PDOStatement
PHP Manual

PDOStatement::fetchColumn

(PHP 5 >= 5.1.0, PECL pdo >= 0.9.0)

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

Descrizione

string PDOStatement::fetchColumn ([ int $column_number = 0 ] )

Returns a single column from the next row of a result set or FALSE if there are no more rows.

Elenco dei parametri

column_number

0-indexed 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.

Avviso

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

Esempi

Example #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(
"name = $result\n");

print(
"Fetch the second column from the next row in the result set:\n");
$result $sth->fetchColumn(1);
print(
"colour = $result\n");
?>

Il precedente esempio visualizzerĂ :

Fetch the first column from the next row in the result set:
name = lemon
Fetch the second column from the next row in the result set:
colour = red

Vedere anche:


PDOStatement
PHP Manual