Calculate the distance between U.S. zip codes and find all zip codes within a given distance of a known zip code.
This project was started as a port to PHP 5 of a zip code class I wrote in 2005 for PHP 4. It also provides improvements based on suggestions from users of the original code.
This fork has been modified to be compatible with PHP 5.3+ as well as the GeoNames.org postal code database.
The PostalCode class is based on a MySQL table or view with the following fields:
country_code char(2)
postal_code varchar(20)
place_name varchar(180)
admin_name1 varchar(100)
admin_code1 varchar(20)
admin_name2 varchar(100)
admin_code2 varchar(20)
admin_name3 varchar(100)
admin_code3 varchar(20)
latitude float
longitude float
accuracy tinyint(1)
While the name of this table can be specified by the mysql_table class property,
the default table name is postal_codes.
Data Source
The class has been modified to work with the GeoNames.org postal code database, which is licensed under a Creative Commons Attribution 3.0 License. This database can be downloaded and imported into a MySQL database using the included schema.
Composer is an easy way to manage dependencies in your PHP projects. The PHP PostalCode Class can be found in the default Packagist repository.
After installing Composer into your project, the PHP PostalCode Class can be installed by adding the following lines to your composer.json file and running the Composer command line tool:
{
"require": {
"rubberneck/php-postal-code": "2.*"
}
}