How can I use sed to replace a ctrl character such as 'new line' (\0a) to something else? Or any other good command can do this job?
Thanks,
Hillxy (5 Replies)
Hi Friends,
Following is an output of a script
OPWQERIUTYKLSADFJHGXZNMCVBWQOPERIUTYKLSADFJHGXZNMCVB
I want to replace above string's 11 to 17 character by ******* (7 stars)
How can it be done?
Please somebody guide me. (6 Replies)
Hello,
I have a file with many lines with below format:
\abc\\1234
jkl\\567
def\\345
\pqr\\567
\xyz\\234
Here, i need to do 2 things.
1. replace \\ with \
2. remove starting \
so output to be as below: (11 Replies)
I want to append the following line to /var/spool/cron/root:
*/7 * * * * /root/'Linux CPU (EDF).sh' > /dev/null 2>&1
How to accomplish this using echo?
---------- Post updated at 04:09 PM ---------- Previous update was at 04:07 PM ----------
"Linux CPU (EDF)" is actually stored in a... (11 Replies)
I'm trying to parse out DNS logs from dozens of different domain controllers over a large period of time. The logs are rolled up into individual text files by size, which may contain only a portion of a day's activity or several day's worth (depending on amount of activity). I'm splitting them by... (4 Replies)
I tried to replace the following in vi:
old: 'e/thesis/pp/zones/zones'
new: 'd/so162/fix/pp'
For that, I used: :%s/e/thesis/pp/zones/zones/d/so162/fix/pp/g
but doesn't work, a trailing character error message appeared. How can I get it?
Thanks in advance (3 Replies)
Hi, I have a bash script and I am looking for a command that will merge specific lines together.
Sample Data:
registration time = 1300890272
Id = 1
setd = 0
tagunt = 26
tagId=6, length=8, value=
tagId=9, length=5, value=
tagId=7, length=2, value=
tagId=16, length=2, value=
tagId=32,... (8 Replies)
Hi,
I have a text file with some lines like this:
/MEDIA/DISK1/23568742.MOV
/MEDIA/DISK1/87456321.AVI
/MEDIA/DISK2/PART1/45753131.AVI
/IMPORT/44452.WAV
...
I want to remove the last 12 characters in each line that it ends "AVI". Should look like this:
/MEDIA/DISK1/23568742.MOV... (12 Replies)
Hi,
I have a text file which is output from a server and it lists all the files in a specific volume. However, the volume name appears as volume_name:.
I would like to replace this with \\volume_name\volume_name. This is not a problem in itself as I can use sed to globally look for the... (8 Replies)
Hello dears,
Please tell me how can I replace control characters with normal string. I have a file that contains normal string and ^A ^C control characters. I tried to use sed and awk without any luck.
sed 's/^A/foo/g' text > text1 //not worked
sed 's/\x01/foo/g' text > text1 ... (6 Replies)
Discussion started by: sembii
6 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)