What are common reasons why a PHP script may not be reading all data from a database?

One common reason why a PHP script may not be reading all data from a database is due to an error in the SQL query that limits the results returned. To solve this issue, you should check your SQL query to ensure that it is correctly fetching all the necessary data without any limitations.

// Incorrect SQL query limiting results
$query = "SELECT * FROM table_name LIMIT 10";

// Correct SQL query fetching all data
$query = "SELECT * FROM table_name";