xml_set_processing_instruction_handler
PHP function
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(PHP 4, PHP 5, PHP 7, PHP 8)
Set up processing instruction (PI) handler
Description
xml_set_processing_instruction_handler(XMLParser $parser, callable|string|null $handler): true
Sets the processing instruction (PI) handler function for the XML parser parser.
A processing instruction has the following format:
xml
<?target
data
?>Caution
PHP code is delimited by the <?php processing instruction. As such it is possible to have PHP code within an XML document. However, the PI end tag (?>) must not be part of the data. If a PI end tag exists as part of the embedded PHP code, the rest of the PHP code and the "real" PI end tag, will be treated as character data.
Parameters
handlerDescription
The signature of the handler must be:
handler(XMLParser $parser, string $target, string $data): voidtargetThe processing instruction target.
dataThe processing instruction data.
Return Values
Always
Changelog
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