I have pdf files which are report cards of students.The report card names format is <student full name(which can have spaces)><space><studentID>.I need to download files.For this I have used the following code.
if(file_exists($folder_path.'/') && is_dir(folder_path)) {
$report_files = glob(folder_path.'/*'.'_*\.pdf' );
if(count($report_files)>0)
{
$result_data = '';
$result_data = rename_filenamespaces($report_files);
var_dump($result_data);//this shows the edited filename
foreach ($result_data as $file) {
if (strpos($file,$_GET['StudentID']) !== false) {
//code for showing the pdf docs to download
}
}
}
}
//function for renaming if filename has spaces
function rename_filenamespaces($location)
{
$new_location = $location;
foreach ($location as $file) {
//check file has spaces and filename has studentID
if((strpos($file," ")!==false)&& (strpos($file,$_GET['StudentID']) !== false))
{
$new_filename = str_replace(" ","-",$file);
rename($file,$new_filename);
$new_location = $new_filename;
}
}
return $new_location;
}
The variable $result_data gives me the filename without spaces,but the for each loop is showing Warning:Invalid argument supplied for foreach(). But the filename is changed in the server directory immediately after running the function. This warning shows only for first time. I am unable to solve this.
$new_location = $new_filename;
$new_location is a array
$new_filename is a string
You have to use $new_location[$index]
or try
foreach ($new_location as &$file) {
...
...
$file = $new_filename;
Related
Is there a function built into PHP that acts like file_exists, but given file contents instead of the file name?
I need this because I have a site where people can upload an image. The image is stored in a file with a name determined by my program (image_0.png image_1.png image_2.png image_3.png image_4.png ...). I do not want my site to have multiple images with the same contents. This could happen if multiple people found a picture on the internet and all of them uploaded it to my site. I would like to check if there is already a file with the contents of the uploaded file to save on storage.
This is how you can compare exactly two files with PHP:
function compareFiles($file_a, $file_b)
{
if (filesize($file_a) == filesize($file_b))
{
$fp_a = fopen($file_a, 'rb');
$fp_b = fopen($file_b, 'rb');
while (($b = fread($fp_a, 4096)) !== false)
{
$b_b = fread($fp_b, 4096);
if ($b !== $b_b)
{
fclose($fp_a);
fclose($fp_b);
return false;
}
}
fclose($fp_a);
fclose($fp_b);
return true;
}
return false;
}
If you keep the sha1 sum of each file you accept you can simply:
if ($known_sha1 == sha1_file($new_file))
You can use a while loop to look look through the contents of all of your files. This is shown in the example below :
function content_exists($file){
$image = file_get_contents($file);
$counter = 0;
while(file_exists('image_' . $counter . '.png')){
$check = file_get_contents('image_' . $counter . '.png');
if($image === $check){
return true;
}
else{
$counter ++;
}
}
return false;
}
The above function looks through all of your files and checks to see if the given image matches an image that is already stored. If the image already exists, true is returned and if the image does not exist false is returned. An example of how you can use this function shown is below :
if(content_exists($_FILES['file']['tmp_name'])){
// upload
}
else{
// do not upload
}
You could store hashed files in a .txt file separated by a \n so that you could use the function below :
function content_exists($file){
$file = hash('sha256', file_get_contents($file));
$files = explode("\n", rtrim(file_get_contents('files.txt')));
if(in_array($file, $files)){
return true;
}
else{
return false;
}
}
You could then use it to determine whether or not you should save the file as shown below :
if(content_exists($_FILES['file']['tmp_name'])){
// upload
}
else{
// do not upload
}
Just make sure that when a file IS stored, you use the following line of code :
file_put_contents('files.txt', hash('sha256', file_get_contents($file)) . "\n");
I am writing an application in PHP where the user submits a form of data and a file name is chosen based off of the data, like so:
$filename = "./savelocation/".$name."_".$identification."_".$date.'.txt';
I am trying to use the file_exists() function to check to see if a file with the same name exists. If it does, the final name is changed to prevent overwriting the submitted form data. Here is my implementation:
$file = "./savelocation/".$name."_".$identification."_".$date.'.txt';
$file = preg_replace('/\s+/', '', $file);
$filepath = "./savelocation/".$name."_".$identification."_".$date.'.txt';
if(file_exists($filepath))
{
$file = "./savelocation/"."INVALIDFILE".'.txt';
}
This prevents people from overwriting applications by changing the name to a single file which acts as the 'default file' in which it doesn't matter if it is overwritten. However, I know this is wrong. My logic was that the if statement would return true, which would execute the code inside of the statement changing the file name to the 'default file'. Is this even a good way to prevent duplicate submissions?
Try this...if there is a match on the file name, break from the loop and redirect
$userFile = $name."_".$identification."_".$date.'.txt;
$fileArray = glob('./savelocation/*');
$arrCount = count($fileArray);
$i = 1;
$msg = null;
foreach ($fileArray as $FA) {
$fileSubstring = str_replace("\.\/savelocation\/", "", $FA);
if ($i > $arrCount) {
break;
} else if ($userFile === $fileSubstring) {
$msg = 'repeat';
break;
} else null;
$i++;
}
if (isset($msg)) header('location: PageThatChastisesUser.php');
Alternatively, if you tweak your code a bit to change your file name, this should work:
if(file_exists($file)) {
$file = str_replace("\.txt", "duplicate\.txt", $file);
}
Change the file name in a way that identifies itself to you as a duplicate.
Here's one way of doing it:
$file = "./savelocation/".$name."_".$identification."_".$date.'.txt';
$file = preg_replace('/\s+/', '', $filen);
$filepath = "./savelocation/".$name."_".$identification."_".$date.'.txt';
$i = 1;
while(file_exists($filepath))
{
$filepath = "./savelocation/".$name."_".$identification."_".$date.'_'.$i.'.txt';
$i++;
}
I want to create a function which does rename the file and generate a unique name from its name, together with the user id. Below function is working properly but I'm not satisfied, kindly provide me the similar function.
if(is_array($file) and $file['name'] != '')
{
// getting unique file name
$file['name'] = getUniqueFilename($file);
$file_path = $file_root_path.$file['name'];
if(move_uploaded_file($file['tmp_name'], $file_path)){$filename = $file['name'];}
//
if($oldfile != ''){delete_file($file_root_path.$oldfile);}
return $filename;
} // if ends
else
{
return $oldfile;
} // else ends
function getUniqueFilename($file)
{
if(is_array($file) and $file['name'] != '')
{
// getting file extension
$fnarr = explode(".", $file['name']);
$file_extension = strtolower($fnarr[count($fnarr)-1]);
// getting unique file name
$file_name = substr(md5($file['name'].time()), 5, 15).".".$file_extension;
return $file_name;
} // ends for is_array check
else
{
return '';
} // else ends
} // ends
Use php uniqid() to generate unique ids http://php.net/manual/en/function.uniqid.php
function getUniqueFilename($file)
{
if(is_array($file) and $file['name'] != '')
{
// getting file extension
$file_extension = pathinfo($file['name'], PATHINFO_EXTENSION);
// getting unique file name
$file_name = uniqid().".".$file_extension;
while(file_exists('PATH_TO_WHERE_YOU_SAVE_FILE/'.$file_name)) {
$file_name = uniqid().".".$file_extension;
}
return $file_name;
} // ends for is_array check
else
{
return '';
} // else ends
} // ends
Take a hash of the file contents, e.g. with sha1_file. That guarantees a unique name for each unique file. If the same file gets uploaded a second time, it will generate the same hash, so you're not even storing duplicates of identical files.
Please use this code, that may help you
<?php
function tempdir($dir, $prefix='', $mode=0700)
{
if (substr($dir, -1) != '/') $dir .= '/';
do
{
$path = $dir.$prefix.mt_rand(0, 9999999);
} while (!mkdir($path, $mode));
return $path;
}
?>
Reference Link: http://www.php.net/manual/en/function.tempnam.php
You could create a filename with an [md5][1] hash salted with current [timestamp][2] and a random number.
Something like:
function getUniqueFilename($file)
{
do {
$name = md5(time().rand().$file['name']);
} while (file_exists($path.$name);
return $name;
}
Being path the folder where you want your file created
I have a zip file containing one folder, that contains more folders and files, like this:
myfile.zip
-firstlevel
--folder1
--folder2
--folder3
--file1
--file2
Now, I want to extract this file using PHPs ZipArchive, but without the "firstlevel" folder. At the moment, the results look like this:
destination/firstlevel/folder1
destination/firstlevel/folder2
...
The result I'd like to have would look like this:
destination/folder1
destination/folder2
...
I've tried extractTo, which produces the first mentioned result, and copy(), as suggested here, but this doesn't seem to work at all.
My current code is here:
if($zip->open('myfile.zip') === true) {
$firstlevel = $zip->getNameIndex(0);
for($i = 0; $i < $zip->numFiles; $i++) {
$entry = $zip->getNameIndex($i);
$pos = strpos($entry, $firstlevel);
if ($pos !== false) {
$file = substr($entry, strlen($firstlevel));
if(strlen($file) > 0){
$files[] = $file;
}
}
}
//attempt 1 (extractTo):
//$zip->extractTo('./test', $files);
//attempt 2 (copy):
foreach($files as $filename){
copy('zip://'.$firstlevel.'/'.$filename, 'test/'.$filename);
}
}
How can I achieve the result I'm aiming for?
Take a look at my Quick Unzipper script. I wrote this for personal use a while back when uploading large zip files to a server. It was a backup, and 1,000s of files take forever with FTP so using a zip file was faster. I use Git and everything, but there wasn't another option for me. I place this php file in the directory I want the files to go, and put the zip file in the same directory. For my script, they all have to operate in the same directory. It was an easy way to secure it for my needs, as everything I needed was in the same dir.
Quick Unzipper: https://github.com/incomepitbull/QuickUnzipper/blob/master/unzip.php
I linked the file because I am not showcasing the repo, just the code that makes the unzip tick. With modern versions of PHP, there should't be anything that isn't included on your setup. So you shouldn't need to do any server config changes to use this.
Here is the PHP Doc for the ZipArchive class it uses: http://php.net/manual/en/class.ziparchive.php
There isn't any included way to do what you want, which is a shame. So I would unzip the file to a temp directory, then use another function to copy the contents to where you want. So when using ZipArchive, you will need to return the first item to get the folder name if it is unknown. If the folder is known, ie: the same pesky folder name every time, then you could hard code the name.
I have made it return the first item from the index. So if you ALWAYS have a zip with 1 folder inside it, and everything in that folder, this would work. However, if you have a zip file without everything consolidated inside 1 folder, it would fail. The code I have added will take care of your question. You will need to add further logic to handle alternate cases.
Also, You will still be left with the old directory from when we extract it to the temp directory for "processing". So I included code to delete it too.
NOTE: The code uses a lot of if's to show the processing steps, and print a message for testing purposes. You would need to modify it to your needs.
<?php
public function copyDirectoryContents($source, $destination, $create=false)
{
if ( ! is_dir($source) ) {
return false;
}
if ( ! is_dir($destination) && $create === true ) {
#mkdir($destination);
}
if ( is_dir($destination) ) {
$files = array_diff(scandir($source), array('.','..'));
foreach ($files as $file)
{
if ( is_dir($file) ) {
copyDirectoryContents("$source/$file", "$destination/$file");
} else {
#copy("$source/$file", "$destination/$file");
}
}
return true;
}
return false;
}
public function removeDirectory($directory, $options=array())
{
if(!isset($options['traverseSymlinks']))
$options['traverseSymlinks']=false;
$files = array_diff(scandir($directory), array('.','..'));
foreach ($files as $file)
{
if (is_dir("$directory/$file"))
{
if(!$options['traverseSymlinks'] && is_link(rtrim($file,DIRECTORY_SEPARATOR))) {
unlink("$directory/$file");
} else {
removeDirectory("$directory/$file",$options);
}
} else {
unlink("$directory/$file");
}
}
return rmdir($directory);
}
$file = dirname(__FILE__) . '/file.zip'; // full path to zip file needing extracted
$temp = dirname(__FILE__) . '/zip-temp'; // full path to temp dir to process extractions
$path = dirname(__FILE__) . '/extracted'; // full path to final destination to put the files (not the folder)
$firstDir = null; // holds the name of the first directory
$zip = new ZipArchive;
$res = $zip->open($file);
if ($res === TRUE) {
$firstDir = $zip->getNameIndex(0);
$zip->extractTo($temp);
$zip->close();
$status = "<strong>Success:</strong> '$file' extracted to '$temp'.";
} else {
$status = "<strong>Error:</strong> Could not extract '$file'.";
}
echo $status . '<br />';
if ( empty($firstDir) ) {
echo 'Error: first directory was empty!';
} else {
$firstDir = realpath($temp . '/' . $firstDir);
echo "First Directory: $firstDir <br />";
if ( is_dir($firstDir) ) {
if ( copyDirectoryContents($firstDir, $path) ) {
echo 'Directory contents copied!<br />';
if ( removeDirectory($directory) ) {
echo 'Temp directory deleted!<br />';
echo 'Done!<br />';
} else {
echo 'Error deleting temp directory!<br />';
}
} else {
echo 'Error copying directory contents!<br />';
}
} else {
echo 'Error: Could not find first directory';
}
}
I have searched the forum but the closest question which is about the control stream did not help or I did not understand so I want to ask a different question.
I have an html form which uploads multiples files to a directory. The upload manager that handles the upload resides in the same script with a different code which I need to pass the file names to for processing.
The problem is that the files get uploaded but they don't get processed by the the other code. I am not sure about the right way to pass the $_FILES['uploadedFile']['tmp_name']) in the adjoining code so the files can be processed with the remaining code. Please find below the script.
More specif explanation:
this script does specifically 2 things. the first part handles file uploads and the second part starting from the italised comment extracts data from the numerous uploaded files. This part has a variable $_infile which is array which is suppose to get the uploaded files. I need to pass the files into this array. so far I struggled and did this: $inFiles = ($_FILES['uploadedFile']['tmp_name']); which is not working. You can see it also in the full code sample below. there is no error but the files are not passed and they are not processed after uploading.
<?php
// This part uploads text files
if (isset($_POST['uploadfiles'])) {
if (isset($_POST['uploadfiles'])) {
$number_of_uploaded_files = 0;
$number_of_moved_files = 0;
$uploaded_files = array();
$upload_directory = dirname(__file__) . '/Uploads/';
for ($i = 0; $i < count($_FILES['uploadedFile']['name']); $i++) {
//$number_of_file_fields++;
if ($_FILES['uploadedFile']['name'][$i] != '') { //check if file field empty or not
$number_of_uploaded_files++;
$uploaded_files[] = $_FILES['uploadedFile']['name'][$i];
//if (is_uploaded_file($_FILES['uploadedFile']['name'])){
if (move_uploaded_file($_FILES['uploadedFile']['tmp_name'][$i], $upload_directory . $_FILES['uploadedFile']['name'][$i])) {
$number_of_moved_files++;
}
}
}
}
echo "Files successfully uploaded . <br/>" ;
echo "Number of files submitted $number_of_uploaded_files . <br/>";
echo "Number of successfully moved files $number_of_moved_files . <br/>";
echo "File Names are <br/>" . implode(',', $uploaded_files);
*/* This is the start of a script to accept the uploaded into another array of it own for* processing.*/
$searchCriteria = array('$GPRMC');
//creating a reference for multiple text files in an array
**$inFiles = ($_FILES['uploadedFile']['tmp_name']);**
$outFile = fopen("outputRMC.txt", "w");
$outFile2 = fopen("outputGGA.txt", "w");
//processing individual files in the array called $inFiles via foreach loop
if (is_array($inFiles)) {
foreach($inFiles as $inFileName) {
$numLines = 1;
//opening the input file
$inFiles = fopen($inFileName,"r");
//This line below initially was used to obtain the the output of each textfile processed.
//dirname($inFileName).basename($inFileName,'.txt').'_out.txt',"w");
//reading the inFile line by line and outputting the line if searchCriteria is met
while(!feof($inFiles)) {
$line = fgets($inFiles);
$lineTokens = explode(',',$line);
if(in_array($lineTokens[0],$searchCriteria)) {
if (fwrite($outFile,$line)===FALSE){
echo "Problem w*riting to file\n";
}
$numLines++;
}
// Defining search criteria for $GPGGA
$lineTokens = explode(',',$line);
$searchCriteria2 = array('$GPGGA');
if(in_array($lineTokens[0],$searchCriteria2)) {
if (fwrite($outFile2,$line)===FALSE){
echo "Problem writing to file\n";
}
}
}
}
echo "<p>For the file ".$inFileName." read ".$numLines;
//close the in files
fclose($_FILES['uploadedFile']['tmp_name']);
fflush($outFile);
fflush($outFile2);
}
fclose($outFile);
fclose($outFile2);
}
?>
Try this upload class instead and see if it helps:
To use it simply Upload::files('/to/this/directory/');
It returns an array of file names that where uploaded. (it may rename the file if it already exists in the upload directory)
class Upload {
public static function file($file, $directory) {
if (!is_dir($directory)) {
if (!#mkdir($directory)) {
throw new Exception('Upload directory does not exists and could not be created');
}
if (!#chmod($directory, 0777)) {
throw new Exception('Could not modify upload directory permissions');
}
}
if ($file['error'] != 0) {
throw new Exception('Error uploading file: '.$file['error']);
}
$file_name = $directory.$file['name'];
$i = 2;
while (file_exists($file_name)) {
$parts = explode('.', $file['name']);
$parts[0] .= '('.$i.')';
$new_file_name = $directory.implode('.', $parts);
if (!file_exists($new_file_name)) {
$file_name = $new_file_name;
}
$i++;
}
if (!#move_uploaded_file($file['tmp_name'], $file_name)) {
throw new Exception('Could not move uploaded file ('.$file['tmp_name'].') to: '.$file_name);
}
if (!#chmod($file_name, 0777)) {
throw new Exception('Could not modify uploaded file ('.$file_name.') permissions');
}
return $file_name;
}
public static function files($directory) {
if (sizeof($_FILES) > 0) {
$uploads = array();
foreach ($_FILES as $file) {
if (!is_uploaded_file($file['tmp_name'])) {
continue;
}
$file_name = static::file($file, $directory);
array_push($uploads, $file_name);
}
return $uploads;
}
return null;
}
}