(PHP 5 >= 5.1.0, PHP 7, PECL pdo >= 0.9.0)
Returns a single column from the next row of a result set
public mixed 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.
Note:
PDOStatement::fetchColumn() should not be used to retrieve boolean columns, as it is impossible to distinguish a value of
FALSE
from there being no more rows to retrieve. Use PDOStatement::fetch() instead.
Parameters:
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.
Returns:
PDOStatement::fetchColumn() returns a single column in the next row of a result set.
Warning
There is no way to return another column from the same row if you use PDOStatement::fetchColumn() to retrieve data.
Examples:
Return first column of the next row
<?php $sth = $dbh->prepare("SELECT name, colour FROM fruit"); $sth->execute(); print("Fetch the first column from the first row in the result set:\n"); $result = $sth->fetchColumn(); print("name = $result\n"); print("Fetch the second column from the second row in the result set:\n"); $result = $sth->fetchColumn(1); print("colour = $result\n"); ?>
The above example will output:
Fetch the first column from the first row in the result set: name = lemon Fetch the second column from the second row in the result set: colour = red
See also:
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