PHP Tutorial - PHP SimpleXMLElement Create

The __construct() function creates a new SimpleXMLElement object.

Syntax

__construct(data,options,data_is_url,ns,is_prefix);

Parameter

Parameter	is required	Description
data	Required.	A well-formed XML string or the path or URL to an XML document if data_is_url is TRUE
options	Optional.	Additional Libxml parameters. Is set by specifying the option and 1 or 0 (TRUE or FALSE, e.g. LIBXML_NOBLANKS(1))
data_is_url	Optional.	TRUE specifies that data is a path/URL to an XML document instead of string data. Default is FALSE
ns	Optional.	A namespace prefix or URI
is_prefix	Optional.	A Boolean value. TRUE if ns is a prefix. FALSE if ns is a URI. Default is FALSE

Possible values for options:

LIBXML_COMPACT - Activate nodes allocation optimization (may speed up application)
LIBXML_DTDATTR - Set default DTD attributes
LIBXML_DTDLOAD - Load external subset
LIBXML_DTDVALID - Validate with the DTD
LIBXML_NOBLANKS - Remove blank nodes
LIBXML_NOCDATA - Merge CDATA as text nodes
LIBXML_NOEMPTYTAG - Expand empty tags (e.g. <br/> to <br></br>), only available in the DOMDocument->save() and DOMDocument->saveXML() functions
LIBXML_NOENT - Substitute entities
LIBXML_NOERROR - Do not show error reports
LIBXML_NONET - Disable network access while loading documents
LIBXML_NOWARNING - Do not show warning reports
LIBXML_NOXMLDECL - Drop the XML declaration when saving a document
LIBXML_NSCLEAN - Remove redundant namespace declarations
LIBXML_PARSEHUGE - Sets XML_PARSE_HUGE flag, which relaxes any hardcoded limit from the parser. This affects limits like maximum depth of a document and limits of the size of text nodes
LIBXML_XINCLUDE - Implement XInclude substitution
LIBXML_ERR_ERROR - Get recoverable errors
LIBXML_ERR_FATAL - Get fatal errors
LIBXML_ERR_NONE - Get no errors
LIBXML_ERR_WARNING - Get simple warnings
LIBXML_VERSION - Get libxml version
LIBXML_DOTTED_VERSION - Get dotted libxml version

Return

Returns a SimpleXMLElement object that represents data.

Example

Create a new SimpleXMLElement object, then output the content of the body node:


<?php/*from w w  w .  ja  v a 2s .  c o  m*/
$note=<<<XML
<?xml version="1.0" encoding="ISO-8859-1"?>
<book>
    <name>PHP</name>
    <name>Java</name>
</book>
XML;

$xml=new SimpleXMLElement($note);
echo $xml->body;
?>

Example 2

Assume we have the following XML file, "note.xml":

<?xml version="1.0" encoding="ISO-8859-1"?>
<?xml version="1.0" encoding="ISO-8859-1"?>
<book>
    <name>PHP</name>
    <name>Java</name>
</book>

Create a SimpleXMLElement object from a URL:


<?php
$xml=new SimpleXMLElement("note.xml",NULL,TRUE);
echo $xml->asXML();
?>