I have a two part question...
For my file check I need to look to see if the file is present in $filechk or $dirchk.
How can I use a wildcard on the file extension $filename.* when doing a file check?
I'm using is_file because I read that it's twice as fast when checking if a file exists.
code
$filechk1 = "/temp/files/" . $data[0] . ".doc";
$filechk2 = "/temp/files/" . $data[1] . ".doc";
$dirchk1 = "/temp/files/" . $IDname . $data[0] . ".doc";
$dirchk2 = "/temp/files/" . $IDname . $data[1] . ".doc";
if(is_file($filechk1) && ($filechk2)){
...
}
else { ... }
you should get a list of all of the files in the directory and then check the file extensions - is_file is for a single file only.
To check a number of files, just do a separate is_file() or file_exists() - the speed difference between the two is hardly relevant if you're doing this on one or two files.
For a wildcard search, do a glob().
$files = glob("/path/to/directory/*.doc");
print_r($files);
Related
Below I have left my code. It currently works in my development environment (localhost), but when I push the changes to my live server it seems like my php doesn't create the folder/file.
public static function saveImage($image, $name, $path = '')
{
$img_data = explode(',', $image);
$mime = explode(';', $img_data[0]);
$data = $img_data[1];
$extension = explode('/', $mime[0])[1];
if(!file_exists('../public/media/img/' . $path)){
mkdir('../public/media/img/' . $path, 0755);
echo('Test1');
}
echo('test2');
file_put_contents('../public/media/img/' . $path . $name . '.' . $extension, base64_decode($data));
return 'media/img/' . $path . $name . '.' . $extension;
}
Locally it will hit echo('test1') the first time, then it will only hit echo('test2'). When its on the server it always hits the echo('test1')
By default mkdir is not create a path recursively. An example if on your server you dont have a ../public/media folder, mkdir returns false and dont create a path.
To solve this pass a third parameter to mkdir as true:
mkdir('../public/media/img/' . $path, 0755, true);
Do yourself a favour and use absolute pathes...
You can use the constant __DIR__ to evaluate the folder in which the script actually resides.
Relative pathes are calculated from the current working directory, which can be different than __DIR__
I am working with codeigniter. I want to display images but if some image is not exist it should show image-not-found-medium.jpg which is dummy image..
below is my code
<?php
$image_path_medium = site_url('assets/images-products/medium');
$image_not_found_medium = $image_path_medium . "/" . "image-not-found-medium.jpg";
$image_name_with_path = $image_path_medium . "/" . $home_technology[$key]->product_sku . "-" . "a" . "-medium.jpg";
if (file_exists($image_name_with_path)) {
echo $image_name_with_path;
} else {
echo $image_not_found_medium;
}
?>
but it always shows $image_not_found_medium i think there is problem with my if condition.
Please help.
<?php
$image_path_medium = site_url('assets/images-products/medium');
$image_not_found_medium = $image_path_medium . "/" . "image-not-found-medium.jpg";
$image_name_with_path = $image_path_medium . "/" . $home_technology[$key]->product_sku . "-" . "a" . "-medium.jpg";//this is your image url
$image_file_path=FCPATH.'assets/images-products/medium'. $home_technology[$key]->product_sku . "-" . "a" . "-medium.jpg";//this is your file path
if (file_exists($image_file_path)) //file_exists of a url returns false.It should be real file path
{
echo $image_name_with_path;
}
else
{
echo $image_not_found_medium;
}
?>
You are using absolute path for file existence which is wrong. You have to use real path because the file_exists() function checks whether or not a file or directory exists on the current server.
If your assets folder is placed in root then just use getcwd() - Gets the current working directory as
$image_path_medium = getcwd().'assets/images-products/medium';
Otherwise give the proper path to the assets folder like
$image_path_medium = getcwd().'application/views/assets/images-products/medium';
Instead of file_exists() prefer is_file() when checking files, as file_exists() returns true on directories. In addition, you might want to see if getimagesize() returns FALSE to make sure you have an image.
Use like this.
$g = base_url().'upload/image.jpg';
if(file_exists($g) !== null){//your code..}
This is works for me in CI.
I have strong reason to believe that both functions rename() and unlink() are asynchronous, which, from my understanding, means that when the functions are called, the code below them are continued before it finishes its procedures on the filesystem. This is a problem for the internet app I'll explain below, because later code depends on these changes to already be set in stone. So, is there a way to make both synchronous, so that the code reader freezes when it hits these functions, until all of its tasks are fully carried out on the filesystem?
Here is the code in delete-image.php, which is called by ajax from another admin-images.php(the latter will not be shown):
`
foreach ($dirScan as $key => $value) {
$fileParts = explode('.', $dirScan[$key]);
if (isset($fileParts[1])) {
if ((!($fileParts[1] == "gif") && !($fileParts[1] == "jpg")) && (!($fileParts[1] == "png") && !($fileParts[1] == "jpg"))) {
unset($dirScan[$key]);
}
} else {
unset($dirScan[$key]);
}
}
$dirScan = array_values($dirScan);
// for thumbnail
$file = 'galleries/' . $currentGal . '/' . $currentDir . "/" . $dirScan[$imageNum - 1];
unlink($file);
for ($i = ($imageNum - 1) + 1; $i < count($dirScan); $i++) {
$thisFile = 'galleries/' . $currentGal . '/' . $currentDir . '/' . $dirScan[$i];
$thisSplitFileName = explode('.', $dirScan[$i]);
$newName = 'galleries/' . $currentGal . '/' . $currentDir . "/" . ($thisSplitFileName[0] - 1) . "." . $thisSplitFileName[1];
rename($thisFile, $newName);
}
// for large image
$fileParts = explode('.', $dirScan[$imageNum - 1]);
$file = 'galleries/' . $currentGal . '/' . $currentDir . "/large/" . $fileParts[0] . "Large." . $fileParts[1];
unlink($file);
for ($i = ($imageNum - 1) + 1; $i < count($dirScan); $i++) {
$thisSplitFileName = explode('.', $dirScan[$i]);
$thisFile = 'galleries/' . $currentGal . '/' . $currentDir . '/large/' . $thisSplitFileName[0] . "Large." . $thisSplitFileName[1];
$newName = 'galleries/' . $currentGal . '/' . $currentDir . "/large/" . ($thisSplitFileName[0] - 1) . "Large." . $thisSplitFileName[1];
rename($thisFile, $newName);
}
sleep(1);
echo 'deleted ' . $dirScan[$imageNum - 1] . " successfully!";
} else {
echo "please set the post data";
} ?>`
After this script returns its completed text, admin-images.php triggers a new function which populates an image table from these renamed and trimmed files. Sometimes it displays old names and files that were suppose to be deleted, and a simple page refresh gets rid of them. This seems to suggest that the above php script is running through all the code and spitting out echoed text to the mainfile before it completes its file-system manipulation (All of this other code is long and complicated, and hopefully unnecessary for the discussion at hand).
You'll notice, I've tried a sleep() function to halt the php script to hopefully give it time to finish. This is an ineligent, and problematic way of doing things, because I have to put a large amount of time to insure it works every-time, but I don't want the user to wait longer than she / he has to.
Mind that file-systems often use caches to reduce the load. Normally you won't notice, but sometimes you need to clear the cache if you need to have the real information. Check the configuration of your file-system if your issue is file-system related.
PHP itself uses a cache as well for some file-operations, so clear that, too.
See clearstatcache to clear the PHP stat cache.
Take note that this is a "view" issue, the file is actually deleted on disk, but PHP might still return it's there (until you clear the cache).
I suppose they are not asynchronous, because they return a result telling if the operation was successful or not.
I believe the problem happens because when you run scandir after making the modifications, it may be using "cached" data, from memory, instead of re-scanning the file system.
rename() is not, but unlink() is asynchronous on Windows.
Because there seems to be no way of waiting for a pending delete to finish, this answer suggests to rename a file before deleting it. PHP does not seem to do that, so you can assume it's asynchronous.
To use any file operation you are required to use the $_SERVER["DOCUMENT_ROOT"] to make that work. In case you wont do it.. the real operation wont work properly. Also in case you are using the Linux Server then you will be required to set the permissions for the folders in which you want to perform the file operation.
And mind it both the operations are synchronous they are not asynchronous. It also depends on the type of the server or the OS that you are using.
We have a script, /scripts/ourscript.php and a file, /texts/elvis.txt.
How can we change contents of this file, when we run ourscript.php?
Use file_put_contents() method to set the contents of a file.
If you need just to save new data, you can do:
$elvis = 'Contents here';
$fileName = '..' . PATH_SEPARATOR . 'texts' . PATH_SEPARATOR . 'elvis.txt';
if (file_put_contents($fileName, $elvis) === false)
{
// Handle error here.
}
If, instead of saving data, you need to change existing data, do:
$fileName = '..' . PATH_SEPARATOR . 'texts' . PATH_SEPARATOR . 'elvis.txt';
$elvis = file_get_contents($fileName);
// Do changes to $elvis here.
if (file_put_contents($fileName, $elvis) === false)
{
// Handle error here.
}
Finally, if you need to append something new to existing contents, use:
$elvis = PHP_EOL . 'Contents to append to existing stuff here';
$fileName = '..' . PATH_SEPARATOR . 'texts' . PATH_SEPARATOR . 'elvis.txt';
// Noticed FILE_APPEND as third argument?
if (file_put_contents($fileName, $elvis, FILE_APPEND) === false)
{
// Handle error here.
}
While MainMa has given you a direct answer, I'll point you to:
http://php.net/manual/en/function.file.php
Since it seems that you might have more of these questions, which could have been easily answered by looking at the documentation.
Also by figuring things out with the help of the documentation you'll learn how to solve such problems on your own, you know independence is a nice thing to have :)
i would like to move the files inside uploads/pension/#SOME_VARIABLE_NUMBER#/#SOME_CONSTANT_NUMBER#/
here is my code:
// move pension statements
// located at uploads/pension/%COMPANY_ID%/%USER_ID%/%HASH%
// so just move the %USER_ID% folder to the new company
$oldPensionDir = "uploads/pension/" . $demo_user[Users::companyID] . "/" . $demo_user[Users::userID] . "/";
$newPensionDir = "uploads/pension/" . $newCompanyID . "/" . $demo_user[Users::userID] . "/";
// see if the user had any files, and if so, move them
if(file_exists($oldPensionDir)) {
// if it doesnt exist, make it
if(!file_exists($newPensionDir))
mkdir($newPensionDir);
// move the folder
rename($oldPensionDir, $newPensionDir);
}
however... when i need to make the directory with the "mkdir" function, i get:
mkdir() [<a href='function.mkdir'>function.mkdir</a>]: No such file or directory
ok, maybe the mkdir won't work, but what about the rename? perhaps that will make the directory if it's not there... nope!
rename(uploads/pension/1001/783/,uploads/pension/1000/783/) [<a href='function.rename'>function.rename</a>]: The system cannot find the path specified. (code: 3)
so, there are two errors. i'm pretty sure if the renaming works, i won't even need the mkdir, but who knows... can anyone tell me why these are errors and how to fix them?
thanks!
EDIT: i've modified the code, and now my only issue is an access problem...
rename(uploads/pension/1000_783/,uploads/pension/1001/783/) [<a href='function.rename'>function.rename</a>]: Access is denied. (code: 5)
below is the new code. basically, i rename it three times (because it has to move through folders, but the final move is what causes the 'access denied' error. the odd part is that even when i delete the new dir and it makes a new one, i set it to have perms 0777!!! whats wrong with this?
// move pension and total reward statements
// located at uploads/pension|total_rewards/%COMPANY_ID%/%USER_ID%/%HASH%
// so just move the %USER_ID% folder to the new company
$oldPensionDir = "uploads/pension/" . $demo_user[Users::companyID] . "/" . $demo_user[Users::userID] . "/";
$tempPensionDir1 = "uploads/pension/" . $demo_user[Users::companyID] . "/" . $demo_user[Users::companyID] . "_" . $demo_user[Users::userID] . "/";
$tempPensionDir2 = "uploads/pension/" . $demo_user[Users::companyID] . "_" . $demo_user[Users::userID] . "/";
$newPensionDir = "uploads/pension/" . $newCompanyID . "/" . $demo_user[Users::userID] . "/";
// see if the user had any files, and if so, move them
if(file_exists($oldPensionDir)) {
// if it doesnt exist, make it
if(!file_exists($newPensionDir))
mkdir($newPensionDir, 0777, true);
// move the folder
// first, move it to the pension directory
rename($oldPensionDir, $tempPensionDir1);
rename($tempPensionDir1, $tempPensionDir2);
// second, move it into the new directory
rename($tempPensionDir2, $newPensionDir);
}
remove the mkdir and only rename:
rename($oldPensionDir, $newPensionDir);
where you always strip down to the directory you want to rename and not its children:
uploads/pension/1001
to
uploads/pension/1000
mkdir() has a recursive parameter you can use to create any parent directories needed for the path