小编Bob*_*Bob的帖子

我有以下内容:

$counter = 1;   
while($row= mysql_fetch_assoc($result)) {
    $counter2 = $counter++;

    echo($counter2 . $row['foo']);
}

有没有更简单的方法来获得1,2,3等每个结果或这是最好的方法？

谢谢

如果未设置变量,是否会使mysql忽略条件,例如

SELECT *
FROM foo
WHERE id = $id
AND bar = $baz

如果设置$ baz运行查询正常,否则运行查询减去AND子句？

谢谢

说我有以下数组:

Array
(
[0] => Array
    (
        [category_id] => 1
        [name] => foo
        [parent_id] => 0
    )

[1] => Array
    (
        [category_id] => 2
        [name] => bar
        [parent_id] => 1
    )

[2] => Array
    (
        [category_id] => 3
        [name] => baz
        [parent_id] => 0
    )

[3] => Array
    (
        [category_id] => 4
        [name] => test
        [parent_id] => 2
    )
[4] => Array
    (
        [category_id] => 5
        [name] => test2
        [parent_id] => 4
    )

)

我正在尝试获得以下输出:

foo
foo > bar
baz …