Can we print any string in reverse order?
For example:
oracle 16294 1 0 Aug 11 ? 0:00 ora_reco_crepd
oracle 16276 1 0 Aug 11 ? 0:19 ora_dbw0_crepd
I need second last column from this output. (0:00 & 0:19).
I can use awk print $2 after reversing the string.
... (4 Replies)
How to get the reverse parsing work.
I have a strings like
aqw-wef-324-err.log
wefd-324r-err.log
efrt-4rfr.log
.
.
i want to have string upto last hypen.
aqw-wef-324
wefd-324r
... (1 Reply)
Hi,
I am very new to perl.
My question:
How i can reverse the given string using substr function but without using reverse function in perl?
Anybody please help.
thanks,
-Lalit (3 Replies)
I have a file like this:
Dog Cat One ABCDEFGHIJ house
Dog Cat Two ABCDEFGHIJ house
Cat Cat One ABCDEFGHIJ house
Cat Cat Two ABCDEFGHIJ house
I want to look at $3 and if it says "Two" print out the line except reverse $4.
Dog Cat One ABCDEFGHIJ house
Dog Cat Two JIHGFEDCBA house ... (3 Replies)
Hi all,
I jus wanna print string b after reversing it. but the out put is blank. My code snippet is below. :wall:
int main()
{
char * a, * b;
b = new char;
a = new char;
int len, le;
le = 0;
cout<< " enter your string \n";
cin>> a;
len = strlen(a);
for(int i =... (8 Replies)
Guys,
I am trying to find a way to achieve this. I need to print /usr/local/apche/htdocs only from the string /usr/local/apache/htdocs/file.php using the regex. The below did not work. I know a solution with normal cut, I need a way to do this with the awk regex.
awk '/+file.php/' (6 Replies)
Hello,
Can anyone explain for me in this script to reverse the string?
1) the "x=x" part, how it works?
$ echo welcome | awk '{ for(i=length;i!=0;i--)x=x substr($0,i,1);}END{print x}'
$ emoclew2) x seems to be an array at the END, but can it automatically print the whole array in awk?
Thanks... (8 Replies)
Hi,
how to cut part of a string sing delimiter in reverse
input file
1,2,st-pa-tr-01,2,3,4,
2,3,ff-ht-05,6,7,8
how can i obtain strings till
st-pa-tr
ff-ht i.e cutting the last part og string -01 and -05
Thanks & Regards
Nivi
edit by bakunin: changed thread title (typo) (3 Replies)
Discussion started by: nivI
3 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)