As far as the script, you might consider indenting the info in loops and if statements to make the more readable.
Most scripts I've seen don't do:
and
Usually it's something like:
That way it's easier to see what code belongs with which part of a statement.
Yea, that while loop. I didn't realize it was a large as it was until I looked a little harder. It initially looked like an infinite loop.
And you're going to need to echo something to the mail statements. At least on the one I just tested it on, mail is looking for a body to pass along. So something like:
Also, $? is a numeric value so use "-eq" vs "=". It'll probably work but it's always good to use the correct syntax.
I have the following crontab entry to run a shell script for every 30 minutes of every day:
30 * * * * $HOME/main.sh > $HOME/main.log 2>$HOME/error.log
after I created the crontab file I have also done:
$crontab my_crontab
I also check to make sure it exists, by using the following... (11 Replies)
Please help - I have seen others ask this question but I need a simple example of using vi in a shell script. Once I enter VI the shell script does not execute the next commands until I q!. I invoke VI and start the edit process. I want to go to the third line and replace a character with a new... (2 Replies)
Hi, need help, I would like to know what is this IF statement trying to do? When the script is executing and error out with line 9 which is the IF statement line.
if ]
then
TOPDIR=$(pwd)
else
TOPDIR=${0%/*}
fi
TOPDIR=${TOPDIR%/*}
the log file.
Current system time is... (15 Replies)
I made a shell script to execute a server in screen mode.
# start server
screen -d -m -S Test ./application
echo "Program Started Successfully"
than I'm executing it from php by
echo shell_exec('/home/script.sh');
and it is giving me this error.
"cannot make directory... (1 Reply)
Hi,
I am having a shell script which has a while loop as shown below.
while
do
sleep 60
done
I am executing this script from Informatica ETL tool command task from where we can execute UNIX commands/scripts. When i do that, i am seeing 2 processes getting started for one script... (2 Replies)
Hi
As per my requirement when I run . ./file.sh am getting the following error
-bash:ELF: command not found
when i execute as ./file.sh it is getting executed.How to resolve this.
Thanks in advance. (3 Replies)
Hi every one, i am new to shell script. my people given a task to write a shell script that should execute number of shell scripts in that. in that, if any shell script is failed to execute, we have to run the main script again, but the script should start execute from the failed script only..
it... (1 Reply)
Hi every one, i am new to shell script. my people given a task to write a shell script that should execute number of shell scripts in that. in that, if any shell script is failed to execute, we have to run the main script again, but the script should start execute from the failed script only..
it... (6 Replies)
I have bash shell script which is internally calling python script.I would like to know how long python is taking to execute.I am not allowed to do changes in python script.Please note i need to know execution time of python script which is getting executed inside shell .I need to store execution... (2 Replies)
Discussion started by: Adfire
2 Replies
LEARN ABOUT PHP
eval
EVAL(3) 1 EVAL(3)eval - Evaluate a string as PHP codeSYNOPSIS
mixed eval (string $code)
DESCRIPTION
Evaluates the given $code as PHP.
Caution
The eval(3) language construct is very dangerous because it allows execution of arbitrary PHP code. Its use thus is discouraged.
If you have carefully verified that there is no other option than to use this construct, pay special attention not to pass any user
provided data into it without properly validating it beforehand.
PARAMETERS
o $code
- Valid PHP code to be evaluated. The code mustn't be wrapped in opening and closing PHP tags, i.e. 'echo "Hi!";' must be passed
instead of '<? echo "Hi!"; >'. It is still possible to leave and reenter PHP mode though using the appropriate PHP tags, e.g.
'echo "In PHP mode!"; ?>In HTML mode!<? echo "Back in PHP mode!";'. Apart from that the passed code must be valid PHP. This
includes that all statements must be properly terminated using a semicolon. 'echo "Hi!"' for example will cause a parse error,
whereas 'echo "Hi!";' will work. A return statement will immediately terminate the evaluation of the code. The code will be exe-
cuted in the scope of the code calling eval(3). Thus any variables defined or changed in the eval(3) call will remain visible
after it terminates.
RETURN VALUES eval(3) returns NULL unless return is called in the evaluated code, in which case the value passed to return is returned. If there is a
parse error in the evaluated code, eval(3) returns FALSE and execution of the following code continues normally. It is not possible to
catch a parse error in eval(3) using set_error_handler(3).
EXAMPLES
Example #1
eval(3) example - simple text merge
<?php
$string = 'cup';
$name = 'coffee';
$str = 'This is a $string with my $name in it.';
echo $str. "
";
eval("$str = "$str";");
echo $str. "
";
?>
The above example will output:
This is a $string with my $name in it.
This is a cup with my coffee in it.
NOTES
Note
Because this is a language construct and not a function, it cannot be called using variable functions.
Tip
As with anything that outputs its result directly to the browser, the output-control functions can be used to capture the output of
this function, and save it in a string (for example).
Note
In case of a fatal error in the evaluated code, the whole script exits.
SEE ALSO call_user_func(3).
PHP Documentation Group EVAL(3)