005 02:37
The following script checks if there is a file with the same name and adds _n to the end of the file name, where n increases. if img.jpg is on the server, it tries with img_0.jpg, checks if it is on the server and tries with img_1.jpg.
<?php
$img = "images/".$_FILES['bilde']['name'];
$t=0;
while(file_exists($img)){
$img = "images/".$_FILES['bilde']['name'];
$img=substr($img,0,strpos($img,"."))."_$t".strstr($img,".");
$t++;
}
move_uploaded_file($_FILES['bilde']['tmp_name'], $img);
?>
phenbach at phenbach dot com
19-Sep-2005 10:37
19-Sep-2005 10:37
I recently had an issue with PLESK and copying file to other directories with the move_uploaded file function.
This would work on every linux server except plesk servers. I could figure it out and have yet to find out. I had to create a work a round and decided to use the exec() function.
As noted above the file_exist() function must need to wait for some time and I found the looking function a waste of resouces and didn't work for me anyway. So this is what I came up with.
function cp($source,$destination){
$cmd="cp -u ".$source ." ".$destination; //create the command string to copy with the update option
exec($cmd); //exec command
$cmd_test="ls -la ".$destination; //list file
exec($cmd_test,$out);
//If the file is present it $out[0] key will contain the file info.
//if it is not present it will be null
if (isset($out[0])){
return true;
}else{
return false;
}
}
davidc at php dot net
13-Sep-2005 08:05
13-Sep-2005 08:05
Also while using the file_exists file, please make sure you do not start using stuff like,
<?php
if(file_exists($_GET['file'] . '.php')) {
include($_GET['file'] . '.php';
}
?>
you could use something like this..
<?php
$inrep = "./";
$extfichier = ".php";
$page = $inrep.basename(strval($_REQUEST["page"]),$extfichier).extfichier;
if(file_exist($page)) {
include($page);
}
?>
or even hardcode it.
So since pretty much all commercial server(s) have url_fopen on.. you can imagine that file_exists($_GET['file']. '.php')
is rather .. unsecure :)
-David Coallier
tma at 2p dot cz
24-Aug-2005 08:47
24-Aug-2005 08:47
If checking for a file newly created by an external program in Windows then file_exists() does not recognize it immediately. Iy seems that a short timeout may be required.
<?
$file = 'file.tmp';
if ($h = popen("start \"bla\" touch $file", "r")) {
pclose($h);
// now I would like know if a file was created
// note: usleep not supported
$start = gettimeofday();
while (!file_exists(trim($file, " '\""))) {
$stop = gettimeofday();
if ( 1000000 * ($stop['sec'] - $start['sec']) + $stop['usec'] - $start['usec'] > 500000) break; // wait a moment
}
if (file_exists($file)) // now should be reliable
?>
09-Aug-2005 02:20
That is true feshi. But, if you have your server configured correctly, those access logs will only be accessible by an admin or the root account. The webuser account that runs the php script will be unable to start reading from that file. That's the easiest fix.
feshi
04-Aug-2005 10:34
04-Aug-2005 10:34
this code looks inocent
<?php
$filename=$_REQUEST["var"];
$filename .= ".data";
file_exist($filename){
include($filename);
}
?>
but if you pass something like script.php?var=test%00asbs
it should really can do bad things like including accesslog files if you replace "test" with something like "../logs/accesslog"
joe dot knall at gmx dot net
15-Mar-2005 11:59
15-Mar-2005 11:59
concerning file_exists and safe_mode:
if safe_mode=ON and $file (in safe_mode_include_dir) is not owned by the user who executes file_exists($file), file_exists returns FALSE but still $file can be included;
I could handle this by setting safe_mode_gid=On and appropriate group-ownership
07-Mar-2005 10:00
Nathaniel, you should read the manual carefuly next time prior to posting anything here, as all you indicated is the fact you missed the idea of the include_path. To remind - include_path is for some functions only, mainly intended for include and require to simpify include/require operations (kinda way the #include works). It is NOT for any filesystem function, which would be damn annoying than helpful, which is quite understandable and obvious.
andrewNOSPAMPLEASE at abcd dot NOSPAMERSca
11-Feb-2005 01:29
11-Feb-2005 01:29
file_exists will have trouble finding your file if the file permissions are not read enabled for 'other' when not owned by your php user. I thought I was having trouble with a directory name having a space in it (/users/andrew/Pictures/iPhoto Library/AlbumData.xml) but the reality was that there weren't read permissions on Pictures, iPhoto Library or AlbumData.xml. Once I fixed that, file_exists worked.
Nathaniel
09-Feb-2005 05:08
09-Feb-2005 05:08
I spent the last two hours wondering what was wrong with my if statement: file_exists($file) was returning false, however I could call include($file) with no problem.
It turns out that I didn't realize that the php include_path value I had set in the .htaccess file didn't carry over to file_exists, is_file, etc.
Thus:
<?PHP
// .htaccess php_value include_path '/home/user/public_html/';
// includes lies in /home/user/public_html/includes/
//doesn't work, file_exists returns false
if ( file_exists('includes/config.php') )
{
include('includes/config.php');
}
//does work, file_exists returns true
if ( file_exists('/home/user/public_html/includes/config.php') )
{
include('includes/config.php');
}
?>
Just goes to show that "shortcuts for simplicity" like setting the include_path in .htaccess can just cause more grief in the long run.
aidan at php dot net
10-Apr-2004 04:46
10-Apr-2004 04:46
If you'd like to check if a file exists anywhere your include path, have a look at this function:
http://aidanlister.com/repos/v/function.file_exists_incpath.php
alex at raynor nospam dot ru
05-Apr-2004 03:16
05-Apr-2004 03:16
If you use open_basedir in php.ini and use file_exists for file outside open_basedir path, you will not be warned at log and file_exists returns false even if file really exists.
12-Feb-2004 02:32
On nix systems file_exists will report a link that doesn't point to a valid file as non-existant, ie: the link itself exists but the file it points to does not. Using is_link will report true whether the link points to a valid file or not.