I'm relatively new to PHP and I'm trying to write my own plugin. Upon plugin activation it will run the following function:
function kb_create_uploadfolder () {
global $wpdp;
$upload_dir = wp_upload_dir();
$upload_dir = $upload_dir['basedir'] . "/plugin_uploads";
$upload_dircheck = wp_mkdir_p($upload_dir);
}
I didn't bother to check whether the directory already exists before creating it since I figured it won't overwrite anything or delete the contents if it does. Correct me if I'm wrong.
The thing is however, I would like to check if the creation of the directory was succesful or not but I can't figure out how to get this information.
Use is_dir():
if(is_dir($upload_dircheck))
{
echo "It is a dir";
}
else
{
echo "Sorry, non-existent or not a dir";
}
Also, mkdir() doesn't delete or overwrite existing contents, it just creates a directory if it does not yet exist.
If you're using PHP 4 or newer then you can use the is_dir() function.
Try is_dir().
Related
Strange behaviour, exentially:
(the name of the folder depends on the date - the purpose is a hit counter of the website, broken down by day)
if (!is_dir($folder)) { // first access in the day
mkdir($folder);
}
Well: on the server in internet all works well.
But when i try in local, with the server simulator of Easy PHP, happens that:
(a) The first time, no problem. The folder doesn't exists and it is created.
(b) subsequently, for example to a page refresh, the program flow again goes in the IF (!!!) generating the error (at line of mkdir) of kind: "Warning: mkdir(): No such file or directory in [...]".
All parent part of the directory $folder exists.
Thanks
.
Try using a recursive directory creation function:
function mkdir_r($dirName, $rights = 0777)
{
$dirs = explode(DIRECTORY_SEPARATOR , $dirName);
$dir = '';
if (strpos($dirs[count($dirs) - 1], '.')) {
array_pop($dirs);
}
foreach ($dirs as $part) {
$dir .= $part . DIRECTORY_SEPARATOR ;
if (!is_dir($dir) && strlen($dir) > 0) {
mkdir($dir, $rights);
}
}
}
This way all directories up to the directry you wanted to create are created if they don't exist.
mkdir doesn't work recursively unfortunately.
If anyone faces the issue; Use the native clearstatcache() function after you delete the file.
I'm quoting the interesting part of the original documentation
You should also note that PHP doesn't cache information about non-existent files. So, if you call file_exists() on a file that doesn't exist, it will return false until you create the file. If you create the file, it will return true even if you then delete the file. However unlink() clears the cache automatically.
For further information here is the documentation page: https://www.php.net/manual/en/function.clearstatcache.php
I am using CakePHP 3, and would like to change the behaviour of the handy PagesController which comes with the installation.
The current solution they use when trying to find and render a view file (.ctp) is using a try{} block, which is working well.
Actual code:
try {
$this->render(implode('/', $path));
} catch (MissingTemplateException $e) {
But in my case the most common situation will be that the .ctp file does not exist. (If it does not exist, it will go on with a default view and try fetch content from database, but it is not my problem here.)
In my modified version the most normal case will be that the MissingTemplaceException is thrown, which seem a bit overkill.
Why can I not simply check if the file exists?
Am I thinking right here? And if I am, how do I check for the file's existence?
After some fiddling around, I found the APP constant. This works:
$path = func_get_args();
$file = APP.'Template'.DS.'Pages'.DS.implode('/', $path).'.ctp';
if (file_exists($file))
{
// Render the file.
}
else
{
// Render some default file.
}
Why can I not simply check if the file exists?
I don't know why you can't. Just use file_exists()?
if (file_exists($filename)) {
echo "The file $filename exists";
} else {
echo "The file $filename does not exist";
}
Quick question. I'll start off with an example.
I have a social site similar to Facebook. When a user signs up my PHP script creates a directory named after his username and a custom sub-directory for this user called "photos".
The "photos" directory is never created when someone signs up. I assume it is because the actual server hasn't created the actual username directory in the first place.
My solution is that anytime i need to execute the photo function on my site for a user I should check if the folder exists and if not create it, which works fine. Is this standard procedure? Or is there a better way to create multiple directories at the same time while running checks.
When someone signs up I run this code, and the latter if statement doesn't successfully create the photos folder, so i check these two statements anytime I am editing something that would go in photos as a check for if the folder exists.
if (!file_exists("user/$username")) {
mkdir("user/$username", 0755);
}
if (!file_exists("user/$username/photos"))
{
mkdir("user/$username/photos", 0755);
}
The directories are created sequentially/synchronously thus once execution of the first mkdir() is finished the folder should be there with the indicated permission set.
As stated here the mkdir()
Returns TRUE on success or FALSE on failure.
and
Emits an E_WARNING level error if the directory already exists.
Emits an E_WARNING level error if the relevant permissions prevent
creating the directory.
So you can go:
if (!file_exists("user/$username")) {
if(mkdir("user/$username", 0755))
{
//directory created
if (!file_exists("user/$u/photos"))
{
mkdir("user/$username/photos", 0755);
}
}
else
{
//directory not created
}
}
If the mkdir() returns false - check the logs or handle the error.
You can do a quick directory 'exists' check like this
function check($images_dir) {
if($handle = opendir($images_dir)) {
// directory exists do your thing
closedir($handle);
} else {
// create directory
}
}
Where $images_dir = path/directory/user/$username
I make a site and it has this feature to upload a file and that file is uploaded to a server
Im just a newbie to php I download xampp and I run this site that i made in my local machine.
My site is like this you upload a file then that file will be uploaded to a server, but when i tried unlink() because when i try to remove the filename to a database I also want to remove that pic on the server, but instead I got an error and it says "Permission denied".
question:
How can I got permission to use unlink();?
I only run this on my localmachine using xampp
Permission denied error happens because you're trying to delete a file without having enough/right permissions for doing that.
To do this you must be using superuser account or be the same user that have uploaded the file.
You can go to the directory from your command line and check the permissions that are set to the file.
The easiest solution is to loggin as administrator/root and delete the file.
Here is another work around:
// define if we under Windows
$tmp = dirname(__FILE__);
if (strpos($tmp, '/', 0)!==false) {
define('WINDOWS_SERVER', false);
} else {
define('WINDOWS_SERVER', true);
}
$deleteError = 0;
if (!WINDOWS_SERVER) {
if (!unlink($fileName)) {
$deleteError = 1;
}
} else {
$lines = array();
exec("DEL /F/Q \"$fileName\"", $lines, $deleteError);
}
if ($deleteError) {
echo 'file delete error';
}
And some more: PHP Manual, unlink(), Post 106952
I would recommend, always first to check PHP Manual (in case your question concerns PHP), just go to the page with function that you have problems with and just click search CTRL+F in your browser and enter, for example, Windows, and as a result, in your case, you would find at least 7 related posts to that or very close to that what you were looking for.
Read this URL
How to use Unlink() function
I found this information in the comments of the function unlink()
Under Windows System and Apache, denied access to file is an usual error to unlink file. To delete file you must to change file's owern. An example:
<?php
chown($TempDirectory."/".$FileName,666); //Insert an Invalid UserId to set to Nobody Owern; 666 is my standard for "Nobody"
unlink($TempDirectory."/".$FileName);
?>
So try something like this:
$Path = './doc/stuffs/sample.docx';
chown($Path, 666);
if ( unlink($Path) )
echo "success";
else
echo "fail";
EDIT 1
Try to use this in the path:
$Path = '.'.DIRECTORY_SEPARATOR.'doc'.DIRECTORY_SEPARATOR.'stuffs'.DIRECTORY_SEPARATOR.'sample.docx';
I have searched far and wide on this one, but haven't really found a solution.
Got a client that wants music on their site (yea yea, I know..). The flash player grabs the single file called song.mp3 and plays it.
Well, I am trying to get functionality as to be able to have the client upload their own new song if they ever want to change it.
So basically, the script needs to allow them to upload the file, THEN overwrite the old file with the new one. Basically, making sure the filename of song.mp3 stays intact.
I am thinking I will need to use PHP to
1) upload the file
2) delete the original song.mp3
3) rename the new file upload to song.mp3
Does that seem right? Or is there a simpler way of doing this? Thanks in advance!
EDIT: I impimented UPLOADIFY and am able to use
'onAllComplete' : function(event,data) {
alert(data.filesUploaded + ' files uploaded successfully!');
}
I am just not sure how to point THAT to a PHP file....
'onAllComplete' : function() {
'aphpfile.php'
}
???? lol
a standard form will suffice for the upload just remember to include the mime in the form. then you can use $_FILES[''] to reference the file.
then you can check for the filename provided and see if it exists in the file system using file_exists() check for the file name OR if you don't need to keep the old file, you can use perform the file move and overwrite the old one with the new from the temporary directory
<?PHP
// this assumes that the upload form calls the form file field "myupload"
$name = $_FILES['myupload']['name'];
$type = $_FILES['myupload']['type'];
$size = $_FILES['myupload']['size'];
$tmp = $_FILES['myupload']['tmp_name'];
$error = $_FILES['myupload']['error'];
$savepath = '/yourserverpath/';
$filelocation = $svaepath.$name.".".$type;
// This won't upload if there was an error or if the file exists, hence the check
if (!file_exists($filelocation) && $error == 0) {
// echo "The file $filename exists";
// This will overwrite even if the file exists
move_uploaded_file($tmp, $filelocation);
}
// OR just leave out the "file_exists()" and check for the error,
// an if statement either way
?>
try this piece of code for upload and replace file
if(file_exists($newfilename)){
unlink($newfilename);
}
move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $newfilename);