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Top Forums Shell Programming and Scripting grep files without header and move to new dir Post 302221486 by joeyg on Monday 4th of August 2008 02:08:26 PM
Old 08-04-2008
Hammer & Screwdriver exit 0

This is the 'appropriate way' of writing a script.
(a) there is a clear end to the program
(b) it returns a value of zero

The second part probably requires more explanation.

Code:
# main program
blah-blah commands

# calls to another script
chk_headers
if [ "$?" -ne 0 ]
   then
   echo "Error in processing chk_headers"
   exit
fi
# calls to another script
blah-blah more stuff

exit

My main program calls and executes the 'chk_headers' script. When 'chk_headers' completes, it may return a non-zero condition. My main program checks for this. The standard is to return 0 (zero) unless an error.

Sometimes, clever programmers use this passed variable to have a sub-program (child) give some value back to the calling (parent) program.
 

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SIMPLEXML_IMPORT_DOM(3) 						 1						   SIMPLEXML_IMPORT_DOM(3)

simplexml_import_dom - Get a SimpleXMLElementobject from a DOM node.

SYNOPSIS
SimpleXMLElement simplexml_import_dom (DOMNode $node, [string $class_name = "SimpleXMLElement"]) DESCRIPTION
This function takes a node of a DOM document and makes it into a SimpleXML node. This new object can then be used as a native SimpleXML element. PARAMETERS
o $node - A DOM Element node o $class_name - You may use this optional parameter so that simplexml_import_dom(3) will return an object of the specified class. That class should extend the SimpleXMLElement class. RETURN VALUES
Returns a SimpleXMLElement or FALSE on failure. Warning This function may return Boolean FALSE, but may also return a non-Boolean value which evaluates to FALSE. Please read the section on Booleans for more information. Use the === operator for testing the return value of this function. EXAMPLES
Example #1 Importing DOM <?php $dom = new DOMDocument; $dom->loadXML('<books><book><title>blah</title></book></books>'); if (!$dom) { echo 'Error while parsing the document'; exit; } $s = simplexml_import_dom($dom); echo $s->book[0]->title; ?> The above example will output: blah SEE ALSO
dom_import_simplexml(3), "Basic SimpleXML usage". PHP Documentation Group SIMPLEXML_IMPORT_DOM(3)
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