mssql_field_length

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

mssql_field_lengthGet the length of a field

Опис

int mssql_field_length ( resource $result [, int $offset = -1 ] )

Returns the length of field no. offset in result.

Параметри

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.

Значення, що повертаються

The length of the specified field index on success або FALSE в разі помилки.

Приклади

Приклад #1 mssql_field_length() example

<?php
// Connect to MSSQL and select the database
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 length
echo 'The field \'age\' has a data length of ' mssql_field_length($query1);

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

Наведений вище приклад виведе щось подібне до:

The field 'age' has a data length of 4

Примітки

Зауваження: 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.

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User Contributed Notes 2 notes

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zz(lost dot childz at gmail dot com)
14 years ago
there are same problem with VARBINARY, if you are forced to use existing database with such fields you can do it like this:

SELECT CAST(master.dbo.fn_varbintohexstr(VARBINARYFIELD) AS TEXT) FROM table;
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0
Anonymous
17 years ago
You can also work around this limitation with the following:

   -- for example, with MyVarCharField VARCHAR(1000)
   SELECT CAST(MyVarCharField AS TEXT) FROM MyTable
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