Hi Everyone,
I am reading in a list of IDs from a file that is is chronological order. My current code in simplified form looks like this (ksh by the way)
IDS=`awk -F\| '{print $1}' inputfile.txt`
for i in $IDS
do
do various things with that ID
done
... (8 Replies)
Is it possible given a uid to determine information about the person with the uid? An example would be simple information regarding what group and the name of the person associated with that uid. It seems there is probably an easy staring me in the face but i cant seem to find it... (3 Replies)
If I have string { I_love_shell_scripts}
anyone knows how to have output {stpircs_llehs_evol_I}
by using shell and perl ?I know in perl, there is reverse() funcation, but
can it be done by not using reverse()? (3 Replies)
Hello
I'm writing script in awk that reverse order the fields of every line in file.
My script have problem with spaces - if there is more spaces between fields
in line of file - my script erase them .
I want my script work like command "tac" - how to change it ?
#!/bin/sh
file=$1... (1 Reply)
Hi Everyone....I am new to Unix and BASH programming...I just want to read a string and reverse it and display.....can anyone help me out???? (8 Replies)
ssh servername.com "echo /$APP=$BUSIN >> $URI; echo /$APP/*=$BUSIN >> $URI"
Ok for example here i ssh into a example servername.com, and I think what it does some line gets put into the urifile , my question is, how would i go about removing that in a script.
in summary, the above code is... (3 Replies)
Hi I want to reverse multiple lines from my file
eg of File1
3 4 5 6 7 8 9
a b c d e f g h
I am using this code to reverse lines but it can only work with one row
awk -F'\t' '{while (NF){printf("%s%s", $(NF--),!NF?"":FS)}}' File1 > File2
I want the file to look like this
9 8 7 6 5 4... (2 Replies)
Hi,
I have a file that looks like this (tab seperated):
read - DFHJ
read1 - IOPE
read2 + AAAB
read3 + MMMN
Basically what i want to do is reverse column 3 if column 2 has a - but leave it if its +
so the output would look like this:
read - JHFD
read1 - EPOI
read2 + AAAB... (3 Replies)
Hello, I am new to awk and I was wandering if I could reverse line and word order from a text file using awk. I figured out how to do them both separately, but can't quite figure out how to mix them.
Example:
Input file:
dog cat mouse
1 2 3
I am new to awk
Output of the awk program:... (3 Replies)
My input is:
hello how are you
my chemistry book is lost
what is up
etc...
And I want the output to be:
you are how hello
lost is book chemistry my
up is what
....
I found an earlier response to a similar question but it was not accurate as it required a certain string length for each line (2 Replies)
Discussion started by: Heidi Heweidy
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)