I need the line printed with echo to append to eof of to exactly line, am i able to do that?
i mean
echo "sysctl -w lalala=1" > to end of file /etc/sysctl.conf
or to the 21st line, if the line exist, open new line and insert text there.
Thx.maybe i'm in wrong topic but anyway... (2 Replies)
without using ls, just using echo so purely pattern matching
I can say echo */ <-- lists directories
but how would I match files? surely something like *!/ or * but neither work ?
it seems like there isn't much that I can put in but surely i should be able to put any ascii... (1 Reply)
Hello All,
I'm very new to scripting and I'm writing a very simple script to restart a couple processes because I'm getting to lazy to cd between directories.
This is pretty much my first script and I just want to add a little cosmetics to it.
Here's what I have:
#!/bin/ksh
echo... (5 Replies)
Hallo,
I need to test a String (a special ip number-string).
So I want to run that:
ipadress=172.0.0.0
# for debugging:
echo $ipadress | egrep -e '172\.?\.??\.??$'
# the test that doesnt work
if test -z `echo $ipadress | egrep -e '172\.?\.??\.??$'` != ""
then
echo "match"
else... (1 Reply)
I have entry in the my .profile like below, but still i see $PWD is not defied in my system
export PS1=$LOGNAME@`hostname`':'$PWD'>'
echo $PWD also gives me nothing, my env list also give no entry for PWD.Can someone help me setting PWD variable.
I use /bin/sh (9 Replies)
Hi:
how come this command does not work? the error message is:
xargs: cd: No such file or directory
yet, in the same time, 'echo dir_path | xargs ls' works.
Does it work in bash? We use csh.
Thanks.
NB Phil (7 Replies)
Hi,
When I run:
echo "\033I see hi in color, but if I run this color is not shown, why?
(echo "\033Thanks
Israel.
---------- Post updated at 05:17 AM ---------- Previous update was at 04:43 AM ----------
DONE!!
I had to run more -v.
Thanks (4 Replies)
Hi,when I run my first shell script,I got something that doesn't work right.
I wrote this code in the script.
echo -e "Hello,World\a\n"But the screen print like this:
-e Hello,World
The "-e" wasn't supposed to be printed out.
Can anyone help me out?:wall:
Many thanks!:) (25 Replies)
Hello,
I have to add a new line at the end of a File on Solaris-System:
I think my script should be right, because I evaluated it to other threads. However the script does not what I am expected it should do.
My file might look like this:
Line1
Line2
Line3
And my script could... (7 Replies)
Discussion started by: Timo_HR
7 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)