The ;; are in the wrong place, they should be after the fi which terminates your if statement. In a case statement the ;; terminates each separate condition.
Quote:
*) echo "please enter correct value" read ;;
break;;
The last two lines are a bit iffy. Probably best to just output an error message because the script is going to ask the question again on the next iteration of the "while true" loop (if you move the question to within the loop). Also, lose the break;; line because it is totally out of context.
Add the "esac" to complement the original "case".
Add the "done" to complement the original "do".
The initial question to populate $answer should probably be inside the do-done loop or the users will neve get the chance to change the value.
Hi,
I have a script like below :
#!/bin/ksh
echo "Do you want to export all docs ?"
read alld
echo "Do you want to export template or report only "
read temr
case && ]
#arguments
;;
case && ]
#arguments
;;
case && ]
#arguments
;; (4 Replies)
hi, i will like to know whether awk command can ignore case?
i written a script that will take in user input and search for data on the 1st field from a text file.
echo -n "Title:"
read title
awk -F":" '$1~/'"$title"'/{print $0}' Filename
read ans
return
... (5 Replies)
I'm trying to run the logic below but get a `<' is not matched error message when I return a Y or y;
printf "Run this ? : "
read RESP
case $RESP in
Y|y)
cat <<EOF > file
today is Monday
EOF ;;
N|n)
exit 1 ;;
esac
Any ideas? (2 Replies)
i want to get user input like this
please tell which option to chose
1. mango 2. tango 3. rango
if user chooses mango
then it should execute a set of statements and again ask like this
what do you want to do
1.add 2.subtract 3.exit
when i choose exit it should goto my previous... (1 Reply)
Hi,
In my script it takes the input from the user. i.e. sys or system.
How can i make it case insensitive in my code.
if || ; then
echo "valid"
Any help is appreciated.
Thanks,
priya (4 Replies)
This is supposed to be a simple bank script. Whenever I try the case construct options it wont work for the deposit option after typing the amount it just goes straight back into the menu, same with withdrawal option. Option 3 which should just display the balance amount doesn't echo anything. The... (2 Replies)
Hi All,
I have script which will take the parameter as
PNLYYYYMMDD/PNL
or PNL-AMDYYYYYMMDD/PNL-AMD
now based on YYYYMMDD my script will parse and do some logic within
my case statement looks like below
case `echo $1 | tr '' ''`
in
pnl*) do some logic;;
pnl-amd*) do some logic;;... (2 Replies)
I need to Write a shell script that allows some system-administration tasks to be preformed automatically from a menu-driven interface. with automated following tasks:
Copy directory tree
Delete files or directories
Output Information (this part is done )
*Copy directory tree
The “Copy... (2 Replies)
have written the below code to check whether the string received from user is a file name or dir using case statement, but its going into default case*).
#!/bin/sh
#Get a string from user and check whether its a existing filename or not
rm str2
rm str3
echo "enter a file \c"
read fil... (8 Replies)
I'm having an issue with bash read input when using a case statement.
The script halts and doesn't read the input on the first loop. if I hit enter then the scripts starts to respond as expected. Need some help here.
defaultans=8hrs
read -e -i $defaultans -p "${bldwht}How long would you like... (5 Replies)
Discussion started by: woodson2
5 Replies
LEARN ABOUT PHP
create_function
CREATE_FUNCTION(3) 1 CREATE_FUNCTION(3)create_function - Create an anonymous (lambda-style) functionSYNOPSIS
string create_function (string $args, string $code)
DESCRIPTION
Creates an anonymous function from the parameters passed, and returns a unique name for it.
Caution
This function internally performs an eval(3) and as such has the same security issues as eval(3). Additionally it has bad perfor-
mance and memory usage characteristics.
If you are using PHP 5.3.0 or newer a native anonymous function should be used instead.
PARAMETERS
Usually these parameters will be passed as single quote delimited strings. The reason for using single quoted strings, is to protect the
variable names from parsing, otherwise, if you use double quotes there will be a need to escape the variable names, e.g. $avar.
o $args
- The function arguments.
o $code
- The function code.
RETURN VALUES
Returns a unique function name as a string, or FALSE on error.
EXAMPLES
Example #1
Creating an anonymous function with create_function(3)
You can use this function, to (for example) create a function from information gathered at run time:
<?php
$newfunc = create_function('$a,$b', 'return "ln($a) + ln($b) = " . log($a * $b);');
echo "New anonymous function: $newfunc
";
echo $newfunc(2, M_E) . "
";
// outputs
// New anonymous function: lambda_1
// ln(2) + ln(2.718281828459) = 1.6931471805599
?>
Or, perhaps to have general handler function that can apply a set of operations to a list of parameters:
Example #2
Making a general processing function with create_function(3)
<?php
function process($var1, $var2, $farr)
{
foreach ($farr as $f) {
echo $f($var1, $var2) . "
";
}
}
// create a bunch of math functions
$f1 = 'if ($a >=0) {return "b*a^2 = ".$b*sqrt($a);} else {return false;}';
$f2 = "return "min(b^2+a, a^2,b) = ".min($a*$a+$b,$b*$b+$a);";
$f3 = 'if ($a > 0 && $b != 0) {return "ln(a)/b = ".log($a)/$b; } else { return false; }';
$farr = array(
create_function('$x,$y', 'return "some trig: ".(sin($x) + $x*cos($y));'),
create_function('$x,$y', 'return "a hypotenuse: ".sqrt($x*$x + $y*$y);'),
create_function('$a,$b', $f1),
create_function('$a,$b', $f2),
create_function('$a,$b', $f3)
);
echo "
Using the first array of anonymous functions
";
echo "parameters: 2.3445, M_PI
";
process(2.3445, M_PI, $farr);
// now make a bunch of string processing functions
$garr = array(
create_function('$b,$a', 'if (strncmp($a, $b, 3) == 0) return "** "$a" '.
'and "$b"
** Look the same to me! (looking at the first 3 chars)";'),
create_function('$a,$b', '; return "CRCs: " . crc32($a) . ", ".crc32($b);'),
create_function('$a,$b', '; return "similar(a,b) = " . similar_text($a, $b, &$p) . "($p%)";')
);
echo "
Using the second array of anonymous functions
";
process("Twas brilling and the slithy toves", "Twas the night", $garr);
?>
The above example will output:
Using the first array of anonymous functions
parameters: 2.3445, M_PI
some trig: -1.6291725057799
a hypotenuse: 3.9199852871011
b*a^2 = 4.8103313314525
min(b^2+a, a^2,b) = 8.6382729035898
ln(a)/b = 0.27122299212594
Using the second array of anonymous functions
** "Twas the night" and "Twas brilling and the slithy toves"
** Look the same to me! (looking at the first 3 chars)
CRCs: -725381282, 342550513
similar(a,b) = 11(45.833333333333%)
But perhaps the most common use for of lambda-style (anonymous) functions is to create callback functions, for example when using
array_walk(3) or usort(3)
Example #3
Using anonymous functions as callback functions
<?php
$av = array("the ", "a ", "that ", "this ");
array_walk($av, create_function('&$v,$k', '$v = $v . "mango";'));
print_r($av);
?>
The above example will output:
Array
(
[0] => the mango
[1] => a mango
[2] => that mango
[3] => this mango
)
an array of strings ordered from shorter to longer
<?php
$sv = array("small", "larger", "a big string", "it is a string thing");
print_r($sv);
?>
The above example will output:
Array
(
[0] => small
[1] => larger
[2] => a big string
[3] => it is a string thing
)
sort it from longer to shorter
<?php
usort($sv, create_function('$a,$b','return strlen($b) - strlen($a);'));
print_r($sv);
?>
The above example will output:
Array
(
[0] => it is a string thing
[1] => a big string
[2] => larger
[3] => small
)
SEE ALSO
Anonymous functions.
PHP Documentation Group CREATE_FUNCTION(3)