The DOMDocument::relaxNGValidateSource() function is an inbuilt function in PHP which is used to perform relaxNG validation on the document using a string as RNG schema. The difference between relaxNGValidate() and relaxNGValidateSource() is that the former accepts a rng schema filename whereas latter can accept a rng schema as string too.
Syntax:
bool DOMDocument::relaxNGValidateSource( string $source )
Parameters: This function accepts a single parameter $source which holds the RNG schema.
Return Value: This function returns TRUE on success or FALSE on failure.
Below given programs illustrate the DOMDocument::relaxNGValidateSource() function in PHP:
Program 1:
php
<?php// Create a new DOMDocument$doc = new DOMDocument;// RNG schema$RNG = "<element name=\"body\" xmlns=\"http://relaxng.org/ns/structure/1.0\"><zeroOrMore> <element name=\"div\"> <element name=\"h1\"> <text/> </element> <element name=\"h2\"> <text/> </element> </element></zeroOrMore></element>";// Load the XML$doc->loadXML("<?xml version=\"1.0\"?><body> <div> <h1>Heading 1</h1> <h2>Heading 2</h2> </div> <div> <h1>Heading 3</h1> <h2>Heading 4</h2> </div></body>");// Check if XML follows the relaxNG ruleif ($doc->relaxNGValidateSource($RNG)) { echo "This document is valid!\n";}?> |
Output:
This document is valid!
Program 2:
php
<?php// Create a new DOMDocument$doc = new DOMDocument;// RNG schema$RNG = "<element name=\"company\" xmlns=\"http://relaxng.org/ns/structure/1.0\"><zeroOrMore> <element name=\"employee\"> <element name=\"name\"> <text/> </element> <element name=\"salary\"> <text/> </element> </element></zeroOrMore></element>";// Load the XML$doc->loadXML("<?xml version=\"1.0\"?><company> <employee> <name>John Smith</name> <salary>Web</salary> </employee> <employee> <!-- Do not add salary to violate rule --> <name>John Doe</name> </employee></company>");// Check if XML doesn't follows the relaxNG ruleif (!$doc->relaxNGValidateSource($RNG)) { echo "This document is not valid!\n";}?> |
Output:
This document is not valid!
Reference: https://www.php.net/manual/en/domdocument.relaxngvalidatesource.php
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