I have a script that occasionally has a command here and there that fails and I would like to set my script up to just re run the command if the exit code is 1.
Is there a simple way to do that without if/thens or redirecting to the command again? (5 Replies)
Hi Guys,
I have requirement where if the script fails at a particular point, then the script should run from that particular point itslf..
could anyone help me out from this..
Thanks (5 Replies)
Hi!
I have this situation with 3 shellscripts.
One is a "startscript" that simply calls other scripts. This one is scheduled with cron to run at regular intervals. That script runs what I'll refer to as Script 1.
Script 1 in turn runs script 2 (import_catalogs_buyer.sh)
Sometimes, seemingly... (2 Replies)
I want to write a script that log all the failed processes and start the same process.
For that I have already write a script that gives all the PID
#!/bin/ksh
pid= `ps -ef |grep "ov" |grep -v "grep"| awk '{print $2}'`
echo $pid
if ;
then
echo "process is running"
else
echo... (4 Replies)
I need to list all the failed log in users as part of audit report. How can I do so in Linux to find all the audit log records and then upload to a table for future reference. I am using oracle 10g on Linux. Hope I will get a quick response from the experts.
Thanks in advance for the tips. (3 Replies)
Hi, I put a for loop in a script to eject backup tapes from the robot. The command echo' output goes to the log file without problem, but command vmchange's output does not go to the log file although it's working fine. It still displays on the screen. I've tried '2>&1 1>$log', but nothing changed.... (5 Replies)
Hi,
I have a Kshell script that is failed if i am using the -x option.
$ cat ListOfFiles.lst
\+DATA_DM01/pudwh/datafile/dw_billing_tts_1
\+DATA_DM01/pudwh/datafile/dw_billing_tts_2 ... (2 Replies)
Hi ,
I'd like to give you a little bit idea about my script which is used to get any generated file from remote server using ftp session then organized those file into directories based on their date ( at the end I supposed to have 1 months directories 20130401 20130402 ....20130430 ,... (27 Replies)
I'm using CentOS 7 and I would like to know of a way to read each line and search for a specific word. For example, if it finds the word "Fail" it sends it to a variable, and pipes it to a folder on the network.
What would be the best way in making this work in a Linux environment?
I wrote a... (1 Reply)
Discussion started by: SysAdminRialto
1 Replies
LEARN ABOUT PHP
substr
SUBSTR(3) 1 SUBSTR(3)substr - Return part of a stringSYNOPSIS
string substr (string $string, int $start, [int $length])
DESCRIPTION
Returns the portion of $string specified by the $start and $length parameters.
PARAMETERS
o $string
- The input string. Must be one character or longer.
o $start
- If $start is non-negative, the returned string will start at the $start'th position in $string, counting from zero. For
instance, in the string ' abcdef', the character at position 0 is ' a', the character at position 2 is ' c', and so forth. If
$start is negative, the returned string will start at the $start'th character from the end of $string. If $string is less than or
equal to $start characters long, FALSE will be returned.
Example #1
Using a negative $start
<?php
$rest = substr("abcdef", -1); // returns "f"
$rest = substr("abcdef", -2); // returns "ef"
$rest = substr("abcdef", -3, 1); // returns "d"
?>
o $length
- If $length is given and is positive, the string returned will contain at most $length characters beginning from $start (depend-
ing on the length of $string). If $length is given and is negative, then that many characters will be omitted from the end of
$string (after the start position has been calculated when a $start is negative). If $start denotes the position of this trunca-
tion or beyond, false will be returned. If $length is given and is 0, FALSE or NULL, an empty string will be returned. If
$length is omitted, the substring starting from $start until the end of the string will be returned.
Example #2
Using a negative $length
<?php
$rest = substr("abcdef", 0, -1); // returns "abcde"
$rest = substr("abcdef", 2, -1); // returns "cde"
$rest = substr("abcdef", 4, -4); // returns false
$rest = substr("abcdef", -3, -1); // returns "de"
?>
RETURN VALUES
Returns the extracted part of $string; or FALSE on failure, or an empty string.
CHANGELOG
+--------------+---------------------------------------------------+
| Version | |
| | |
| | Description |
| | |
+--------------+---------------------------------------------------+
|5.2.2 - 5.2.6 | |
| | |
| | If the $start parameter indicates the position |
| | of a negative truncation or beyond, false is |
| | returned. Other versions get the string from |
| | start. |
| | |
+--------------+---------------------------------------------------+
EXAMPLES
Example #3
Basic substr(3) usage
<?php
echo substr('abcdef', 1); // bcdef
echo substr('abcdef', 1, 3); // bcd
echo substr('abcdef', 0, 4); // abcd
echo substr('abcdef', 0, 8); // abcdef
echo substr('abcdef', -1, 1); // f
// Accessing single characters in a string
// can also be achieved using "square brackets"
$string = 'abcdef';
echo $string[0]; // a
echo $string[3]; // d
echo $string[strlen($string)-1]; // f
?>
Example #4
substr(3) casting behaviour
<?php
class apple {
public function __toString() {
return "green";
}
}
echo "1) ".var_export(substr("pear", 0, 2), true).PHP_EOL;
echo "2) ".var_export(substr(54321, 0, 2), true).PHP_EOL;
echo "3) ".var_export(substr(new apple(), 0, 2), true).PHP_EOL;
echo "4) ".var_export(substr(true, 0, 1), true).PHP_EOL;
echo "5) ".var_export(substr(false, 0, 1), true).PHP_EOL;
echo "6) ".var_export(substr("", 0, 1), true).PHP_EOL;
echo "7) ".var_export(substr(1.2e3, 0, 4), true).PHP_EOL;
?>
The above example will output:
1) 'pe'
2) '54'
3) 'gr'
4) '1'
5) false
6) false
7) '1200'
ERRORS /EXCEPTIONS
Returns FALSE on error.
Example #5
<?php
var_dump(substr('a', 1)); // bool(false)
?>
SEE ALSO strrchr(3), substr_replace(3), preg_match(3), trim(3), mb_substr(3), wordwrap(3), String access and modification by character.
PHP Documentation Group SUBSTR(3)