Hi,
I am stuck with extracting values by combining 2 dynamically extracted values.
The code goes like this
#!/usr/bin/ksh
ID1="abcd"
i=1 #this is a dynamic value and keeps on changing
b="ID" #this is static
now i want the value of ID1 variable.
like echo $b$i
But echo... (1 Reply)
Hello,
Can somebody please give me a snippet for the below requirement.
I want to assign the values separeted by a comma to be assigned to a dynamic array.
If I give an input (read statement) like abc1,abc2,abc3,abc4,abc5, all these strings abc* should be assigned to an array like below... (2 Replies)
How do I assign values to reference variables?
I am assigning a variable name to --> $user_var
Then I am trying to change its underlying variable value by
$((user_var))=$user_value .. its failing,,
Please let me know if there is a way to do this dynamically..
FileA.props... (5 Replies)
I found one post in another site with a solution for my problem
the below solution should explain what I want.
#!/bin/sh
first="one"
second="two"
third="three"
myvar="first"
echo ${!myvar}
But this gives error 'bad substitution'
System info
SunOS sundev2 5.9... (3 Replies)
hi
i have an input file in which there are diffrent values for xxxx,yyyyyy,zzzzzzz how can i arrange the dynamic values of x,y&z in a row.
input file:
xxxxx 1
yyyyyy 4
yyyyyy 5
zzzzzzzz 7
yyyyyy 13
zzzzzzzz 7
zzzzzzzz 6
yyyyyy 14
yyyyyy 12
zzzzzzzz 4
yyyyyy 4
yyyyyy 5
yyyyyy 6... (6 Replies)
Hi all,
We have requirement to generate load timing based on subject areas HOUSEHOLD, BANKING and TRADING. These values are stored in an array SUB_ARR
SUB_ARR=("HOUSEHOLD" "BANKING" "TRADING")
Based on indicator files produced while processing data for each type, we need to get the stats (using... (2 Replies)
I have a small program which needs to pass variable dynamically to form the name of a second variable whose value wil be passed on to a third variable.
***************** Program Start ******************
LOC1=/loc1
PAT1IN=/loc2
PAT2IN=/loc3
if ; then
for fpattern in `cat... (5 Replies)
Hi,
I am trying to incorporate 2 functions into my `awk` command.
I want to lower case Column 2 (which is essentially the same information in Col1, except in Col1 I want to maintain the capitalization) and I want to count from 0-N that begins and ends with the start of certain markers that I... (6 Replies)
Hi Guys,
I am using a function to replace the values dynamically to frame sql query by reading a file. My file will have column names like
file.txt
col_1
col_2
expected output:
select id,col_1,col_2 from (
select a.id,
a.col_1,
rank() over (ORDER BY cast(a.col_1 AS double)... (5 Replies)
Hi All,
We have a requirement of picking nth position value by using cut command. value would be delimited by any symbols. We have to pass delimited value and postition to get the value in a string.
ex.
echo "A,B,C,D,E" |cut -d "," -f3
echo "A|B|C|D|E"|cut -d "|" -f2
Kindly frame the... (5 Replies)
Discussion started by: KK230689
5 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)