PDOStatement::getColumnMeta --
Returns metadata for a column in a result set
Описание
mixed PDOStatement::getColumnMeta ( int column )
Внимание
Эта функция является ЭКСПЕРИМЕНТАЛЬНОЙ.
Поведение этой функции, ее имя и относящаяся к ней документация
могут измениться в последующих версиях PHP без уведомления.
Используйте эту функцию на свой страх и риск.
Retrieves the metadata for a 0-indexed column in a result set as an
associative array.
Внимание
Not all PDO drivers support
PDOStatement::getColumnMeta().
Список параметров
column
The 0-indexed column in the result set.
Возвращаемые значения
Returns an associative array containing the following values representing
the metadata for a single column:
Таблица 1. Column metadata
Name
Value
native_type
The PHP native type used to represent the column value.
driver:decl_type
The SQL type used to represent the column value in the database.
If the column in the result set is the result of a function, this value
is not returned by PDOStatement::getColumnMeta().
flags
Any flags set for this column.
name
The name of this column as returned by the database.
len
The length of this column. Normally -1 for
types other than floating point decimals.
precision
The numeric precision of this column. Normally
0 for types other than floating point
decimals.
pdo_type
The type of this column as represented by the
PDO::PARAM_* constants.
Returns FALSE if the requested column does not exist in the result set,
or if no result set exists.
Примеры
Пример 1. Retrieving column metadata
The following example shows the results of retrieving the metadata for a
single column generated by a function (COUNT) in a PDO_SQLITE driver.