Mssql 函数
PHP 手册

mssql_field_length

(PHP 4, PHP 5, PECL odbtp >= 1.1.1)

mssql_field_lengthGet 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, or FALSE on failure.

范例

Example #1 mssql_field_length() example

<?php
// Connect MSSQL
mssql_connect('MANGO\SQLEXPRESS''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 type and length
echo 'The field \'age\' has a data length of ' mssql_field_length($query1);

// Free the query result
mssql_free_result($query);
?>

上例的输出类似于:

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 函数
PHP 手册