How to write the exec command(in PHP) output to a file? - php

Question

I will provide a example
i want the directory list to be written to a file
so i did this
<?php
$command="dir";
exec($command,$output);
//i want the directory list to be written to a file
// so i did this
$fp=fopen("file.txt","w");
fwrite($fp, $output);
//its actually writing the 0(return value for exec is int) to the file
// but i want the list of directories to be written to file
?>
its actually writing the 0(return value for exec is int) to the file
but i want the list of directories to be written to file
Please tell me a way to do that

Answer 1

You can simply use shell_exec:
<?php
$output = shell_exec('dir');
$fp=fopen("file.txt","w");
fwrite($fp, $output);
?>

Answer 2

i think that for your needle you should use the command "passthru".
Here an example:
<?php
$command = exec('dir', $outpout);
$data = "";
foreach($output AS $key=>$val){
$data .= $val . "\n";
}
$fp = fopen('file.txt', 'w') or die("i cant write...permission ?");
fwrite($fp, $data);
fclose($fp);
?>
Let me know if it works
Have a nice day
Antonio
P.S. Thanks Kevin

Answer 3

You can do it directly in the exec call (it's shorter) :
exec("dir > file.txt")
Anyway, your code is wrong because $output is an array.
Fixed code :
$command="dir";
exec($command,$output);
$fp=fopen("file.txt","w");
fwrite($fp, join("\n",$output))
And a shorter code :
exec("dir",$output);
file_get_contents("file.txt",join("\n",$output));