PHP | XMLReader setParserProperty() Function Last Updated : 28 Apr, 2025 Comments Improve Suggest changes Like Article Like Report The XMLReader::setParserProperty() function is an inbuilt function in PHP which is used to set parser options. This function can be used to validate the document.Syntax: bool XMLReader::setParserProperty( int $property, bool $value ) Parameters: This function accepts two parameters as mentioned above and described below: $property: It specifies an integer corresponding to one of Parser Option constants as given below: XMLReader::LOADDTD (1) This will load DTD but does not validate.XMLReader::DEFAULTATTRS (2) This will load DTD and default attributes but does not validate.XMLReader::VALIDATE (3) This will load DTD and validate while parsing.XMLReader::SUBST_ENTITIES (4) This will substitute entities and expand references.$value: It specifies whether to enable or disable the property. Return Value: This function returns TRUE on success or FALSE on failure.Below examples illustrate the XMLReader::setParserProperty() function in PHP:Example 1: data.xml html <?xml version="1.0" encoding="utf-8"?> <div> <h1> Sample XML </h1> </div> index.php php <?php // Create a new XMLReader instance $XMLReader = new XMLReader(); // Open the XML file with sample XML $XMLReader->open('data.xml'); // Set the Parser Property $XMLReader->setParserProperty(XMLReader::VALIDATE, true); // Check if XMLReader::VALIDATE is set or not $isProperty = $XMLReader->getParserProperty(XMLReader::VALIDATE); if ($isProperty) { echo 'Property is set.'; } ?> Output: Property is set. Program 2: data.xml html <?xml version="1.0"?> <!-- DTD rules to be followed by XML--> <!DOCTYPE html [ <!ELEMENT html (h1, p, heading, body)> <!ELEMENT h1 (#PCDATA)> <!ELEMENT p (#PCDATA)> <!ELEMENT heading (#PCDATA)> <!ELEMENT body (#PCDATA)> ]> <!-- XML starts from here --> <html> <h1>Hi</h1> <p>World</p> <heading>GeeksforGeeks</heading> <body>Web Portal for Geeks</body> </html> index.php php <?php // Create a new XMLReader instance $XMLReader = new XMLReader(); // Open the XML file $XMLReader->open('data.xml'); // Enable the Parser Property $XMLReader->setParserProperty(XMLReader::VALIDATE, true); // Iterate through the XML nodes while ($XMLReader->read()) { if ($XMLReader->nodeType == XMLREADER::ELEMENT) { // Check if XML is valid or not $isValid = $XMLReader->isValid(); if ($isValid) { echo "YES ! this node is validated<br>"; } } } ?> Output: YES ! this node is validated YES ! this node is validated YES ! this node is validated YES ! this node is validated YES ! this node is validated Reference: https://www.php.net/manual/en/xmlreader.setparserproperty.php Comment More infoAdvertise with us Next Article PHP | XMLReader setParserProperty() Function gurrrung Follow Improve Article Tags : Web Technologies PHP PHP-function PHP-XML Similar Reads PHP | XMLReader read() Function The XMLReader::read() function is an inbuilt function in PHP which is used to move to next node in document. 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