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    <p>Add a field called "type" that ranks your dropoff and pickup types where lower numbers represent better (more precise) options:</p> <ol> <li>city/city</li> <li>city/country</li> <li>country/city</li> <li>country/country</li> <li>city/region</li> <li>region/city</li> <li>country/region</li> <li>region/country</li> <li>region/region</li> </ol> <p>Since you're storing tables of cities, countries, states, and regions, you can use their ids in your rules table. Modify your rules table to have a schema similar to the following</p> <ul> <li>name</li> <li>type (from above)</li> <li>pickup_type</li> <li>pickup_city_id</li> <li>pickup_state_id</li> <li>pickup_country_id</li> <li>pickup_region_id</li> <li>drop_type</li> <li>drop_city_id</li> <li>drop_state_id</li> <li>drop_country_id</li> <li>drop_region_id</li> </ul> <p>Now, if you know your pickup and destination cities, you should be able to load their state, country, and region ids from your other tables. Then, you can perform the following query:</p> <pre><code> SELECT * FROM rules WHERE ((pickup_type = 'city' &amp;&amp; pickup_city_id = '$pickup_city_id') OR (pickup_type = 'state' &amp;&amp; pickup_state_id = '$pickup_state_id') OR (pickup_type = 'country' &amp;&amp; pickup_country_id = '$pickup_country_id') OR (pickup_type = 'region' &amp;&amp; pickup_region_id = '$pickup_region_id')) AND ((drop_type = 'city' &amp;&amp; drop_city_id = '$drop_city_id') OR (drop_type = 'state' &amp;&amp; drop_state_id = '$drop_state_id') OR (drop_type = 'country' &amp;&amp; drop_country_id = '$drop_country_id') OR (drop_type = 'region' &amp;&amp; drop_region_id = '$drop_region_id')) ORDER BY type ASC </code></pre> <p>That query will look for rules that match your dropoff city, state, country, or region and your pickup city, state, country, or region. Because you're sorting by type, the first result in the set should be the most convenient courier.</p>
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    1. POTrying to assign something to a "rule" using logic in PHP and MySQL
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    1. POTrying to assign something to a "rule" using logic in PHP and MySQL
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    1. COI'm not sure I totally understand. What would go in the variables $pickup and $dropoff? If it's the City, then there would still need multiple queries if that City isn't listed in any rules. Could you explain further? Thanks for the input!
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    2. COOkay, so you'll have to add that to the query. I'm posting an edit that takes that into consideration.
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    3. COThat looks good. I'll try it out. Thanks! The one problem I may run into is that certain countries might be in multiple regions... and I'll need to figure out which is the most relevant region for the delivery. But I should be able to figure that out.
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