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MYSQL

Working with PHP and MySQL
By: O'Reilly Media
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    2007-05-24


    Table of Contents:
  • Working with PHP and MySQL
  • Fetching and Displaying
  • Putting It All Together
  • Using PEAR

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    Working with PHP and MySQL - Fetching and Displaying
    ( Page 2 of 4 )

    Use mysql_fetch_row to get the rows from the result set. It takes the result you stored in $result from the query as a parameter. It returns one row at a time from the query until there are no more rows, and then it returns FALSE. Therefore, you do a loop on the result of mysql_fetch_row and define some code to display each row:

      while ($result_row = mysql_fetch_row($result)){
             echo $result_row[2] . '
    <br />';
      }

    Fetch types

    This is not the only way to fetch the results. Using mysql_fetch_array, PHP can place the results into an array in one step. It takes a result as its first parameter, and the way to bind the results as an optional second parameter. If MYSQL_ASSOC is specified, the results are indexed in an array based on their column names in the query. If MYSQL_NUM is specified, then the number starting at zero accesses the results. The default value, MYSQL_BOTH, returns a result array with both types. The mysql_fetch_ assoc is an alternative to supplying the MYSQL_ASSOC argument.

    If you rewrote the code above to use mysql_fetch_array with an associative indexed array, it would look like this:

      while ($row = mysql_fetch_array($result, MYSQL_ASSOC)) {
                                       echo $row[title]. '<br />';
      }

    Closing the Connection

    As a rule of thumb, you always want to close a connection to a database when you're done using it. Closing a database with mysql_close will tell PHP and MySQL that you no longer will be using the connection, and will free any resources and memory allocated to it.

      mysql_close($connection)

       

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