Probably a simple one.
Basically I am retrieving a number from a file - setting a variable against it and then incrementing this by 1 and using this as an entry number in a log file for messages. I need the variable to re-evalute itself each time I call it so I get the latest number in the file -... (1 Reply)
I have variables:
FOO="Text"
BAR="FOO"
I'd like to be able to evaluate the variable named as the value of $BAR.
echo $FOO
Text
echo $BAR
FOO
This is what I'd like to do:
echo ${$BAR} (this won't work)
Text (3 Replies)
Let's say for example that we have two different ways was can code the exact same program to achieve the same result.
What is the best way to determine which of the two methods is the best solution?
Is it as simple as basing it on how long the program takes to run or is there a more... (4 Replies)
Hi, I am reading the contents of a file in variables as -
cat ${var_file_name} | while read COL1 COL2 COL3 COL4 COL5 COL6 COL7 COL8 COL9 COL10 COL11
The problem is ... my file can have any number of columns - 5, 10, 11 ....
So i want a dynamic variable list as -
cat ${var_file_name} |... (8 Replies)
Hello,
I have this:
#!/usr/bin/ksh
V1=ABC
str="hello 123;${V1}"
eval "echo $str"
i get
hello 123
/script.sh ABC not found
However eval works if $str variable doesn't contain a semicolumn (eg if str="hello 123~${v1}"
running the eval statement above would produce (2 Replies)
How to evaluate the value of a variable ?
For example:
a=var
$a=value !!!error happens!!!
I want to evaluate var=value, how to realize it?
Thanks!
---------- Post updated at 03:37 AM ---------- Previous update was at 02:22 AM ----------
I am using linux bash.
a=var
$a=value... (4 Replies)
In BASH, how does ||: get interpreted. I know || is logical or. And I believe : evaluates to true. Can someone give a thorough explanation for this usage?
Example
for i in $IGGY
do
&& skipdb=1 || : (6 Replies)
I am trying to write a simple function to select values from a database and assign them to variables. It can have any number of arguments sent into it, and I want to assign the value retrieved to a different variable name for each argument sent in. So my code looks something like this:
... (6 Replies)
I want to create a conditional expression string and pass in an awk script. My script is as below...
comm="\$3 == "hello""
awk -F "^T" -v command="${comm}" ' {
if ( command ) { print "hye" }
}' testBut the statement "if ( command )" always evaluates to true which is not... (5 Replies)
Hi There,
var1=value1
var2=value2
var3=value3
for (( i=1; i<4; i++ ))
do
temp=var$i
echo "$temp"
done
OUTPUT
var1
var2
var3
I want the output to be
value1
value2 (5 Replies)
Discussion started by: jagpreetc
5 Replies
LEARN ABOUT PHP
php_uname
PHP_UNAME(3) 1 PHP_UNAME(3)php_uname - Returns information about the operating system PHP is running onSYNOPSIS
string php_uname ([string $mode = "a"])
DESCRIPTION php_uname(3) returns a description of the operating system PHP is running on. This is the same string you see at the very top of the
phpinfo(3) output. For the name of just the operating system, consider using the PHP_OS constant, but keep in mind this constant will con-
tain the operating system PHP was built on.
On some older UNIX platforms, it may not be able to determine the current OS information in which case it will revert to displaying the OS
PHP was built on. This will only happen if your uname() library call either doesn't exist or doesn't work.
PARAMETERS
o $mode
-$mode is a single character that defines what information is returned:
o 'a': This is the default. Contains all modes in the sequence "s n r v m".
o 's': Operating system name. eg. FreeBSD.
o 'n': Host name. eg. localhost.example.com.
o 'r': Release name. eg. 5.1.2-RELEASE.
o 'v': Version information. Varies a lot between operating systems.
o 'm': Machine type. eg. i386.
RETURN VALUES
Returns the description, as a string.
EXAMPLES
Example #1
Some php_uname(3) examples
<?php
echo php_uname();
echo PHP_OS;
/* Some possible outputs:
Linux localhost 2.4.21-0.13mdk #1 Fri Mar 14 15:08:06 EST 2003 i686
Linux
FreeBSD localhost 3.2-RELEASE #15: Mon Dec 17 08:46:02 GMT 2001
FreeBSD
Windows NT XN1 5.1 build 2600
WINNT
*/
if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {
echo 'This is a server using Windows!';
} else {
echo 'This is a server not using Windows!';
}
?>
There are also some related Predefined PHP constants that may come in handy, for example:
Example #2
A few OS related constant examples
<?php
// *nix
echo DIRECTORY_SEPARATOR; // /
echo PHP_SHLIB_SUFFIX; // so
echo PATH_SEPARATOR; // :
// Win*
echo DIRECTORY_SEPARATOR; //
echo PHP_SHLIB_SUFFIX; // dll
echo PATH_SEPARATOR; // ;
?>
SEE ALSO phpversion(3), php_sapi_name(3), phpinfo(3).
PHP Documentation Group PHP_UNAME(3)