Manual do PHP
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# PDOStatement::bindColumn

(no version information, might be only in CVS)

PDOStatement::bindColumn -- Bind a column to a PHP variable

## Descrição

bool PDOStatement::bindColumn ( mixed column, mixed &param [, int type [, int maxlen [, mixed driver_options]]] )

Atenção
Esta função é EXPERIMENTAL. Isso quer dizer que o comportamento desta função e seu nome, incluindo TUDO o que está documentado aqui pode mudar em futuras versões do PHP, SEM QUALQUER NOTIFICAÇÃO. Esteja avisado, e use esta função por sua própria conta e risco.

On each row fetch param will contain the value of the corresponding column. column is the 1-based offset of the column, or the column name. For maximum portability, do not call this function before calling PDOStatement::execute().

## Lista de parâmetros

column

  Number of the column (1-indexed) in the result set.

param

  Name of the PHP variable to which the column will be bound.

type

  Data type of the parameter, specified by the PDO_PARAM_* constants.

maxlen

  Maximum length of the parameter.

driver_options

## Exemplos

Exemplo 1. Binding result set output to PHP variables Binding columns in the result set to PHP variables is an effective way to make the data contained in each row immediately available to your application. The following example demonstrates how PDO allows you to bind and retrieve columns with a variety of options and with intelligent defaults.
`<?php function readData($dbh) { $sql = 'SELECT name, colour, calories FROM fruit'; try { $stmt = $dbh->prepare($sql); $stmt->execute(); /* Bind by column number with an explicit data type & length */ $stmt->bindColumn(1, $name, PDO_PARAM_STR, 64); /* Bind by column number with default data type & length */ $stmt->bindColumn(2, $colour); /* Bind by column name with default data type & length */ $stmt->bindColumn('CALORIES', $cals); while ($row = $stmt->fetch(PDO_FETCH_BOUND)) { $data = $name . "\t" . $colour . "\t" . $cals . "\n"; print $data; } } catch (PDOException $e) { print $e->getMessage(); } } readData($dbh); ?>`
O exemplo acima irá imprimir:
    apple   red     150
    banana  yellow  175
    kiwi    green   75
    orange  orange  150
    mango   red     200
    strawberry      red     25

## Veja também

PDOStatement::execute()
PDOStatement::fetch()
PDOStatement::fetchAll()
PDOStatement::fetchSingle()

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