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');
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
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.
I need to have my Python program open a file, use some of the data in it, and spit out a different file. I'm having several issues, and was hoping if someone could definitively tell me if they are permissions based and if so, how to fix them. My Python program works through the terminal.
Here are some areas I've identified where it doesn't work:
import matplotlib.pyplot
infile = open('/correct_pathway/textfile1.txt','r')
outfile = open('/correct_pathway/textfile2.txt','w')
It is having troubles on all of these separately. I didn't know there could be permissions issues while importing a module, but there are. Also the files are globally read/writable that it is trying to open.
EDIT: Sorry, that was unintentionally vague and had a typo in the code that was not actually there. The PHP code as written on the webpage is as follows (it works if I call in a much simpler python program, so there is no problem I can think of here):
<?php $command= '/usr/bin/python /correct_pathway/program.py';
$temp = exec($command, $output);
print_r($temp); ?>
The code is supposed to open the infile, read a number off of it, and then write that number to the outfile as well as print off a different number. The printed number should be displayed on the webpage. This all works fine through the terminal, just not on the webpage.
Thanks in advance!
To define how a file should be opened, i.e. read or write, the syntax is to surround the r or w with quotes. So your above code should look like the following.
import matplotlib.pyplot
infile = open('/correct_pathway/textfile1.txt','r')
outfile = open('/correct_pathway/textfile2.txt','w')
see if you can access the files with the quotes added.
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.
Sorry for my bad English.
I must to check 2 csv files, if strings with one id is different, must write to file.
If there is no string with id from 1st file in second file, must write this to file too.
it works, but with element (id=47) i have got a trouble. it into to files, but script sad, that there is only in one.
download script you can from here
http://sil-design.ru/uploads/script.zip
If you do a echo $str1[0].' - '.$str2[0].'<br />'; you will see that the two 47's are never compared. Also I am not sure what the t is in: $f2 = fopen($fileurl, 'rt');.
If you open your backup.csv in notepad and place your cursor after the 47;XL and hold delete to delete anything after it and save. Then try your script again, it should work. It seems that the backup.csv was created in a weird way, I am guessing PHP is getting an EOF before the file has even ended!