i am trying to make a pdf file with wkhtmltopdf when i pass url www.example.com pdf is generating or www.example.com?id=1
but when i try to put another parameter command execution is not working
www.example.com?id=1&type=u
shell_exec("c:\pdf\wkhtmltopdf.exe
http://localhost/test/index.php?id=1&typee=abc
test.pdf ");
i try to use it via command line to but its not working there also
thanks for help
The & is causing your command to fail as it has special meaning in shell. Use escapeshellarg() to escape those characters first.
Use escapeshellarg() to escape parameters before passing them to the command line.
This is also mandatory when passing external data (e.g. user input) as parameters.
Related
I just cannot fathom how to get the PHP exec() or shell_exec() functions to treat a '*' character as a wildcard. Is there some way to properly encode / escape this character so it makes it through to the shell?
This is on windows (via CLI shell script if that matters, Terminal or a git-bash yields the same results).
Take the following scenario:
C:\temp\ contains a bunch of png images.
echo exec('ls C:\temp\*');
// output: ls: cannot access 'C:\temp\*': No such file or directory
Permissions is not the problem:
echo exec('ls C:\temp\exmaple.png');
// output: C:\temp\example.png
Therefore the * character is the problem and is being treated as a literal filename rather than a wildcard. The file named * does not exist, so from that point of view, it's not wrong...
It also does not matter if I use double quotes to encase the command:
echo exec("ls C:\temp\*");
// output: ls: cannot access 'C:\temp\*': No such file or directory
I have also tried other things like:
exec(escapeshellcmd('ls C:\temp\*'));
exec('ls C:\temp\\\*');
exec('ls "C:\temp\*"');
exec('ls "C:\temp\"*');
And nothing works...
I'm pretty confused that I cannot find any other posts discussing this but maybe I'm just missing it. At this point I have already worked around the issue by manually programming a glob loop and using the internal copy() function on each file individually, but it's really bugging me that I do not understand how to make the wildcard work via shell command.
EDIT:
Thanks to #0stone0 - The answer provided did not particularly answer my initial question but I had not tried using forward slashes in the path and when I do:
exec('ls C:/temp/*')
It works correctly, and as 0stone0 said, it only returns the last line of the output, which is fine since this was just for proof of concept as I was not actually attempting to parse the output.
Also, on a side note, since posting this question my system had been updated to Win11 22H2 and now for some reason the original test code (with the backslashes) no longer returns the "Cannot access / no file" error message. Instead it just returns an empty string and has no output set to the &$output parameter either. That being said, I'm not sure if the forward slashes would have worked on my system prior to the 22H2 update.
exec() only returns the last output line by default.
The wildcard probably works, but the output is just truncated.
Pass an variable by ref to exec() and log that:
<?php
$output = [];
exec('ls -lta /tmp/*', $output);
var_dump($output);
Without any additional changes, this returns the same as when I run ls -lta /tmp/* in my Bash terminal
That said, glob() is still the preferred way of getting data like this especcially since
You shouldn't parse the output of ls
I'm tring to pass a string to a batch file from php using proc_open() on Windows. It works fine unless the string I'm passing is multiline, because it breaks the command with the line break. I tried various escaping methods, but none of them seems to work:
cmd style - prints the escape symbol and breaks line:
proc_open('script.bat -m "this is ^\n multiline"', $desc, $pipes)
another try - prints the whole string:
proc_open('script.bat -m "this is ^\\n multiline"', $desc, $pipes)
powershell style - prints the whole string:
proc_open('script.bat -m "this is `n multiline"', $desc, $pipes)
No matter what I tried, it either breaks the string anyway, or prints it as is, with no line break.
What am I missing or doing wrong? How to get multiline arguments to work via proc_open()?
Even if you get it escaped properly, it's nearly impossible, that your batch file is able to fetch a multi line argument.
You should test the batch script on it's own directly from cmd.exe, before trying to fix the escaping in php
c:\> script.bat This_is_^
More?
More? multiline
A simple echo %* or set "arg=%~1" is not able to handle multi line arguments, but some hacks like:
How to receive even the strangest command line parameters?
Im passing a multi line text as argument which will ... has only 1 line
I've an issue while using exec on php, maybe I didn't understand how it works.
The problem is: I wanna execute a binary file named 'test.exe'. That program takes data from an input file 'input.xml' and create an new file 'output.xml' with some modification on those data.
The below command line works perfectly on windows cmd :
>cd C:\Test
>test.exe C:\XML\example.xml C:\XML\example.out.xml
But a php script like this :
exec('C://Test//test.exe C://XML//example.xml C://XML//example.out.xml');
Doesn't work like suspected;
Each time I get beside the empty generated file example.out.xml another file named gmon.out.
I don't know what kind of file it is. Is it possible that this file will be the source of my problem?
Any idea?
You're using the wrong slash, you should be using a double backslash (one to be printed, and another to escape it). Using // will be literally translated to // so PHP will try to find C://Test//test.exe and fail.
The corrected syntax would be either
exec('C:\\Test\\test.exe C:\\XML\\example.xml C:\\XML\\example.out.xml');
or
exec('C:/Test/test.exe C:/XML/example.xml C:/XML/example.out.xml');
I am trying to run a .exe application with input file and argument.
With cmd I can successfully start the executable like this...
C:\Program Files\MyApp.exe "path\to\input file" argument
However, nothing happens when I simply copy paste the string above into the exec() function like this..
exec("C:\Program Files\MyApp.exe "path\to\input file" argument")
Do I need to escape parts of the string? How should I proceed?
Just pass the arguments like a normal calling from shell
ex:
exec("C:\Program Files\MyApp.exe \"path to\input file\" argument")
I had to use this format
php -q "./yii.php" migrate/up --interactive=0 --migrationPath=#vendor/pheme/yii2-settings/migrations
How do I properly execute commands in the command line using php? For example I'm using the command below in the command line to convert a docx file into a pdf file:
pdfcreator.exe /PF"D:\Documents\sample.docx
Now using PHP code I want to be able to execute the same command but nothing seems to be happening:
<?php
shell_exec('pdfcreator.exe /PF"D:\Documents\sample.docx"');
?>
Is this possible in PHP?If yes, how do I do it?
system("c:\\path\\to\\pdfcreator.exe /PF\"D:\\Documents\\sample.docx"");
try this.
Don't forget to escape your command with escapeshellcmd(). This will prevent you from having to use ugly backslashes and escape characters.
There are also other alternatives which may work:
`command` // back ticks drop you out of PHP mode into shell
exec('command', $output); // exec will allow you to capture the return of a command as reference
shell_exec('command'); // will return the output to a variable
system(); //as seen above.
Also, make sure your .exe is included within your $PATH variable. If not, include the full path for the command.