What is the difference between mysql_fetch_object and mysql_fetch_array in PHP?

The main difference between mysql_fetch_object and mysql_fetch_array in PHP is the way they return data from a MySQL result set. mysql_fetch_object returns each row as an object with property names that correspond to the column names, while mysql_fetch_array returns each row as an array with both numeric and associative keys. If you want to access data using object properties, use mysql_fetch_object. If you prefer accessing data using array keys, use mysql_fetch_array.

// Using mysql_fetch_object
$result = mysql_query("SELECT * FROM table");
while ($row = mysql_fetch_object($result)) {
    echo $row->column_name;
}

// Using mysql_fetch_array
$result = mysql_query("SELECT * FROM table");
while ($row = mysql_fetch_array($result)) {
    echo $row['column_name'];
}