In PHP, an XML parser refers to a tool that allows us to read, manipulate, and extract information from XML files using PHP code. An XML parser takes an XML document as input, then reads and interprets the document's structure and content, and allows us to extract the information as needed.
PHP offers several built-in XML parsers, such as SimpleXML and DOMDocument, enabling us to easily manipulate XML data in a PHP app. These parsers provide a simple and easy-to-use API to work with XML data in PHP, and they handle most of the low-level details of parsing and processing XML documents.
PHP xml_parser_get_option() Function
The following depicts the syntax for the xml_parser_get_option() function.
xml_parser_get_option(XMLParser $parser, int $option): string|int
The function accepts two main parameters:
parser- this refers to a reference to the XML parser from which to get the target option.option- specifies the option to fetch. Popular options include:
| Option | Description |
|---|---|
XML_OPTION_CASE_FOLDING |
Set whether to use case-folding for element and attribute names |
XML_OPTION_SKIP_TAGSTART |
Set how many bytes to skip at the start of each element |
XML_OPTION_SKIP_WHITE |
Set whether to skip white space at the start of each element |
XML_OPTION_TARGET_ENCODING |
Set the output encoding for the parser |
XML_OPTION_USE_INTERNAL_ERRORS |
Set whether to use internal XML parser errors or not |
The function will return false if the parser does not have the defined parser option.
Example
The following example demonstrates how to use the xml_parser_get_option() function to gather options from a PHP XML parser.
<?php
// Initialize the XML parser
$parser = xml_parser_create();
// Set some options
xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, false);
xml_parser_set_option($parser, XML_OPTION_SKIP_TAGSTART, 10);
xml_parser_set_option($parser, XML_OPTION_SKIP_WHITE, true);
xml_parser_set_option($parser, XML_OPTION_TARGET_ENCODING, 'UTF-8');
xml_parser_set_option($parser, XML_OPTION_USE_INTERNAL_ERRORS, true);
// Fetch the current option values
$case_folding = xml_get_parser_option($parser, XML_OPTION_CASE_FOLDING);
$skip_tagstart = xml_get_parser_option($parser, XML_OPTION_SKIP_TAGSTART);
$skip_white = xml_get_parser_option($parser, XML_OPTION_SKIP_WHITE);
$target_encoding = xml_get_parser_option($parser, XML_OPTION_TARGET_ENCODING);
$use_internal_errors = xml_get_parser_option($parser, XML_OPTION_USE_INTERNAL_ERRORS);
// Display the option values
echo "XML_OPTION_CASE_FOLDING: " . ($case_folding ? "true" : "false") . "\n";
echo "XML_OPTION_SKIP_TAGSTART: " . $skip_tagstart . "\n";
echo "XML_OPTION_SKIP_WHITE: " . ($skip_white ? "true" : "false") . "\n";
echo "XML_OPTION_TARGET_ENCODING: " . $target_encoding . "\n";
echo "XML_OPTION_USE_INTERNAL_ERRORS: " . ($use_internal_errors ? "true" : "false") . "\n";
// Clean up
xml_parser_free($parser);
?>
The example above creates an XML parser, sets some options using xml_parser_set_option(), fetches the current values of the options using xml_get_parser_option(), and then displays the option values using echo.
Finally, it frees the parser using xml_parser_free().
NOTE: You may need to enable the XML Parser extension on your environment before using this function.
Conclusion
In this post, you learned how you can use the xml_parser_get_option() function to gather information about various XML Parser options.
We hope you enjoyed this post. Check out our other PHP tutorials in the sections below.
