Question

我在MySQL中有一个查询（感谢用户Ross Smith II）我在控制台中测试过，（几小时前返回1天10小时34分钟）我相对确定我的PHP是正确的，虽然我可能会忽略某些东西，或者在这个问题的某个地方有一个条件我不能做我想做的事情。非常感谢一些见解。请注意，顶部的时间戳将是从另一个表中选择的变量，但出于此查询的目的，我将时间放在相同的格式中。我已经取出所有变量并尝试了原始数据，仍然可以在SQL查询中工作，但我无法让PHP回应它。我收到致命错误：在非对象上调用成员函数fetch_assoc（）。再次感谢。

$aquery = ("SET @start = \"2013-01-19 07:56:22\";
        SET @end = NOW();

        SELECT
        CONCAT(
            FLOOR(
                (
                    UNIX_TIMESTAMP(@end) - UNIX_TIMESTAMP(@start) - 86400 * (
                        (FLOOR(DATEDIFF(@end, @start) / 7) * 2) +
                            IF(WEEKDAY(@end) > 4, WEEKDAY(@end) - 4, 0) +
                            IF(WEEKDAY(@end) < WEEKDAY(@start), 2, 0)
                    )
                ) / 86400
            ),
            ' days ',
            TIME_FORMAT(
            SEC_TO_TIME(
                (
                    UNIX_TIMESTAMP(@end) - UNIX_TIMESTAMP(@start) - 86400 * (
                        (FLOOR(DATEDIFF(@end, @start) / 7) * 2) +
                            IF(WEEKDAY(@end) > 4, WEEKDAY(@end) - 4, 0) +
                            IF(WEEKDAY(@end) < WEEKDAY(@start), 2, 0)
                    )
                ) % 86400
            ),
            '%H hours %i minutes'
            )
        ) AS duration");
        $aresult = $mysqli->query($aquery);
        // while( $row = $result->fetch_assoc() ) {
        // Edited typo above, does not fix.
        while ( $row = $aresult->fetch_assoc() ) {
        echo ($row['duration']);
        }

Answer 1

$aresult = $mysqli->query($aquery);
while( $row = $result->fetch_assoc() ) {
        echo ($row['duration']);
}

这看起来像一个错字。你不应该使用$aresult->fetch_assoc()吗？

Answer 2

您不能使用多个查询来调用查询。单独查询每个（并删除; s）或使用multi_query。

$aresult = $mysqli->multi_query($aquery);

或

$mysqli->query("SET @start = \"2013-01-19 07:56:22\"");
$mysqli->query("SET @end = NOW()");
$result = $mysqli->query("SELECT
    CONCAT(
        FLOOR(
            (
                UNIX_TIMESTAMP(@end) - UNIX_TIMESTAMP(@start) - 86400 * (
                    (FLOOR(DATEDIFF(@end, @start) / 7) * 2) +
                        IF(WEEKDAY(@end) > 4, WEEKDAY(@end) - 4, 0) +
                        IF(WEEKDAY(@end) < WEEKDAY(@start), 2, 0)
                )
            ) / 86400
        ),
        ' days ',
        TIME_FORMAT(
        SEC_TO_TIME(
            (
                UNIX_TIMESTAMP(@end) - UNIX_TIMESTAMP(@start) - 86400 * (
                    (FLOOR(DATEDIFF(@end, @start) / 7) * 2) +
                        IF(WEEKDAY(@end) > 4, WEEKDAY(@end) - 4, 0) +
                        IF(WEEKDAY(@end) < WEEKDAY(@start), 2, 0)
                )
            ) % 86400
        ),
        '%H hours %i minutes'
        )
    ) AS duration");

Answer 3

您有多个查询，无法像您尝试的那样直接执行。我正在使用PDO，所以如果这可以做你想要的，我不肯定。但试一试。

$mysqli->autocommit(FALSE);
$mysqli->query("SET @start = '2013-01-19 07:56:22'");
$mysqli->query("SET @end = NOW()");
/*$aresult = */$mysqli->query("SELECT
    CONCAT(
        FLOOR(
            (
                UNIX_TIMESTAMP(@end) - UNIX_TIMESTAMP(@start) - 86400 * (
                    (FLOOR(DATEDIFF(@end, @start) / 7) * 2) +
                        IF(WEEKDAY(@end) > 4, WEEKDAY(@end) - 4, 0) +
                        IF(WEEKDAY(@end) < WEEKDAY(@start), 2, 0)
                )
            ) / 86400
        ),
        ' days ',
        TIME_FORMAT(
        SEC_TO_TIME(
            (
                UNIX_TIMESTAMP(@end) - UNIX_TIMESTAMP(@start) - 86400 * (
                    (FLOOR(DATEDIFF(@end, @start) / 7) * 2) +
                        IF(WEEKDAY(@end) > 4, WEEKDAY(@end) - 4, 0) +
                        IF(WEEKDAY(@end) < WEEKDAY(@start), 2, 0)
                )
            ) % 86400
        ),
        '%H hours %i minutes'
        )
    ) AS duration");
$mysqli->commit();

Answer 4

在研究mysqli_multi_query并考虑inhan和ring0's答案之后，感谢Ross Smith II，这是我提出的解决方案。如果有人需要一个PHP脚本来计算从时间戳（这里是$ timeApproved）和当前时间（可以用任何其他时间戳替换，用你的时间戳替换@end = NOW（））的经过时间，这里就是。它将返回0天0小时0分钟格式的时间量。非常感谢你的帮助。

这是更新后的代码

$link = mysqli_connect("localhost", "username", "password", "database");
$query = "SET @start = \"".$timeApproved."\";"; 
$query .= "SET @end = NOW();";
$query .= "SELECT
CONCAT(
    FLOOR(
        (
            UNIX_TIMESTAMP(@end) - UNIX_TIMESTAMP(@start) - 86400 * (
                (FLOOR(DATEDIFF(@end, @start) / 7) * 2) +
                    IF(WEEKDAY(@end) > 4, WEEKDAY(@end) - 4, 0) +
                    IF(WEEKDAY(@end) < WEEKDAY(@start), 2, 0)
            )
        ) / 86400
    ),
    ' days ',
    TIME_FORMAT(
    SEC_TO_TIME(
        (
            UNIX_TIMESTAMP(@end) - UNIX_TIMESTAMP(@start) - 86400 * (
                (FLOOR(DATEDIFF(@end, @start) / 7) * 2) +
                    IF(WEEKDAY(@end) > 4, WEEKDAY(@end) - 4, 0) +
                    IF(WEEKDAY(@end) < WEEKDAY(@start), 2, 0)
            )
        ) % 86400
    ),
    '%H hours %i minutes'
    )
) AS duration;"; 

if (mysqli_multi_query($link, $query)) {
do {

if ($result = mysqli_store_result($link)) {
    while ($row = mysqli_fetch_array($result)) 

{
echo $row['duration'];
}

// mysqli_free_result($result); // I will only have one result.
}   
} while (mysqli_next_result($link));
}

有效的MySQL查询不返回结果

4 个答案: