In what ways can the inclusion of unnecessary conditions or redundant code in PHP scripts contribute to issues like "Query was empty"?

Including unnecessary conditions or redundant code in PHP scripts can lead to issues like "Query was empty" because it can interfere with the execution of the actual query. This can happen if the unnecessary conditions prevent the query from being properly constructed or if the redundant code overrides the query statement. To solve this issue, review the PHP script to remove any unnecessary conditions or redundant code that may be interfering with the query execution.

// Example of fixing unnecessary conditions causing "Query was empty" issue
$query = "SELECT * FROM users WHERE";

// Unnecessary condition causing issue
// if ($condition) {
//     $query .= " condition = 'value'";
// }

$query .= " id = 1";

// Execute the query
$result = mysqli_query($connection, $query);

// Process the query result
if ($result) {
    // Query was successful
} else {
    // Query failed
}