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.
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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"); ?>
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Il precedente esempio visualizzerĂ : Fetch the first column from the next row in the result set:
lemon
orange |
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Vedere anche:
PDO::query() |
PDOStatement::fetch() |
PDOStatement::fetchAll() |
PDOStatement::prepare() |
PDOStatement::setFetchMode() |