How can the error message "supplied argument is not a valid MySQL result resource" be resolved in PHP?

The error message "supplied argument is not a valid MySQL result resource" typically occurs when trying to use a MySQL result resource that is not valid, such as when an SQL query fails to execute properly. To resolve this issue, you should check for errors in your SQL query and connection to the database, ensuring that the query is executed successfully and returns a valid result resource. 

// Example PHP code snippet to resolve "supplied argument is not a valid MySQL result resource" error

// Establish a connection to the MySQL database
$connection = mysqli_connect("localhost", "username", "password", "database");

// Check if the connection is successful
if (!$connection) {
    die("Connection failed: " . mysqli_connect_error());
}

// Execute a SQL query
$query = "SELECT * FROM table";
$result = mysqli_query($connection, $query);

// Check if the query was executed successfully
if (!$result) {
    die("Error in SQL query: " . mysqli_error($connection));
}

// Process the query result
while ($row = mysqli_fetch_assoc($result)) {
    // Do something with the data
}

// Close the connection
mysqli_close($connection);

Keywords

PHP MySQL error message result resource resolution

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