mssql_field_length

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

mssql_field_lengthGet the length of a field

Ostrzeżenie

Ta funkcja została USUNIĘTA w PHP 7.0.0.

Alernatywy dla tej funkcji obejmują:

Opis

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

Returns the length of field no. offset in result.

Parametry

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.

Zwracane wartości

The length of the specified field index on success lub FALSE w przypadku niepowodzenia.

Przykłady

Przykład #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);
?>

Powyższy przykład wyświetli coś podobnego do:

The field 'age' has a data length of 4

Notatki

Informacja: 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.

Zobacz też:

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User Contributed Notes 2 notes

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0
zz(lost dot childz at gmail dot com)
12 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
15 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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