# ibase_num_fields

(PHP 5, PHP 7)

ibase_num_fields — Get the number of fields in a result set

### 说明

ibase_num_fields ( resource `$result_id` ) : int

Get the number of fields in a result set.

### 参数

`result_id`

  An InterBase result identifier.

### 返回值

Returns the number of fields as an integer.

### 范例

Example #1 ibase_num_fields() example

    <?php
    $rs = ibase_query("SELECT * FROM tablename");
    $coln = ibase_num_fields($rs);
    for ($i = 0; $i < $coln; $i++) {
        $col_info = ibase_field_info($rs, $i);
        echo "name: " . $col_info['name'] . "\n";
        echo "alias: " . $col_info['alias'] . "\n";
        echo "relation: " . $col_info['relation'] . "\n";
        echo "length: " . $col_info['length'] . "\n";
        echo "type: " . $col_info['type'] . "\n";
    }
    ?>

### 参见

- ibase_field_info() - Get information about a field