Could someone please advise on a good way to implement error checking in a script?
i am taking input from a file, iserting it's values into two commands and sending the output of each to seperate log files. i need to check those log files for for an occurance of 'error', stop the command if... (3 Replies)
The rise of Video web stimulates more intuitive video feeling of large people, and makes video downloading becomes a popular trend in web times, meanwhile, more and more downloading problems arises correspondingly, in which the first trouble is slow downloading speed and incomplete downloading. It... (0 Replies)
Hello,
I've got next problem:
I want to examine at the beginning of a script in an if loop that:
1. Is there 4 parameters given
2. If first state is true then: is there switches -e and -d?
3. At the end, how can i indentify them as variebles regardlees to its order.
I was thinking like... (2 Replies)
Hello
I have srv RHEL5, file system UTDM (EMC DiskXtender Unix/Linux File System Manager 3.5 & EMC Centera).
it all works under the scheme: have disk is formatted with a file system UTDM, drive open network - NFS, it write data, then migrate the data in the repository - EMC Centera.
There are... (0 Replies)
I am trying to check the return status of a command thats encapsulated
in an <<EOF
#!/bin/ksh
set -x
xxx()
{
set -x
ls -lt /tmp/jdlkewjdlkewjdlkewjdlewjdlew<<EOT
ret=$?
EOT
echo "ret=$ret"
} >>$LOG 2>&1
LOG=/tmp/t2.out
rm -rf $LOG
echo "Starting process `date... (2 Replies)
Hi,
We have a user who cannot connect to the aix system anymore with hummingbird exceed.
Our unix servers are aix 5.3. She is running windows xp and using hummingbird 12.
She used to not have any problem, but now when she tries to use xstart she gets an error 'unable to connect to host using... (0 Replies)
HI. I was wondering if anyone can assist me in this. I have an HP-UX 11.31 server at work which keeps expiring my NIS password. I cannot log in unless I use root access. It worked before and I think some of the settings changed since then. My boss has told me that since we're taking some... (1 Reply)
Hi All,
I am trying to check if two variables have value assigned to it.
i am doing it like
if ]
then
echo "Please specify either single hostname or host file for the report"
usage
exit
fi
But its not working for it.Even i specify values for both variables it dont go... (6 Replies)
I have a bash script where I pass an argument
./chris.bash "\argv Test"
I want to detect if the user supplied \argv at the start of the argument (3 Replies)
Morning ..
I have a file with approximately 1000 lines. I want to check that the file contains, for example, 100 lines.
Something like whats given below is ugly. And even if I create a function I have to call it 100 times.
I may need to look through multiple files at times.
Is there a... (4 Replies)
Discussion started by: sumguy
4 Replies
LEARN ABOUT PHP
defined
DEFINED(3) 1 DEFINED(3)defined - Checks whether a given named constant existsSYNOPSIS
bool defined (string $name)
DESCRIPTION
Checks whether the given constant exists and is defined.
Note
If you want to see if a variable exists, use isset(3) as defined(3) only applies to constants. If you want to see if a function
exists, use function_exists(3).
PARAMETERS
o $name
- The constant name.
RETURN VALUES
Returns TRUE if the named constant given by $name has been defined, FALSE otherwise.
EXAMPLES
Example #1
Checking Constants
<?php
/* Note the use of quotes, this is important. This example is checking
* if the string 'TEST' is the name of a constant named TEST */
if (defined('TEST')) {
echo TEST;
}
?>
SEE ALSO define(3), constant(3), get_defined_constants(3), function_exists(3), The section on Constants.
PHP Documentation Group DEFINED(3)