Zend PHP 5.3 Certification Exam - ZCE - Which of the following functions in SimpleXML can be used to return an iterator containing ... - #182

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Question 2/36
Which of the following functions in SimpleXML can be used to return an iterator containing a list of all subnodes of the current node?
asXML()

children()

attributes()

getName()
Explanation: Answer option B is correct.

The children() function retrieves the child nodes of a specified XML node. It can be used to return an iterator containing a list of all subnodes of the current node. The syntax of the children() function is as follows:

class SimpleXMLElement
{
string children(ns, is_prefix)
}

where, ns is an XML namespace and is_prefix is a Boolean value that becomes TRUE if ns is regarded as a prefix.

Answer option A is incorrect. The asXML() function returns an XML string based on SimpleXML element. The syntax of the asXML function is as follows:

class SimpleXMLElement
{
string asXML(file)
}

where, when the file option is given, the asXML() function writes the string in a file instead of returning it.

Answer option D is incorrect. The getName() function is used to retrieve the name of an XML element from a SimpleXMLElement object. When it is successfully executed, it returns the name of the current XML element. The syntax of this function is as follows:

class SimpleXMLElement
{
string getName()
}

Answer option C is incorrect. The attributes() function is used to retrieve an XML elements attributes.

Reference: http://www.w3schools.com/php/php_ref_simplexml.asp
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