What are common pitfalls when using mysql_fetch_assoc in PHP and how can they be avoided?

One common pitfall when using mysql_fetch_assoc in PHP is forgetting to check if the result set is empty before trying to fetch rows. This can lead to errors when trying to access non-existent rows. To avoid this, always check if there are rows to fetch before attempting to fetch them. 

// Check if there are rows to fetch before fetching them
$result = mysql_query("SELECT * FROM table");
if (mysql_num_rows($result) > 0) {
    while ($row = mysql_fetch_assoc($result)) {
        // Process the fetched row
    }
} else {
    echo "No rows found";
}

Keywords

mysql_fetch_assoc PHP database errors avoid

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