Stackoverflow Duplicates under the PHP tag.

stackoverflow-duplicates.md

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properties as array (Jan 2012)
Access an Array Returned by a Function (Nov 2009)
PHP syntax for dereferencing function result (Apr 2009)
PHP: Access Array Value on the Fly (Apr 2008)

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PHP - Access first index of array of SimpleXML::xpath function (Mar 2012)
SimpleXMLElement get first XPath Element in one line (May 2010)
Selecting only the first item of an xpath result set in PHP (May 2010)