Programming PHP

Example 11-8. Creating a parser (continued)
xml_set_processing_instruction_handler($parser, 'processing_instruction');
xml_set_default_handler($parser, 'default');
return array($parser, $fp);
}
function parse ($parser, $fp) {
$blockSize = 4 * 1024; // read in 4 KB chunks
while($data = fread($fp, $blockSize)) { // read in 4 KB chunks
if(!xml_parse($parser, $data, feof($fp))) {
// an error occurred; tell the user where
echo 'Parse error: ' . xml_error_string($parser) . " at line " .
xml_get_current_line_number($parser));
return FALSE;
}
}
return TRUE;
}
if (list($parser, $fp) = create_parser('test.xml')) {
parse($parser, $fp);
fclose($fp);
xml_parser_free($parser);
}
Errors
The xml_parse( ) function will return true if the parse completed successfully or
false if there was an error. If something did go wrong, use xml_get_error_code( ) to
fetch a code identifying the error:
$err = xml_get_error_code( );
The error code will correspond to one of these error constants:
XML_ERROR_NONE
XML_ERROR_NO_MEMORY
XML_ERROR_SYNTAX
XML_ERROR_NO_ELEMENTS
XML_ERROR_INVALID_TOKEN
XML_ERROR_UNCLOSED_TOKEN
XML_ERROR_PARTIAL_CHAR
XML_ERROR_TAG_MISMATCH
XML_ERROR_DUPLICATE_ATTRIBUTE
XML_ERROR_JUNK_AFTER_DOC_ELEMENT
XML_ERROR_PARAM_ENTITY_REF
XML_ERROR_UNDEFINED_ENTITY
XML_ERROR_RECURSIVE_ENTITY_REF
XML_ERROR_ASYNC_ENTITY
272 | Chapter 11: XML
This is the Title of the Book, eMatter Edition
Copyright © 2002 O’Reilly & Associates, Inc. All rights reserved.