PHP simplexml_load_string() Function

In this chapter you will learn:

1. Description for PHP simplexml_load_string() Function
2. Syntax for PHP simplexml_load_string() Function
3. Parameter for PHP simplexml_load_string() Function
4. Return for PHP simplexml_load_string() Function
5. Example - Convert a well-formed XML string into a SimpleXMLElement object
6. Example - Output the data from each element in the XML string
7. Example - Output the element's name and data for each child node in the XML string

Description

The simplexml_load_string() function converts a well-formed XML string into a SimpleXMLElement object.

Syntax

Syntax for PHP simplexml_load_string() Function has the following syntax.

Parameter

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 on success. FALSE on failure.

Example 1

Convert a well-formed XML string into a SimpleXMLElement object, then output keys and elements of the object:

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

$xml=simplexml_load_string($note);
print_r($xml);
?>

The code above generates the following result.

Example 2

Output the data from each element in the XML string:

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

$xml=simplexml_load_string($note);
echo $xml->to . "\n";
echo $xml->from . "\n";
echo $xml->heading . "\n";
echo $xml->body;
?>

Example 3

Output the element's name and data for each child node in the XML string:

<?php/*from  ja v  a2s.co  m*/
$note=<<<XML
<?xml version="1.0" encoding="ISO-8859-1"?>
<book>
    <name>PHP</name>
    <name>Java</name>
</book>
XML;

$xml=simplexml_load_string($note);
echo $xml->getName() . "\n";

foreach($xml->children() as $child){
   echo $child->getName() . ": " . $child . "\n";
}
?>

The code above generates the following result.

Next chapter...

What you will learn in the next chapter:

1. Description for PHP xpath() Function
2. Syntax for PHP xpath() Function
3. Parameter for PHP xpath() Function
4. Return for PHP xpath() Function
5. Example - runs an XPath query on the XML document

PHP SimpleXMLElement Create

PHP addAttribute() Function

PHP addChild() Function

PHP asXML() Function

PHP attributes() Function

PHP children() Function

PHP SimpleXML count() Function

PHP getDocNamespaces() Function

PHP getName() Function

PHP getNamespaces() Function

PHP registerXPathNamespace() Function

PHP simplexml_import_dom() Function

PHP simplexml_load_file() Function

PHP simplexml_load_string() Function

PHP xpath() Function