How does php implement the current location function? Solution

How does php implement the current location function? For example: & nbsp; current location & gt; Company Profile & gt; enterprise qualification, google keyword breadcrumb php, things are not difficult, mainly you have to rewrite the URL first, in this way, the request can be serialized into/connected directories ., If it is not very static, how does php implement the current location function?
For example:
Current location> Company Profile> enterprise qualification

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Google keyword breadcrumb php
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It is not difficult to get things. you must first rewrite the URL so that requests can be serialized into/connected directories.
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If it is not good to make it static
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Search for the parent category based on the classification number of the current page.
Use my function find_parent http://topic.csdn.net/u/20110728/15/eadffb68-5eb6-40d8-9ec1-2bc439f45322.html