In PHP, what are some potential reasons why certain data may not be displayed correctly even though it exists in the database?

One potential reason why certain data may not be displayed correctly even though it exists in the database is due to improper encoding. Make sure that the data retrieved from the database is properly encoded before displaying it on the webpage. You can use functions like `utf8_encode()` or `htmlspecialchars()` to ensure proper encoding. 

// Retrieve data from the database
$data = $row['column_name'];

// Properly encode the data before displaying
echo utf8_encode($data);
// Or
echo htmlspecialchars($data);

Keywords

SQL injection data encoding database connection PHP error reporting data retrieval.

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