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Small examples of php database connection, query, and display results

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2016-07-25 08:55:551197browse
  1. /**
  2. * PHP operates database (connection, query, display results)
  3. * edit: bbs.it-home.org
  4. */
  5. define ('HOSTNAME', 'localhost'); //Database host name
  6. define ('USERNAME', 'username'); //Database Username
  7. define ('PASSWORD', 'password'); //Database user login password
  8. define ('DATABASE_NAME', 'testdb'); //Database to be queried
  9. $db = mysql_connect(HOSTNAME, USERNAME, PASSWORD) or
  10. die (mysql_error());
  11. //If the connection cannot be made, the reason for the mysql error will be displayed.
  12. mysql_select_db(DATABASE_NAME);
  13. //Switch to testdb
  14. $query =
  15. "SELECT uri,title FROM testdb WHERE 1 ORDER by rand() LIMIT 1";
  16. //The above sentence means to randomly extract an item from testdb data.
  17. $result = mysql_query($query);
  18. //Query
  19. while ($row = mysql_fetch_array($result)) { echo "

    " ,

  20. ($row['title'] ), "

    –" , nl2br($row['uri'])

  21. , "

    "; }
  22. //Display results
  23. mysql_free_result ($result);
  24. //Release the result
  25. mysql_close();
  26. //Close the connection
  27. ?>
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