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4.

Load

http://seophp.example.com/Products/C5/P99.html

, and expect to get the same

output as with the previous request, as shown in Figure 3-10.

Figure 3-10

In this example you started by modifying

product.php

to accept product URLs that accept a product

ID and a category ID. Then you added URL rewriting support for URLs with two numeric parameters.

You created a rewriting rule to your

.htaccess

file, which handles URLs with two parameters:

RewriteRule ^Products/C([0-9]*)/P([0-9]*)\.html$

i

/product.php?category_id=$1&product_id=$2 [L]

The rule looks a bit more complicated, but if you look carefully, you’ll see that it’s not so different from

the rule handling URLs with a single parameter. The rewriting rule has now two parameters —

$1

is the

number that comes after

Products/C

, and is defined by

([0-9]*

), and the second parameter,

$2

, is

the number that comes after

/P

.

Figure 3-11 is a visual representation of how this rewrite rule matches the incoming link.

The result is that you now delegate any URL that looks like

Products/C

m

/P

n

.html

to

product.php?category_id=

m

&product_id=

n

.

Figure 3-11

Client requests URL

http://seophp.example.com/Products/C5/P99.html

^Products/C([0–9]*)/P([0–9]*)\.html$

/product.php?category_id=$1&product_id=$2

PHP script executes

/product.php?category_id=5&product_id=99

mod_rewrite

translates request

63

Chapter 3: Provocative SE-Friendly URLs

c03.qxd:c03 10:39 63

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