Mod_rewrite and PHP functions

This is a very easy tuturial about creating search engine friendly url's with the help of mod_rewrite and some PHP functions. Rewrite Function This function parses an input into the $_GET, $_REQUEST, and $HTTP_GET_VARS Globals. If your script relies on register_globals being enabled call extract( $_GET, EXTR_OVERWRITE ); after using this function to register again <br>the $_GET array pair values in to the global namespace The input: $request = the string variable you >need parsed into the global namespace $array_delim = the array pair value deliminator $pair_delim = the deliminator that seperates pair names from pairs values returns: void or no return value; Example Usage: ------------------------------------------------------------------------------- In the .htaccess you have: RewriteEngine On RewriteBase / RewriteRule ^somepage/(.*)\.html somepage.php?rewrite=$1 [L] Your links: Your original link url was:http://yoursite.com/somepage.php?id=20&amp;name=funny

You change your url to: http://yoursite.com/somepage/id-20/name-funny.html In the script somepage.php you put this at the top:

if( $_GET['rewrite'])
{
$request = $_GET['rewrite'];
mod_rewrite( $request, '/', '-' );

# if you have register_globals enables uncomment the following
# extract( $_GET, EXTR_OVERWRITE );
}

What happenes when a user clicks the link: User sends request for "somepage/id-20/name-funny.html" ModRewrite Engine is on and request matches pattern matches "somepage/" ModRewrite engine changes the request to somepage.php?rewrite=id-20/name-funny The PHP engine is called and the script is run the $_GET['rewrite'] is processed by the mod_rewrite function the mod_rewrite function changes this value "id-20/name-funny" into

$_GET['id'] = '20';
$_GET['name'] = 'funny';

...then if you depend on register_globals being on ( read converting an old script ) you call this:

extract( $_GET, EXTR_OVERWRITE );

right after the mod_rewrite function to put all the new $_GET variables into the global name space There you have it! a dynamic mod_rewrite tutorial made easy!

*/

function mod_rewrite( $request, $array_delim, $pair_delim )
{
global $_GET, $HTTP_GET_VARS, $_REQUEST;
$value_pairs = explode( $array_delim, $request );
$make_global = array();

foreach( $value_pairs as $pair )
{
$pair = explode( $pair_delim, $pair );
$_GET[$pair[0]] = $pair[1];
$_REQUEST[$pair[0]] = $pair[1];
$HTTP_GET_VARS[$pair[0]] = $pair[1];
}
}

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