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PHP __construct() Function

PHP SimpleXML Reference Complete PHP SimpleXML Reference

Definition and Usage

The __construct() function creates a new SimpleXMLElement object.

This function returns an object on success, and FALSE on failure.

Syntax

__construct(file,class,options,ns,is_prefix)

Parameter Description
xml Required. Specifies the XML document or XML data to use
options Optional. Specifies additional Libxml parameters. Is set by specifying the option and 1 or 0 (TRUE or FALSE, e.g. LIBXML_NOBLANKS(1))

Possible values:

  • LIBXML_COMPACT - Set small nodes allocation optimization. This may improve the application performance
  • LIBXML_DTDATTR - Set default DTD attributes
  • LIBXML_DTDLOAD - Load external subset
  • LIBXML_DTDVALID - Validate with the DTD
  • LIBXML_NOBLANKS - Remove blank nodes
  • LIBXML_NOCDATA - Set CDATA as text nodes
  • LIBXML_NOEMPTYTAG - Change 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 - Stop 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 excess namespace declarations
  • LIBXML_XINCLUDE - Use 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 (e.g. 20605 or 20617)
  • LIBXML_DOTTED_VERSION - Get dotted libxml version (e.g. 2.6.5 or 2.6.17)
is_url Optional. Specifies if the xml parameter is an URL. Default is FALSE
ns Optional
is_prefix Optional

Example

<?php
$xmlstring = <<<XML
<?xml version="1.0" encoding="ISO-8859-1"?>
<note>
<to>Tove</to>
<from>Jani</from>
<heading>Reminder</heading>
<body>Don't forget me this weekend!</body>
</note>
XML;

$xml = new SimpleXMLElement($xmlstring);

echo $xml->body[0];
?>

The output of the code above will be:

Don't forget me this weekend!

PHP SimpleXML Reference Complete PHP SimpleXML Reference
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