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xml_parser_set_option

(PHP 4, PHP 5, PHP 7, PHP 8)

xml_parser_set_optionSet options in an XML parser

Description

xml_parser_set_option(XMLParser $parser, int $option, string|int|bool $value): bool

Sets an option in an XML parser.

Parameters

parser

A reference to the XML parser to set an option in.

option

Which option to set. See below.

The following options are available:

XML parser options
Option constant Data type Description
XML_OPTION_CASE_FOLDING bool Controls whether case-folding is enabled for this XML parser. Enabled by default.
XML_OPTION_PARSE_HUGE bool Allows parsing documents larger than 10 MB. This option should only be enabled when the document size is bounded because this could otherwise lead to a DoS. This option is only available when using libxml2.
XML_OPTION_SKIP_TAGSTART integer Specify how many characters should be skipped in the beginning of a tag name.
XML_OPTION_SKIP_WHITE bool Whether to skip values consisting of whitespace characters.
XML_OPTION_TARGET_ENCODING string Sets which target encoding to use in this XML parser.By default, it is set to the same as the source encoding used by xml_parser_create(). Supported target encodings are ISO-8859-1, US-ASCII and UTF-8.

value

The option's new value.

Return Values

Returns true on success or false on failure.

Errors/Exceptions

Throws a ValueError when an invalid value is passed to option.

Prior to PHP 8.0.0, the function returned false when passing an invalid value to option generated a E_WARNING as well as making the function return false.

Changelog

Version Description
8.4.0 Added the option XML_OPTION_PARSE_HUGE.
8.3.0 The value parameter now also accepts booleans. The options XML_OPTION_CASE_FOLDING and XML_OPTION_SKIP_WHITE are now boolean options.
8.0.0 parser expects an XMLParser instance now; previously, a valid xml resource was expected.
8.0.0 A ValueError is now thrown if option is invalid.
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User Contributed Notes 3 notes

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2
www.thomaskoch.it
16 years ago
The option XML_OPTION_SKIP_WHITE has no effect in my PHP 5.2.6 (with expat-1.95.8-5). To skip cdata composed of white space only, simply check for that at the beginning of your cdata callback function:

<?php
function callback_cdata($parser, $cdata)
{
if(!
trim($cdata))
return;

// ... continue processing ...
}
?>
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1
pupeno at pupeno dot com
22 years ago
XML is case sensitive, then, from my point of view, disabling case folding doesn't goes against xml 1.0 specifications but the contrary, disabling case folding allow us to distiguish between diferent cases of the same letter ('a' and 'A') which of XML are two diferent things.
From my point of view, disabling case folding is a good practice and I think it should be disabled by default.
More information on:
http://www.isacat.net/2001/xml/case.htm
and
http://www.w3.org/TR/REC-xml
Thank you.
up
0
j[no_spam_please] at [thx]jessepearson dot net
17 years ago
In the function below, you need to update two lines if you don't want php to throw warnings.

change these two:
$elements[$index]['attributes'] = $tag['attributes'];
$elements[$index]['content'] = $tag['value'];

to this:
$elements[$index]['attributes'] = empty($tag['attributes']) ? "" : $tag['attributes'];
$elements[$index]['content'] = empty($tag['value']) ? "" : $tag['value'];
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