cubrid_field_len(resource $result, int $field_offset): int

此函数在成功时返回指定字段的最大长度，或在失败时返回 FALSE。

参数 

result

result来自对 cubrid_execute（） 的调用

field_offset

数值字段偏移量。从 0 开始。如果不存在，则还会发出 E_WARNING 级错误。field_offsetfield_offset

返回值 

最大长度，当过程成功时。

失败时为 false。

示例 

示例 #1 cubrid_field_len（） example

<?php
$conn = cubrid_connect("localhost", 33000, "demodb");
$result = cubrid_execute($conn, "SELECT * FROM game WHERE host_year=2004 AND nation_code='AUS' AND medal='G'");

$column_names = cubrid_column_names($result);
$column_types = cubrid_column_types($result);

printf("%-30s %-30s %-15s\n", "Column Names", "Column Types", "Column Maxlen");
for($i = 0, $size = count($column_names); $i < $size; $i++) {
    $column_len = cubrid_field_len($result, $i);
    printf("%-30s %-30s %-15s\n", $column_names[$i], $column_types[$i], $column_len); 
}

cubrid_disconnect($conn);
?>

以上示例会输出：

Column Names                   Column Types                   Column Maxlen  
host_year                      integer                        11             
event_code                     integer                        11             
athlete_code                   integer                        11             
stadium_code                   integer                        11             
nation_code                    char                           3              
medal                          char                           1              
game_date                      date                           10