Bug #17114: xml_parse_into_struct takes too long, sometimes crashes IIS

From: bbisgod@hotmail.com Operating system: Windows NT4 PHP version: 4.2.0 PHP Bug Type: *XML functions Bug description: xml_parse_into_struct takes too long, sometimes crashes IIS Running PHP4.2.0 on IIS on NT4 server. I am trying to parse large XML files with PHP. When I run the code on a smaller 66kb file, it runs with the desired affects. But when I try to run it on a large file (around 2mb), it takes its time doing xml_parse_into_struct. Also, sometimes the PHP script can make the memory usage of IIS spiral uncontrollably, and the CPU usage is maxed out. Please help, or tell me whats wrong Thanks in advance INDEX.PHP --------- <? include("func.php"); $time = getmicrotime(); ?> <HTML> <BODY> <FORM method=post action="index.php" enctype="multipart/form-data"> <INPUT type=file name="XML"><BR> <SELECT size=10 name="folderfile"> <? $handle=opendir("../xml/"); while ($file = readdir($handle)) { if ($file != "." && $file != "..") { echo "<option>$file"; } } closedir($handle); ?> </SELECT> <INPUT type=submit value='Convert'> </FORM> <? $XML = ""; if (is_uploaded_file($_FILES['XML']['tmp_name'])) { $fp = fopen($_FILES['XML']['tmp_name'],"r") or DIE("Error opening XML"); $XML .= fread($fp,filesize($_FILES['XML']['tmp_name'])); fclose($fp); } else { if ($_POST['folderfile'] != "") { $fp = fopen("../xml/".$_POST['folderfile'],"r") or DIE("Error opening XML"); $XML .= fread($fp,filesize("../xml/".$_POST['folderfile'])); fclose($fp); } } if ($XML != "") { echo "Time to read: ".round(getmicrotime()-$time,2)."<BR>"; $time = getmicrotime(); if (preg_match("/^<\?xml/i",$XML)) { $XML = preg_replace("/^<\?xml.+\?>/","",$XML); } else { die("Invalid XML format"); } $tree = GetXMLTree($XML); unset($XML); echo "Time to array: ".round(getmicrotime()-$time,2)."<BR>"; $time = getmicrotime(); if (!$tree) { die("Invalid XML (Err: Error parseing XML)"); } $path = array_shift($tree); array_shift($tree); array_shift($tree); array_shift($tree); foreach($tree as $key => $val) { if (!is_array($tree[$key])) { DIE("Invalid XML (Err: Loop page)"); } parse_page($tree[$key], $path); } unset($tree); echo "Time to parse: ".round(getmicrotime()-$time,2)."<BR>"; } ?> </BODY> </HTML> --EOF-- FUNC.PHP -------- <? function GetChildren($vals, &$i) { $children = array(); if ($vals[$i]['value']) array_push($children, $vals[$i]['value']); while (++$i < count($vals)) { switch ($vals[$i]['type']) { case 'cdata': array_push($children, $vals[$i]['value']); break; case 'complete': $children[$vals[$i]['tag']] = $vals[$i]['value']; break; case 'open': $children[] = GetChildren($vals,$i); break; case 'close': return $children; break; } } } function GetXMLTree($XML) { echo "Creating parser... "; $p = xml_parser_create(); echo "Setting enctype... "; xml_parser_set_option($p, XML_OPTION_TARGET_ENCODING, "UTF-8"); echo "Parsing... "; xml_parse_into_struct($p, stripslashes($XML), $vals, $index); echo "Closing parser... "; xml_parser_free($p); unset($index); $i = 0; return GetChildren($vals, $i); } function getmicrotime() { list($usec, $sec) = explode(" ",microtime()); return ((float)$usec + (float)$sec); } function parse_page($page, $folder) { $file = $folder."\\".array_shift($page).".LDF<BR>"; echo "<PRE>"; print_r($page); echo "</PRE>"; } ?> --EOF-- -- Edit bug report at http://bugs.php.net/?id=17114&edit=1 -- Fixed in CVS: http://bugs.php.net/fix.php?id=17114&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=17114&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=17114&r=needtrace Try newer version: http://bugs.php.net/fix.php?id=17114&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=17114&r=support Expected behavior: http://bugs.php.net/fix.php?id=17114&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=17114&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=17114&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=17114&r=globals