(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
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.
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.
PDOStatement::fetchColumn() returns a single column from the next row of a result set or false if there are no more rows.
There is no way to return another column from the same row if you use PDOStatement::fetchColumn() to retrieve data.
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
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https://www.php.net/manual/en/pdostatement.fetchcolumn.php