Hi,
I have a function or script like this.
show()
{
echo "Hi"
} | tee -a log
show
This creates a logfile and prints Hi in it. Now when I try to do the same for sql like this:
show()
{
sqlplus -s scott/tiger<<!
select * from details;
!
} | tee -a log
show
Then it gives me a... (2 Replies)
hi
could anybody please suggest me how to put a function memory for particular user.
say i am a user rao. want have a function foo in memory .
i have done this .typed the function function in the shell it worked for the session.but next time i do login its not there .
i can i have a... (6 Replies)
Hi
my shell is tcsh
can I have functions in my shell scripting?
Is the below shell script correct.
Can I have two functions and call one of them as required.
----------
echo "functions"
f1
f1 ()
{ echo "hello" }
f2 () (1 Reply)
Is it not a healthy practice to mix C and C++ standard I/O functions together
e.g.
string name; // this is a declared instance of the string class in C++
printf("\nPlease enter your name: ");
cin >> name;
I did something similar in a program Im designing, and used it several... (1 Reply)
I'm semi new to unix/linux and am trying to convert a program I wrote in C++ to a bash script. It's a program that prints Fibonacci's series. I have found scripts that will do it, but I'm trying persistently to get this one to work. The problem occurs when I try to return a value from the function.... (3 Replies)
Hi,
I am exploring with defining functions in my BASH shell scripts. However, I am bit confused about how to pass parameters to my functions. I was under the impression that you must do something like the following:
Define a function called "sample_function":
function sample_function {... (3 Replies)
Hi, im making a little script but need some help
Code i have so far is
read -p 'Bot Nickname:' ecnick
read -p 'Bot Username:' ecusername
read -p 'Bot Realname:' ecrealname
read -p 'Your Email:' ecemail
echo ''
echo Your bots nickname is set to $ecnick
echo Your bots username is set to... (2 Replies)
Hey I have a question....
what is the difference between using == vs -eq when testing in WHILE loops.
I use the following test that only worked with == signs....
if
why do i need == and not -eq?
2. I need to re-use some code in a couple places in this script. is functions my best... (5 Replies)
Hi All,
Can any one help me.
I am calling in a function2 with string as parameter from function1, the function1 gives 3 values. how i get the 3 values from funciton2 to function1. i have to give a return or something.
thanks in advance. (2 Replies)
I have 7 functions those need to be executed as command line inputs, I tried with below code it’s not executing function. If I run the ./script 2 then fun2 should execute , how to initiate that function I tried case and if else also, how to initiate function from command line
if
then... (8 Replies)
Discussion started by: saku
8 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)