<?php
/* 
BUG in PHP 4.2.1:
Leading white space is lost inside processing-instruction data, prior to first character after pi-target

output is:
bug
    php 4.2.1
bugpi_data=hello
end_pi_data

output SHOULD be:
bug
    php 4.2.1
bug

pi_data=
    hello
end_pi_data

*/

/// CODE TO REPRODUCE BUG

$q = '?';
$xmlSource = <<< EOD
<{$q}xml version="1.0"{$q}>
<bug>
    php 4.2.1
</bug>

<{$q}php
    hello
{$q}>
EOD;

$parser = xml_parser_create(); 
xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, 0); 
// this doesn't do anything:
xml_parser_set_option($parser, XML_OPTION_SKIP_WHITE, 0); 
xml_set_element_handler($parser, "start_element", "stop_element"); 
xml_set_character_data_handler($parser, "char_data"); 
xml_set_processing_instruction_handler( $parser, "_handlePI");
xml_parse( $parser, $xmlSource );

function _handlePI($parser, $target, $data) {
    echo("pi_data=".$data."end_pi_data"); exit;
}

function start_element($parser, $data, $attribs) {
echo $data;
}
function stop_element($parser, $data ) {
echo $data;

}
function char_data($parser, $data ) {
echo $data;
}
?>