Manuale PHP
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# PDOStatement::fetchColumn

(no version information, might be only in CVS)

PDOStatement::fetchColumn -- Returns a single column from the next row of a result set

## Descrizione

string PDOStatement::fetchColumn ( [int column_number] )

Returns a single column from the next row of a result set.

## Elenco dei parametri

column_number

  Number of the column you wish to retrieve from the row. If no value is supplied, PDOStatement::fetchColumn() fetches the first column.

## Valori restituiti

PDOStatement::fetchColumn() returns a single column in the next row of a result set.

Avvertimento
There is no way to return another column from the same row if you use PDOStatement::fetchColumn() to retrieve data.

## Esempi

Esempio 1. Return first column of the next row

`<?php $sth = $dbh->prepare("SELECT name, colour FROM fruit"); $sth->execute(); /* Fetch the first column from the next row in the result set */ print("Fetch the first column from the next row in the result set:\n"); $result = $sth->fetchColumn(); print("$result\n"); $result = $sth->fetchColumn(); print("$result\n"); ?>`

Il precedente esempio visualizzerà:

    Fetch the first column from the next row in the result set:
    lemon
    orange

## Vedere anche:

PDO::query()
PDOStatement::fetch()
PDOStatement::fetchAll()
PDOStatement::prepare()
PDOStatement::setFetchMode()

Indietro | Partenza | Avanti
PDOStatement::fetchAll | Risali | PDOStatement::getAttribute