How can one replace mysql_num_fields, mysql_field_len, mysql_field_flags, mysql_field_type, and mysql_field_name functions when using PDO in PHP?

When using PDO in PHP, the functions mysql_num_fields, mysql_field_len, mysql_field_flags, mysql_field_type, and mysql_field_name are not available as they are specific to the old MySQL extension. To replace these functions, you can utilize the PDOStatement object returned by PDO's query method. You can access information about the fields in the result set using methods like getColumnMeta().

// Assume $pdo is your PDO object and $query is your SQL query

$stmt = $pdo->query($query);

// Get the number of fields
$num_fields = $stmt->columnCount();

// Get information about each field
for ($i = 0; $i < $num_fields; $i++) {
    $meta = $stmt->getColumnMeta($i);
    
    $field_name = $meta['name'];
    $field_type = $meta['native_type'];
    $field_len = $meta['len'];
    $field_flags = $meta['flags'];
    
    // Use the field information as needed
}