Multiple Field Search With PHP and mySQL. ... You might then generate links to the full post by passing the ID result on to the URL using the $_POST function in PHP.

Might want to check your /etc/php.ini and make sure you have the "extension=mysql.so" uncommented (restart Apache if you make a change). Also might want to check over the [MySQL] section.

The MySQL SUM function takes the fields or rows you input and adds their values together, then returns the total. Save your query in a PHP variable.