PHP 手冊
前一頁 |  | 下一頁

# PDOStatement::bindColumn

(no version information, might be only in CVS)

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

## Description

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

警告
這個函數是實驗性質的。這個函數的行為、名稱、和關於此函數的任何其他文件在未來PHP的發行中可能會在不通知的情況下改變。 使用此延伸需自行承擔風險。

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().

## Parameters

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

## 範例

範例 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);
?>`

The above example will output:

    apple   red     150
    banana  yellow  175
    kiwi    green   75
    orange  orange  150
    mango   red     200
    strawberry      red     25

## 參考

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

前一頁 | 內容 | 下一頁
PDO::setAttribute | 上一層 | PDOStatement::bindParam