What are the common pitfalls when using the mysql_fetch_array function in PHP and how can they be avoided?

Common pitfalls when using mysql_fetch_array function in PHP include not checking for the end of the result set, mixing up column names and array indices, and not handling NULL values properly. To avoid these issues, always check if the result set is empty before fetching data, use column names instead of array indices to access data, and handle NULL values appropriately. 

$result = mysql_query($query);
if(mysql_num_rows($result) > 0) {
    while($row = mysql_fetch_array($result)) {
        // Use column names to access data
        $column1 = $row['column1'];
        $column2 = $row['column2'];
        
        // Handle NULL values
        $column3 = isset($row['column3']) ? $row['column3'] : 'N/A';
        
        // Process data here
    }
} else {
    echo "No results found.";
}

Keywords

mysql_fetch_array PHP pitfalls avoid errors

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