I just setup wkhtmltopdf to take html docs and turn them into pdfs but now I need a way to combine the multiple pdfs.
Any suggestions?
We do have pdflib license if there is something it can do but seems its mainly an api for custom building pdfs.
If you got wkhtmltopdf I suppose you're using Linux and you got a root shell access.
You could use Pdftk Toolkit via system() or exec().
First install it. It's a package in Debian/Ubuntu, for example:
sudo apt-get install pdftk
Then make sure that's visible in your bin search PATH.
And a simple PHP snippet:
// In / Out filenames
$input_files = array( 'file_one.pdf', 'file_two.pdf' );
$file_out = 'merged.pdf';
// Escape names and create argument
$line_parts = '';
foreach( $input_files as $file ) {
$line_parts .= escapeshellarg( $file ) . ' ';
}
// Run pdftk
$cmd = 'pdftk ' . $line_parts . ' cat output ' . escapeshellarg( $file_out );
system( $cmd, $retval );
if( $retval ) { print 'There was an error!'; }
Related
I developed a function using exec() but my hosting company do not allow for exec() functions to be run. How would I get the same result without using exec()?
I need something with the same approach or a library similar to composer which can allow me to install, update, and remove.
Here is what I have at the moment:
public static function install($library = null)
{
if (self::checkExecute() === true) { // check if exec is authorize
if (is_null($library)) {
$result = false;
} else {
$cmd = 'cd ' . self::$root . ' && composer require ' . $library . ' 2>&1';
exec($cmd, $output, $return); // update dependencies
$result = $output[2];
}
return $result;
}
}
https://www.php.net/manual/en/language.operators.execution.php
You could try to see if all shell execution functions are blocked. I would assume so but I've been in your shoes once upon a time.
print `composer install`;
The PHP exec command is not executing the same as the shell's interaction.
cd /var/www/myfolder
zip -r /var/www/myfolder/temp/newfile.zip ./*
generates just a zip of files in the temp directory. However (simplified version):
$zip_dir = '/var/www/myfolder';
$temp_dir = $zip_dir . '/temp/';
chdir($zip_dir);
exec('zip -r ' . $temp_dir . 'newfile.zip ./*', $return);
generates the same zip but with the full path's of var and www (which results in two copies of myfolder so my file is twice as large as needed). The $return however has the same output as the command line execution. Both state only 15 files directories/folders were zipped. There is no mention of var or www in the PHP output.
I believe the chdir() command will not have any bearing on how the commands in exec() are run. So this might fix it:
$zip_dir = '/var/www/myfolder';
$temp_dir = $zip_dir . '/temp/';
$cmd = 'cd ' . escapeshellarg($zip_dir) . ' && zip -r ' . escapeshellarg($temp_dir . 'newfile.zip') . ' ./*';
exec($cmd, $return);
Note we always escape variables being passed to the command line.
But why not just zip within PHP?
<?php
$zip_target = "/var/www/myfolder";
$zip_file = "/var/www/myfolder/temp/newfile.zip";
$zip_temp = tempnam(sys_get_temp_dir(), 'a458');
$zip_obj = new \ZipArchive();
if ($zip_obj->open($zip_temp, ZIPARCHIVE::OVERWRITE)) {
$zip_obj->addGlob("$zip_target/**/*.*");
}
$zip_obj->close();
rename($zip_temp, $zip_file);
I am trying to convert videos into MP4 using FFMPEG. I have it set up this way:
.
.
private $ffmpegPath;
public function __construct($con) {
$this->con = $con;
$this->ffmpegPath = realpath("ffmpeg/bin/ffmpeg.exe");
}
.
.
public function convertVideoToMp4($tempFilePath, $finalFilePath){
$cmd = "$this->ffmpegPath -i $tempFilePath $finalFilePath 2>&1";
$outputLog = array();
exec($cmd, $outputLog, $returnCode);
if($returnCode != 0){
foreach ($outputLog as $line){
echo $line."<br>";
return false;
}
}
return true;
}
And in the browser i get the following error:
'C:\xampp\htdocs\Thinksmart First Sprint' is not recognized as an internal or external command".
In my constructor i have it set up to give me the realpath and i suspect that this is what it does in the command line:
C:/xampp/htdocs/Thinksmart FIrst Sprint/ffmpeg/bin/ffmpeg.exe -i (file temp name) (file name i want)
And this should work, but i dont know why it wont. Any ideas? Its my first time working with video conversions.
As you can see, spaces in your command are used to separate arguments. So if there are spaces in a path you need to quote the entire path with quotes so that the shell/processor knows they aren't separators but are one argument:
$cmd = $cmd = '"' . $this->ffmpegPath . '" -i $tempFilePath $finalFilePath 2>&1';
Which will result in a command something like this:
"C:/xampp/htdocs/Thinksmart First Sprint/ffmpeg/bin/ffmpeg.exe" -i C:/path/to/file1 C:/path/to/file2 2>&1
I think only double-quotes work on Windows. You need to quote $tempFilePath and $finalFilePath if they might have spaces in them as well.
I am attempting to write a script which automatically unzips 7zip archives. I'm able to get the command to run from the command prompt, but it doesn't work when running from within the php script.
Here's what I have in terms of code:
$filefolder = "F:/dev/";
$filename = "archive.7z";
$filepath = $filefolder . $filename;
$unzip = "cmd /c 7z x " . $filePath . " -o" . $fileFolder . " -spf";
print_r($unzip . "<br>"); //checking to make sure the command is formed correctly
exec($unzip, $outcome, $rtnStatus);
print_r($outcome);
print_r($rtnStatus);
The following is returned for $outcome and $rtnStatus:
Array ( )
1
What am I missing here?
I would like to ask if it's possible to use PHP in removing a password from a password-protected PDF file in which I already know the password? I've seen this page which provides many options but using bash script. :( I was required to use PHP as much as possible. Any suggestions appreciated!
Of course it's possible, all you need to do is reverse engineer the encryption and compression and implement the reverse operations in PHP - but why bother:
<?php
`gs -q -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile=unencrypted.pdf -c .setpdfwrite -f encrypted.pdf`;
?>
C.
I use qpdf on linux to remove pdf password. To install run:
sudo apt install qpdf
Here is the function which invokes qpdf from php:
function removePdfPassword($inFilePath, $password, $outFilePath)
{
if (empty($inFilePath) || empty($password) || !file_exists($inFilePath)) {
return false;
}
$cmd = 'qpdf -password=' . escapeshellarg($password) . ' -decrypt ' . escapeshellarg($inFilePath) . ' ' . escapeshellarg($outFilePath);
exec($cmd, $output, $retcode);
$success = $retcode == 0;
if (!$success) {
#unlink($outFilePath);
}
return $success;
}