I'm finding the following command very tedious to type in all the time, so I created a one line bash script called mount.bash with the following contents:
mount -t cifs //mark/C\$ -o unc=//mark\\C$,ip=10.1.1.33,user=Administrator,password=$1 /mnt/mark
I don't like the fact that I have to put... (5 Replies)
Hi ..
I have a dynamic script called from a programming language called Powerhouse (4GL).
The module, called QUIZ, allows the user to call shell commands from within it...
i.e.
!rm -f mipss156t2cmd1.bat mipss156t2tmp1.txt
!printf '#!/bin/csh\n' > mipss156t2cmd1.bat
!printf 'setenv... (0 Replies)
Hi...
Actually, I want to pass a few variables to the function and print it. But, its looks like not working. Could some body help me how could i do that ?... below is my program...
#!/usr/bin/ksh
usage()
{
echo "Usage: $0 -n -a -s -w -d"
exit
}
rename()
{
echo "rename $1 $2"... (5 Replies)
Hi Gurus,
Iam new to Unix.
I had a requirement where i should use a file for example
Host.sh or Host.txt
Host = 555.254.45.14
username = aaaa
pwd = SSSSSS123
And this file need to be used in different scripts.
For example i have script1.sh
where i want to use the values of... (6 Replies)
Hi!I'm trying to write a script in C that Asterisk must call: I would to pass to the script a number digited by the user, make some elaboration with it and then pass the result to Asterisk. I don't understand the mechanism used by Asterisk to pass variable to/from a script: I know that variables... (1 Reply)
HI all
I am calling a script "b" from script "a". In script "a", i connect to database and get month and year. I have to pass these same values to script b. How can i do that. How can i pass parameters from one script to another (3 Replies)
I know that we can call system command to execute shell script in awk.
but it does not return the result of the command executed , but only returns
the value of the command executoin status ( 1/0 --> failure / success).
Could anyone let me know how to solve this problem. (9 Replies)
I use csh a lot but I don't really write csh scripts. Now I have a need to implement a security check (written in perl; verify an user input security code) into a csh script. Here is the senario:
#csh
1. call the perl script
2. if the perl script returns 'true', pass on;
if the perl... (1 Reply)
Hi All,
I need to frame a unix script to logon to a unix box. The credentials needs to be obtained from a property file on the same location.
I am trying to use 'expect' and 'spawn' command to meet this req.
When I am passing values, these commands are working fine. but when I am trying to... (3 Replies)
Below are three variables, which I want to pass into variable RESULT1
username1=userid
poihostname1=dellsys.com
port1=8080
How can I pass these variables into below code...
RESULT1=$((ssh -n username1@poihostname1 time /usr/sfw/bin/wget --user=sam --password=123 -O /dev/null -q... (4 Replies)
Discussion started by: manohar2013
4 Replies
LEARN ABOUT PHP
empty
EMPTY(3) 1 EMPTY(3)empty - Determine whether a variable is emptySYNOPSIS
bool empty (mixed $var)
DESCRIPTION
Determine whether a variable is considered to be empty. A variable is considered empty if it does not exist or if its value equals FALSE.
empty(3) does not generate a warning if the variable does not exist.
PARAMETERS
o $var
- Variable to be checked
Note
Prior to PHP 5.5, empty(3) only supports variables; anything else will result in a parse error. In other words, the follow-
ing will not work: empty(trim($name)). Instead, use trim($name) == false.
No warning is generated if the variable does not exist. That means empty(3) is essentially the concise equivalent to !isset($var)
|| $var == false.
RETURN VALUES
Returns FALSE if $var exists and has a non-empty, non-zero value. Otherwise returns TRUE.
The following things are considered to be empty:
o "" (an empty string)
o 0 (0 as an integer)
o 0.0 (0 as a float)
o "0" (0 as a string)
o NULL
o FALSE
o array() (an empty array)
o $var; (a variable declared, but without a value)
CHANGELOG
+--------+---------------------------------------------------+
|Version | |
| | |
| | Description |
| | |
+--------+---------------------------------------------------+
| 5.5.0 | |
| | |
| | empty(3) now supports expressions, rather than |
| | only variables. |
| | |
| 5.4.0 | |
| | |
| | Checking non-numeric offsets of strings returns |
| | TRUE. |
| | |
+--------+---------------------------------------------------+
EXAMPLES
Example #1
A simple empty(3) / isset(3) comparison.
<?php
$var = 0;
// Evaluates to true because $var is empty
if (empty($var)) {
echo '$var is either 0, empty, or not set at all';
}
// Evaluates as true because $var is set
if (isset($var)) {
echo '$var is set even though it is empty';
}
?>
Example #2
empty(3) on String Offsets
PHP 5.4 changes how empty(3) behaves when passed string offsets.
<?php
$expected_array_got_string = 'somestring';
var_dump(empty($expected_array_got_string['some_key']));
var_dump(empty($expected_array_got_string[0]));
var_dump(empty($expected_array_got_string['0']));
var_dump(empty($expected_array_got_string[0.5]));
var_dump(empty($expected_array_got_string['0.5']));
var_dump(empty($expected_array_got_string['0 Mostel']));
?>
Output of the above example in PHP 5.3:
bool(false)
bool(false)
bool(false)
bool(false)
bool(false)
bool(false)
Output of the above example in PHP 5.4:
bool(true)
bool(false)
bool(false)
bool(false)
bool(true)
bool(true)
NOTES
Note
Because this is a language construct and not a function, it cannot be called using variable functions.
Note
When using empty(3) on inaccessible object properties, the __isset() overloading method will be called, if declared.
SEE ALSO isset(3), __isset(), unset(3), array_key_exists(3), count(3), strlen(3), The type comparison tables.
PHP Documentation Group EMPTY(3)