Before I even attempt this, is it possible to grep for a pattern, maybe a partial sentence like "go to page 3", assign that to a variable and then use awk or something to pull out the 3 and assign it to a variable? So first I would have
Gotopg = "go to page 3"
then
page = 3 (9 Replies)
Hi,
I have some problem in assigning values to variables: This is what Iam literally doing:
i=0
input=test
temp$i = $input
In the sense, I try to assign the value in the variable input (ie., test) to another variable temp0 (since i is assigned 0, temp$i is temp0). Seems simple, but I get... (3 Replies)
Hi,
Is there any way to assign defaults values to the shell variables without reassigning them ( restarting the session)
for example
after login the value of ORACLE_HOME=/a/b/c
i have changed this value from the console
export ORACLE_HOME=/c/d
now what if i want the value exported to... (1 Reply)
Hi GUYS,
I have function. I am assigning a line count to count variable. But it is throwing an error at this line.
function_recur (){
#file being created in this function
lenth = `wc -l function_outpu.dat`;
echo $lenth;
}
this is the error i got
rec.ksh: lenth: not found.
... (3 Replies)
Hi Gurus,
I have a file named log with 2 lines
Each line is a file name. eg
$ cat log
monday
tuesday
I need to read log and assign each output(filename) to a different variable.
The following doesn't work:-
while read A B
do
echo " a is ${A} "
echo " b is ${B} "
done <... (6 Replies)
Hi,
I made an executable file in terminal and it looks like this.
echo Enter the name of the file without the .wig extension
read NAME
echo Enter the ratio
read RATIO
awk '{$2*=$RATIO;{print $0}}' ${NAME}.wig > ${NAME}normalized.wig
I have a file with several million lines that look... (6 Replies)
i have variables RECIPIENTS_DEVL,RECIPIENTS_UACC,RECIPIENTS_PROD
i have a case statement to get the phase variable:
case ${WMD_UPHASE1} in
u) WMD_UPHASE4=UACC;;
i) WMD_UPHASE4=DEVL;;
p) WMD_UPHASE4=PROD;;
d) WMD_UPHASE4=DEVL;;
*) WMD_UPHASE4=DEVL;;
esac
I am unable to... (3 Replies)
Hi,
Can the below be clarified please. i just want to know what is the difference between the two ways of assigning variables as mentioned below.
export SRC_TBL=${SRC_TBL-"MMA_COPAY_PLN_FACT_STG"}
export SRC_TBL="MMA_COPAY_PLN_FACT_STG"
thanks in advance :)
Arun (1 Reply)
Discussion started by: Arun Mishra
1 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)