Illegal String Offset within PDO For Each loop

问题

PHP Query:

<?php

    $query = $db->prepare('SELECT * FROM Locations WHERE user_id = :id LIMIT 0, 5');
    $query->bindParam(":id",$id);
    $result = $query->execute();

    $rows = $query->fetch();

    foreach ($rows as $row) {
        echo $row["timestamp"]; "<br />";
    }

?>

The two rows that should be printed (timestamp):

What actually prints: 1188((22

The error within the console: PHP Warning: Illegal string offset 'timestamp' in /Sites/pages/user_account.php on line 73 - Line 73 being the echo $row... inside the forloop.

Any help would be greatly appreciated.

回答1:

You are using fetch, which retrieves a single row, instead of fetchAll:

$rows = $query->fetchAll();

回答2:

You have two rows (user_id = 8)

$rows = $query->fetchAll();

For all rows

foreach ($rows as $row) {
  echo $row . "<br />";
}

For 1 row , all column

while ($row = $rows) {

  foreach ($row as $column) {
    echo $column . "<br />";
  }

}

来源：https://stackoverflow.com/questions/15212008/illegal-string-offset-within-pdo-for-each-loop