Shell Programming and Scripting

How can I get Parameters with Shell Request.
I mean so but not work:
PHP:

Code:

error_reporting(E_ALL);

$hallo ="Hallo Welt";
print_r(shell_exec("sh client.sh $hallo"));

Shell:

Code:

echo $hallo
echo ceck

Why doesn't it work? The PHP is OK. It runs client.sh with a couple parameters. If the problem is with client.sh then you'll need to paste that rather than the PHP code.

I have post the Shell script:


Its only:

Code:

 echo $hallo
echo ceck  
It display only ceck not "Hallo Welt"

Did i frorgot something?


I mean echo and the Variable $hallo display that.

Is the client.sh really a 'sh' or is it 'bash'?
Check the shebang of the file:

Code:

head -n1 client.sh

hth

You should have received an empty line and then "ceck". Your $hallo variable will be undefined in the subshell as you did not export it.

---------- Post updated at 14:28 ---------- Previous update was at 14:26 ----------

If you called the script with $hallo as the first positional parameter, you'd need to echo $1 instead of $hallo.

You parent process call subprocess

Code:

sh client.sh $hallo

On the shell subprocess you can handle arguments using variable 1, 2, 3 ...

So your subprocess script should be something like:

Code:

echo "arg1: $1"
echo "arg2: $2"
echo "argall: $*"
echo "argcnt: $#"
echo "myname: $0"

But command line is parsed using IFS = white space, so if your variable hallo include whitespaces, shell will split your value. If you like to keep whitespaces in your value, then you need to tell it: round the string using ' characters, you'll tell that "this is the string".

So your php include it:

Code:

<?php
$hallo ="Hallo Welt";
print_r(shell_exec("sh client.sh '$hallo'  "));
?>

It's also little risk to use sh. I'll tell exactly which shell I like to use: bash, ksh, dash, ... Usually sh is linked to the one of those, but on the older *nix it'll be Bourne Shell.

Example "I like to use bash to run my script":

Code:

<?php
$hallo ="Hallo Welt";
print_r(shell_exec("bash client.sh '$hallo'"));
?>

Or you can setup in your script (=correct method) which shell it need/has tested to use

Code:

#!/bin/ksh
echo hello world

And you setup execution privilege for script:

Code:

chmod a+rx client.sh

Then your php call "program", not script:

Code:

<?php
$hallo ="Hallo Welt";
print_r(shell_exec("client.sh '$hallo'"));
?>

And shell script will use that interpreter which you have set in the script.