# Blocking 2 users from overriding the XML **URL:** \ **Category:** Uncategorized\ **Created:** [June 27, 2007, 5:28am UTC](https://forum.kirupa.com/t/blocking-2-users-from-overriding-the-xml/230552 "2007-06-27T05:28:13Z")\ **Posts on this page:** 1\ **Page:** 1

**Author:** ![mabulencia](https://avatars.discourse-cdn.com/v4/letter/m/f04885/32.png) [@mabulencia](https://forum.kirupa.com/u/mabulencia)\ **Post date:** [June 27, 2007, 5:28am UTC](https://forum.kirupa.com/t/blocking-2-users-from-overriding-the-xml/230552/1 "2007-06-27T05:28:13Z")

HELP!!! How can I ensure that no 2 users in different browsers booking the same plot dont override each other? Much appreciated. [COLOR=darkred]index.php[/COLOR] [COLOR=darkred]\[/COLOR] [COLOR=darkred]\[/COLOR] [COLOR=darkred]\\Plot booking\[/COLOR] [COLOR=darkred]\[/COLOR] [COLOR=darkred]\[/COLOR] [COLOR=darkred]\[/COLOR] [COLOR=darkred]\[/COLOR] [COLOR=darkred]\[/COLOR] [COLOR=darkred]\[/COLOR] [COLOR=darkred]\

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[/COLOR] [COLOR=darkred]\’;[/COLOR] [COLOR=darkred]function start\_tag1($parser1, $name1, $attrs1){[/COLOR] [COLOR=darkred]global $table\_string1;[/COLOR] [COLOR=darkred]$assign1=$attrs1[assigned];[/COLOR] [COLOR=darkred]if ($assign1==“no”){[/COLOR] [COLOR=darkred]$table\_string1 .= “\[/COLOR] [COLOR=darkred]\[/COLOR] [COLOR=darkred]\[/COLOR] [COLOR=darkred]\[/COLOR] [COLOR=darkred]\Plots not available:\’;[/COLOR] [COLOR=darkred]function start\_tag($parser, $name, $attrs){[/COLOR] [COLOR=darkred]global $table\_string;[/COLOR] [COLOR=darkred]$assign=$attrs[assigned];[/COLOR] [COLOR=darkred]if ($assign==“yes”){[/COLOR] [COLOR=darkred]$table\_string .= “\\$attrs[room]\\$attrs[student]\\”;[/COLOR] [COLOR=darkred]}[/COLOR] [COLOR=darkred]}[/COLOR] [COLOR=darkred]function end\_tag($parser, $name){}[/COLOR] [COLOR=darkred]$parser = xml\_parser\_create();[/COLOR] [COLOR=darkred]xml\_parser\_set\_option($parser, XML\_OPTION\_CASE\_FOLDING, 0);[/COLOR] [COLOR=darkred]xml\_set\_element\_handler($parser, “start\_tag”, “end\_tag”);[/COLOR] [COLOR=darkred]$table\_string = “\[/COLOR] [COLOR=darkred]\\Plot no.\\Student\\”;[/COLOR] [COLOR=darkred]xml\_parse($parser, file\_get\_contents(“bookings.xml”)) or die(“Error parsing XML file”);[/COLOR] [COLOR=darkred]$table\_string .= “\”;[/COLOR] [COLOR=darkred]echo $table\_string;[/COLOR] [COLOR=darkred]echo ‘\[/COLOR] [COLOR=darkred]\[/COLOR] [COLOR=darkred]\[/COLOR] [COLOR=darkred]\’;[/COLOR] [COLOR=darkred]?\>[/COLOR] [COLOR=darkred]\[/COLOR] [COLOR=darkslateblue]processForm.php[/COLOR] [COLOR=darkslateblue]\[/COLOR] [COLOR=darkslateblue]\[/COLOR] [COLOR=darkslateblue]\[/COLOR] [COLOR=darkslateblue]\Plot booking processed\[/COLOR] [COLOR=darkslateblue]\[/COLOR] [COLOR=darkslateblue]\[/COLOR] [COLOR=darkslateblue]\