I am looking to interpret these two points in the scripts:-
1)
I do not understand when its doing test='echo $?', what is assigned in this step to test
$? is a special variable, the return code of the last command. The return code is a number, zero for success, anything else for error.
...but they didn't need to use backticks `` (same key as ~) to get it into the variable test. Commands in backticks become strings, so you could do things like LINE=`grep username /etc/passwd` to read a matching line from a file into a variable.
What I figured out is it's sending stderr and stdout to the log file. Is that what its doing?
Depends what command is, of course. The redirections are sending all its output into the log file, yes.
What the script is doing, is running command over and over until it succeeds. When it fails, it must be returning 2, since that's what the loop checks for, and when it does, it keeps running it until it returns (in $?) something else.
We use a UNIX-based system (Lawson) at work and I was given this command to request a data extract from the db admin. The only thing I really understand is the last line as it appears to be joining the files created from the first three lines into one. Is there anyone who can help me breakdown the... (4 Replies)
# sub: find block (in cols), return line-numbers (begin-end) or 0 if notfound
sub findb{
my ($exp1,$col1,$exp2,$col2)= @_; # $exp = expression to find, $col - column to search in
my $cnt=0;
my ($val1,$val2);
my ($beg,$end);
for($cnt=1;$cnt<=65536;$cnt++){
$val1 =... (3 Replies)
i am analyzing a query written by another developer ,need to understand part of script
am looking at a code ..and it converts comma files to pipe delimited and also takes away quotes from any columns,
source field format: 2510,"Debbie",NewYork
changes to
target: 2510|Debbie|NewYork
... (1 Reply)
Can someone explain what is happening line by line in this script, particularly after the do statement. The script works, it renames all the files in my directory that has a date in the file name. But I would like to know more about it.
#!/bin/bash
newdate=12-10-1995
for file in *--*
do
... (6 Replies)
i am trying to understand this script example. the text does not explain it. can someone tell me briefly what each of the functions do. any help will be appreciated.
#!/bin/bash
killtree() {
local _pid=$1
local _sig=${2-TERM}
for _child in $(ps -o pid --no-headers --ppid... (1 Reply)
Hi,
New to this forum, as well as to unix scripting..need help to understand below script ...
sendNotice_sp()
{
ATTACH=${LNXLOG:-}
if ; then
if ; then
mail -s "$ERR_MSG" $ERR_EMAIL_TO < $ATTACH
fi
else
mail -s "$ERR_MSG" $ERR_EMAIL_TO < /dev/null
fi
}
afaik this is sm kind of... (6 Replies)
Could someone please help me in understanding the code below:
#!/usr/bin/ksh
Month=`date|cut -c5-7`
Day=`date|cut -c9-10`
Year=`date|cut -c27-28`
Rom2Jul() { case $Month in Feb) Day=$(( $Day+31 ));;
Mar) Day=$((... (27 Replies)
Below script is called as Reducer, I am not sure how it work, can some expert explain me what this script does as i am a beginner.
inputfile:
hi hi how are are you
code:
#!/bin/bash
lastkey=""; -- what does this mean, because i saw in debug mode it is taking value as hi
count=0;... (13 Replies)
Hello,
How come the following script adds each numeric value to a total sum ?
x=$1
func()
{
for i in $1 $2 $3; do
let x= $x+$i
done }
func "8 8 8" 9 9
echo $x
A.How the program sums the string "8 8 8" if it`s only the first field value ($1)?
B.If we define x to be $1... (3 Replies)
Discussion started by: uniran
3 Replies
LEARN ABOUT PHP
forward_static_call_array
FORWARD_STATIC_CALL_ARRAY(3) 1 FORWARD_STATIC_CALL_ARRAY(3)forward_static_call_array - Call a static method and pass the arguments as arraySYNOPSIS
mixed forward_static_call_array (callable $function, array $parameters)
DESCRIPTION
Calls a user defined function or method given by the $function parameter. This function must be called within a method context, it can't
be used outside a class. It uses the late static binding. All arguments of the forwarded method are passed as values, and as an array, sim-
ilarly to call_user_func_array(3).
PARAMETERS
o $function
- The function or method to be called. This parameter may be an array, with the name of the class, and the method, or a string,
with a function name.
o $parameter
- One parameter, gathering all the method parameter in one array.
Note
Note that the parameters for forward_static_call_array(3) are not passed by reference.
RETURN VALUES
Returns the function result, or FALSE on error.
EXAMPLES
Example #1
forward_static_call_array(3) example
<?php
class A
{
const NAME = 'A';
public static function test() {
$args = func_get_args();
echo static::NAME, " ".join(',', $args)."
";
}
}
class B extends A
{
const NAME = 'B';
public static function test() {
echo self::NAME, "
";
forward_static_call_array(array('A', 'test'), array('more', 'args'));
forward_static_call_array( 'test', array('other', 'args'));
}
}
B::test('foo');
function test() {
$args = func_get_args();
echo "C ".join(',', $args)."
";
}
?>
The above example will output:
B
B more,args
C other,args
SEE ALSO forward_static_call(3), call_user_func(3), call_user_func_array(3), is_callable(3), information about the callback type.
PHP Documentation Group FORWARD_STATIC_CALL_ARRAY(3)