hi,
can any one say how to get the server name if we know the ipaddress
ie nslookup gives ipaddress if server name is given
in the same way can i have server name if i know ipaddress
thanks & regards
babu :o (1 Reply)
Dear All,
I am geting error while trying to stop managed server of WEB LOGIC through the command stop_wls managed1_wlsdom02.Can anyone tell me why I am geting this error?managed1_wlsdom02.pid exists at the path mentioned.
Do you need any other details?... (0 Replies)
I am using festival speech synthesis system and I would like to allow user input in a browser. This will be taken by a php page which is then supposed to pass the input text to a perl script. The perl script should pass this text to the festival engine by executing a unix command. this in turn... (2 Replies)
Hi friends,
Need your help. The question is:
1) We have directory '/SomeDirectory/SubDirectory'
2) And have symlink pointing to it like '/AnotherOneDirectory/symlink'
'/AnotherOneDirectory/symlink' -> '/SomeDirectory/SubDirectory'
3) Need to get real path without symlinks knowing only... (7 Replies)
the value of flag is reset inside the awk statments and is not getting echoed out of it. how can this be done??
#!/bin/ksh
flag=0
awk -F '' '$2 == "ABCD" && $6 == "MNOP"{flag=1}' file.xml
echo $flag
I am always getting the value of flag as "0" , even after the $2 is "ABCD" and $6 is... (2 Replies)
Hi all,
I got an idea to get a value (like Syscall or %comp details for example)dynamically from topas. Is there any way to do this. I guss there must be some door opened for this. I tried running topas and redirecting to a file but in vain.
The idea is, script should run topas in... (4 Replies)
I installed in VM the Mandriva Linux with 2.6.27 kernel.
But presently when I fire make the modules .ko does not get built.
I get the following output on firing command in the kernel module folder.
$ make
Building first_driver.c ... make: Entering directory... (1 Reply)
I have to find last delimiter in each line of a file and store the value after the last '/' in a variable in ksh script...Pls Pls help me:(The file is as shown below:
/opt/apps/cobqa/apps/abadv/bind/advc0007.bnd
/opt/apps/cobqa/apps/abbrio/bind/naac6115.bnd... (5 Replies)
Hello,
I need download a mp3 file from a site but I can not find the actual link. Thanks.
Source codes
<span title="what is" class="read"><embed type="application/x-shockwave-flash" src="au/audio.swf" width="17" height="13" align="texttop" quality="high" loop="false" menu="false"... (1 Reply)
Discussion started by: tara123
1 Replies
LEARN ABOUT PHP
unset
UNSET(3) 1 UNSET(3)unset - Unset a given variableSYNOPSIS
void unset (mixed $var, [mixed $...])
DESCRIPTION unset(3) destroys the specified variables.
The behavior of unset(3) inside of a function can vary depending on what type of variable you are attempting to destroy.
If a globalized variable is unset(3) inside of a function, only the local variable is destroyed. The variable in the calling environment
will retain the same value as before unset(3) was called.
<?php
function destroy_foo()
{
global $foo;
unset($foo);
}
$foo = 'bar';
destroy_foo();
echo $foo;
?>
The above example will output:
bar
To unset(3) a global variable inside of a function, then use the $GLOBALS array to do so:
<?php
function foo()
{
unset($GLOBALS['bar']);
}
$bar = "something";
foo();
?>
If a variable that is PASSED BY REFERENCE is unset(3) inside of a function, only the local variable is destroyed. The variable in the
calling environment will retain the same value as before unset(3) was called.
<?php
function foo(&$bar)
{
unset($bar);
$bar = "blah";
}
$bar = 'something';
echo "$bar
";
foo($bar);
echo "$bar
";
?>
The above example will output:
something
something
If a static variable is unset(3) inside of a function, unset(3) destroys the variable only in the context of the rest of a function. Fol-
lowing calls will restore the previous value of a variable.
<?php
function foo()
{
static $bar;
$bar++;
echo "Before unset: $bar, ";
unset($bar);
$bar = 23;
echo "after unset: $bar
";
}
foo();
foo();
foo();
?>
The above example will output:
Before unset: 1, after unset: 23
Before unset: 2, after unset: 23
Before unset: 3, after unset: 23
PARAMETERS
o $var
- The variable to be unset.
o $...
- Another variable ...
RETURN VALUES
No value is returned.
EXAMPLES
Example #1
unset(3) example
<?php
// destroy a single variable
unset($foo);
// destroy a single element of an array
unset($bar['quux']);
// destroy more than one variable
unset($foo1, $foo2, $foo3);
?>
Example #2
Using (unset) casting
(unset) casting is often confused with the unset(3) function. (unset) casting serves only as a NULL-type cast, for completeness. It
does not alter the variable it's casting.
<?php
$name = 'Felipe';
var_dump((unset) $name);
var_dump($name);
?>
The above example will output:
NULL
string(6) "Felipe"
NOTES
Note
Because this is a language construct and not a function, it cannot be called using variable functions.
Note
It is possible to unset even object properties visible in current context.
Note
It is not possible to unset $this inside an object method since PHP 5.
Note
When using unset(3) on inaccessible object properties, the __unset() overloading method will be called, if declared.
SEE ALSO isset(3), empty(3), __unset(), array_splice(3).
PHP Documentation Group UNSET(3)