Hi,
Q1: are the variables in shell script usually UPPER CASE?
Q2: can sed output to the same file that it's using it?
eg. cat sameFile | sed 's/here/there/g' > sameFile ?
I expect the sed replace all "here" to "there" and change it in sameFile.
i tried that one, the sameFile... (1 Reply)
Hello,
I have a file where I am supposed to convert all the single i characters to uppercase, but when I try, it converts all the i's inside of words to uppercase as well.
I tried doing:
cat filename | sed 's/i/I/g'
but that obviously does not work.
Any help would be greatly... (6 Replies)
The file dbnames.txt has 5 columns, what i'm trying to do is that when the fifth column equals A, store in the variable "access" the word, "admin access". If it equals B, then "business access" etc. I think their is a problem with my sed command, because it is not substibstituting the words... (1 Reply)
I need to remove a pattern say, ABCD whether it is in uppercase or lowercase from a string. How to do it using SED?
for example
ABCDEF should output to EF
abcdEF should also output to EF (2 Replies)
I am getting a parameter from a user and I need to use it to search and return the matching line numbers in a file. I am using this code:
recordNumber="$(sed -n '/'"$entry"'/{
=
d
}' unixdb1.txt)"
where $entry is the passed search parameter. The problem is I need to ignore the case. ... (3 Replies)
Hi
I want to make string substitution ignoring case for search but respecting case for subtitute. Ex changing all occurences of "original" in a file to "substitute":
original becomes substitute
Origninal becomes Substitute
ORIGINAL becomes SUBSTITUTE
I know this a little special but it's not... (1 Reply)
Hi,
I have a file named "test_file" that has the below content. It has words in upper/lower cases
PRODOPS
prodOPS
ProdOps
PRODops
escalate
Shell
My requirement is to replace all the "prodops" (what ever case it may be) with "productionoperations".
I tried using the "i" option with... (7 Replies)
i have something like this in a file
cat onlytables.sql
create table NextID (
id int auto_increment,
zoneID int,
entityName varchar(64),
nextID int,
lastModified TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
primary... (6 Replies)
Experts,
Good day!,
I have following data, I want to filter 3rd Field, if it is in UPPERCASE,
aa aa1 HOST1
aa bb1 host2
aa cc1 SERV1
aa dd1 SERV2
ab aa1 host3
The output should be:
aa aa1 HOST1
aa cc1 SERV1
aa dd1 SERV2 (2 Replies)
Dears,
In the below string, please let me know how to make the sed search case-incensitive. I have more such lines in my script instead of let me know any other easier option.
sed -n '/dn: MSISDN=/,/^\s*$/p' full.ldif > temp ; sed -n... (4 Replies)
Discussion started by: Kamesh G
4 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)