ibase_num_fields(resource $result_id): int

获取结果集中的字段数。

参数 

result_id

InterBase 结果标识符。

返回值 

以整数形式返回字段数。

示例 

示例 #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（） - 获取有关字段的信息