mssql_field_length
(PHP 4, PHP 5, PECL odbtp >= 1.1.1)
mssql_field_length — Get the length of a field
说明
int mssql_field_length ( resource $result [, int $offset = -1 ] )Returns the length of field no. offset in result.
参数
- result
-
The result resource that is being evaluated. This result comes from a call to mssql_query().
- offset
-
The field offset, starts at 0. If omitted, the current field is used.
返回值
The length of the specified field index on success 或者在失败时返回 FALSE.
范例
Example #1 mssql_field_length() example 以上例程的输出类似于：
<?php
// Connect to MSSQL and select the database
mssql_connect('MANGOSQLEXPRESS', 'sa', 'phpfi');
mssql_select_db('php');
// Send a select query to MSSQL
$query = mssql_query('SELECT [name], [age] FROM [php].[dbo].[persons]');
// Print the field length
echo 'The field 'age' has a data length of ' . mssql_field_length($query, 1);
// Free the query result
mssql_free_result($query);
?>
The field 'age' has a data length of 4
注释
Note: Note to Windows Users
Due to a limitation in the underlying API used by PHP (MS DBLib C API), the length of VARCHAR fields is limited to 255. If you need to store more data, use a TEXT field instead.
参见
- mssql_field_name() - Get the name of a field
- mssql_field_type() - Gets the type of a field
