#bool pq\Result::fetchCol(mixed &$ref[, mixed $col = 0])

Iteratively fetch a single column.

Params:#

• mixed $ref#
  The variable where the column value will be stored in.
• Optional mixed $col# = 0
  The column name or index.

Returns:#

• bool, success.
• NULL, when iteration ends.

Throws:#

• pq\Exception\InvalidArgumentException
• pq\Exception\BadMethodCallException
• pq\Exception\RuntimeException

Example:#

<?php

try {
    $connection = new pq\Connection;
    
    $result = $connection->exec("SELECT email FROM accounts WHERE email LIKE '_@%'");
    
    while ($result->fetchCol($email))  {
        echo "Mail: {$email}\n";
    }
} catch (\pq\Exception $e) {
    echo $e->getMessage(), "\n";
}

?>