xmldoc() takes ages

On Mon, 5 May 2003, Terence wrote:

Yes, that's necessary, and not only in multithreaded applications, also in multi-process applications like the Apache webserver. But those questiosn really belong on the php-general@lists.php.net mailinglist. Derick

flock and fcntl predate the multi-threaded approach on Unix and as such they have process granularity, i.e. they won't help in multi-threaded environments. - Sascha

I'v already started developing an object wrapper to DOM XML for my own usage (but freely available to anyone as with all my stuff) which provides a central point where I can control the way all this file accessing is done. Here is the constructor method alone plus the constant definitions preceeding the class. This code has not been tested yet. /** * Constructor method * * Create the objDoc instance property and associated ndRoot property based * on the user-selected mode of document creation. In the process, establish * the blnIsReadOnly property. * * @param mixed information required to create a DOM document * @param int constant specifying how the document is to be created * @return void */ function domDoc(&$Starter,$intUse = DOMDOC_AS_NEW) { $this->objErr = new xmlErrorLog($this); $this->intMode = $intUse; $this->blnIsReadOnly = true; // for more info on each case block, see // comments in the constant definitions // at the top of this file. switch ($intUse) { case DOMDOC_AS_NEW: $this->blnIsReadOnly = false; $this->objDoc = domxml_new_doc("1.0"); $elRoot = $this->objDoc->create_element($Starter); $this->ndRoot = $this->objDoc->append_child($elRoot); break; case DOMDOC_AS_READFILE: $fp = fopen($Starter,"r") OR $this->objErr->throw( "could not open ".$Starter." for reading." ); // attempt thread safety by using flock flock($fp,LOCK_SH); $xmlData = fread($fp,filesize($Starter)); flock($fp,LOCK_UN); fclose($fp); // finish working with the file as // quickly as possible and THEN worry // about making a DOM doc from it. $this->_domOpenFromData($xmlData); break; case DOMDOC_AS_WRITEFILE: $this->blnIsReadOnly = false; $this->fp = fopen($Starter,"bw+") OR $this->objErr->throw( "could not open ".$Starter." for writing." ); flock($this->fp,LOCK_EX); $xmlData = fread($this->fp,filesize($Starter)); $this->_domOpenFromData($xmlData); break; case DOMDOC_AS_REMOTEFILE: $fp = fopen($Starter,"r") OR $this->objErr->throw( "could not open ".$Starter." for reading." ); $xmlData = fread($fp,filesize($Starter)); fclose($fp); $this->_domOpenFromData($xmlData); break; case DOMDOC_AS_REFERENCE: $this->objDoc =& $Starter; break; case DOMDOC_AS_DATA: $this->_domOpenFromData($Starter); break; default: $this->objErr->throw( "second argument to domDoc constructor is invalid" ); } }