February 12, 2011 
Definition:
function iis7_rewrite_rule_exists($filename) {}
Check if rewrite rule for WordPress already exists in the IIS 7 configuration file
Parameters
- string $filename: The file path to the configuration file
Source code
function iis7_rewrite_rule_exists($filename) {
if ( ! file_exists($filename) )
return false;
if ( ! class_exists('DOMDocument') )
return false;
$doc = new DOMDocument();
if ( $doc->load($filename) === false )
return false;
$xpath = new DOMXPath($doc);
$rules = $xpath->query('/configuration/system.webServer/rewrite/rules/rule[starts-with(@name,\'wordpress\')]');
if ( $rules->length == 0 )
return false;
else
return true;
}
1969
A HitchHackers guide through WordPress 
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