How to Fix the 'Resource id #' Error When Echoing MySQL Query Results in PHP?

Echoing MySQL Query Results in PHP: Overcoming "Resource id #" Error

When working with MySQL databases in PHP, you may encounter the "Resource id #" error while attempting to echo the result of a query. This error message indicates that you're trying to directly echo a MySQL resource handle instead of the actual query result.

To resolve this issue and retrieve the intended result, you need to employ a fetch function. The following approach illustrates how to use the mysql_fetch_assoc() function to fetch and print the query result:

$result = mysql_query(sprintf("SELECT TIMEDIFF(NOW(), '%s') as time_delta", $row['fecha']));
if ($result) {
  $data = mysql_fetch_assoc($result);
  echo $data['time_delta'];
}

In this code:

• The first line executes the query and receives a resource handle as a result.
• The second line checks if the query was successful.
• The mysql_fetch_assoc() function (third line) fetches the next row from the result resource as an associative array ($data).
• The desired result can then be accessed using the array key ('time_delta' in this case).

Caution:

While the mysql functions are still available, their use in new projects is strongly discouraged. Consider utilizing the PDO extension with the PDO_mysql PDO driver or the mysqli extension for improved security and maintainability.

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