The XMLWriter::startDtdAttlist() function is an inbuilt function in PHP which is used to start DTD AttList. DTD stands for Document Type Definition which defines the structure and the legal elements and attributes of an XML document. In a DTD, attributes are declared with an ATTLIST declaration.
Syntax:
bool XMLWriter::startDtdAttlist( string $name )
Parameters: This function accepts a single parameter $name which holds the attribute list name.
Return Value: This function returns TRUE on success or FALSE on failure.
Below examples illustrate the XMLWriter::startDtdAttlist() function in PHP:
Example 1:
<?php   // Create a new XMLWriter instance $writer = new XMLWriter();    // Create the output stream as PHP    // Start the document $writer->startDocument('1.0', 'UTF-8');   // Start the Dtd Attlist $writer->startDtdAttlist('hello');    // End the Dtd Attlist $writer->endDtdAttlist();    // End the document $writer->endDocument(); ?> |
Output: Press Ctrl+U to see the XML
Example 2:
<?php   // Create a new XMLWriter instance $writer = new XMLWriter();    // Create the output stream as PHP    // Start the document $writer->startDocument('1.0', 'UTF-8');   // Start the Dtd Attlist $writer->startDtdAttlist(     'This_is_not_visible_in_webpage');    // End the Dtd Attlist $writer->endDtdAttlist();    // Add text to the document $writer->text('neveropen');    // End the document $writer->endDocument(); ?> |
Output:
neveropen
Reference: https://www.php.net/manual/en/function.xmlwriter-start-dtd-attlist.php
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