Php/docs/pdostatement.fetchcolumn
PDOStatement::fetchColumn
(PHP 5 >= 5.1.0, PHP 7, PECL pdo >= 0.9.0)
PDOStatement::fetchColumn — Returns a single column from the next row of a result set
Description
public PDOStatement::fetchColumn
([ int $column_number = 0
] ) : mixed
Returns a single column from the next row of a result set or FALSE if
there are no more rows.
Note:
PDOStatement::fetchColumn() should not be used to retrieve boolean columns, as it is impossible to distinguish a value of
FALSEfrom there being no more rows to retrieve. Use PDOStatement::fetch() instead.
Parameters
column_number- 0-indexed number of the column you wish to retrieve from the row. If no value is supplied, PDOStatement::fetchColumn() fetches the first column.
Return Values
PDOStatement::fetchColumn() returns a single column
from the next row of a result set or FALSE if there are no more rows.
Warning There is no way to return another column from the same row if you use PDOStatement::fetchColumn() to retrieve data.
Examples
Example #1 Return first column of the next row
<?php$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
- PDO::query() - Executes an SQL statement, returning a result set as a PDOStatement object
- PDOStatement::fetch() - Fetches the next row from a result set
- PDOStatement::fetchAll() - Returns an array containing all of the result set rows
- PDO::prepare() - Prepares a statement for execution and returns a statement object
- PDOStatement::setFetchMode() - Set the default fetch mode for this statement
