In what scenarios should developers consider removing specific lines of code, such as the mysql_fetch_array function, to resolve issues with missing data in PHP scripts?

When developers encounter issues with missing data in PHP scripts, they should consider removing specific lines of code that might be causing the problem. For example, the mysql_fetch_array function is deprecated in newer versions of PHP and can lead to missing data if not handled correctly. To resolve this issue, developers should replace mysql_fetch_array with mysqli_fetch_array or PDO fetch functions for database queries.

// Original code using mysql_fetch_array
$result = mysql_query("SELECT * FROM users");
while ($row = mysql_fetch_array($result)) {
    // Process data
}

// Updated code using mysqli_fetch_array
$result = mysqli_query($conn, "SELECT * FROM users");
while ($row = mysqli_fetch_array($result)) {
    // Process data
}