如何使用 PHP 函数中的日期和时间查询数据库答案

【问题标题】：How do you query a database using a Date and Time from PHP Function如何使用 PHP 函数中的日期和时间查询数据库
【发布时间】：2018-05-01 07:26:27
【问题描述】：

如何修复我的查询代码，以便它使用日期和时间搜索数据库，但日期是函数中的变量？我是 PHP 和 SQL 的新手，不知道 Dots (.) 和 Quotations 如何完全工作 ("" '')。如何修复这段代码？

WHERE Fixture.date => '$FixtureDate 00:00:00' AND Fixture.date =< '$FixtureDate 23:59:59'

请看下面的代码

function FSearchDate($FixtureDate) {
    try {
        $conn = new PDO("mysql:host=" . $GLOBALS['servername'] . ";dbname=DATABASE_NAME", $GLOBALS['username'], $GLOBALS['password']);
        $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

        $statement = $conn->query("
        SELECT Fixtures.fixtureid AS FixtureID, 
        Fixtures.date AS Date, 
        Fixtures.week AS Week, 
        Fixtures.home_team AS HomeTeam, 
        Fixtures.away_team AS AwayTeam,
        FixtureScores.home_team AS HomeScore, 
        FixtureScores.away_team AS AwayScore
        FROM Fixtures
        INNER JOIN FixtureScores ON Fixtures.fixtureid=FixtureScores.fixtureid 
        WHERE Fixture.date => '$FixtureDate 00:00:00' AND Fixture.date =< '$FixtureDate 23:59:59'"
        );
        $result = $statement->fetch();

        if ($result == null) { // Fixture ID Doesn't Exist
            echo '<script type="text/javascript">alert("The Fixture ID entered is not valid. Please enter a valid Fixture ID");</script>';
        } else {
            $GLOBALS['FixtureID'] = $result[0];
            $GLOBALS['FixtureDate'] = $result[1];
            $GLOBALS['FixtureWeek'] = $result[2];
            $GLOBALS['FixtureHomeTeamName'] = $result[3];
            $GLOBALS['FixtureAwayTeamName'] = $result[4];
            $GLOBALS['FixtureHomeTeamScore'] = $result[5];
            $GLOBALS['FixtureAwayTeamScore'] = $result[6];
        }
    }
    catch(PDOException $e) {
        echo "An problem occured: " . $e->getMessage();
    }

    $conn = null;
}

【问题讨论】：

尝试不使用FSearchDate() 方法的查询，它有效吗？如果是这样，它是一个变量范围。
请查阅有关 PHP 和 MySQL 集成的教程。 “点”用于字符串连接，引号类型（' vs "）很重要，尤其是在您使用它们的上下文中。

标签： php mysql sql date

【解决方案1】：

您的查询错误：

WHERE Fixture.date => '$FixtureDate 00:00:00' AND Fixture.date =< '$FixtureDate 23:59:59'"

您正在尝试使用 => 和 =<，它们没有达到您的预期。

=> 是关联数组的分隔符。

http://www.php.net/manual/en/language.types.array.php

应分别读作>= 和<=，如“大于或等于”和“小于或等于”。

注意：=< 不存在，也不是有效的运算符/分隔符。

大声说出来：“小于或等于”。我们从不说“等于或小于”。

另外，您可能在此处为FSearchDate() 方法设置了一个变量范围，您可能需要将数据库连接传递到该方法。然而，情况可能并非如此。

【讨论】：

【解决方案2】：

你可以在这里使用between

$statement = $conn->query("
    SELECT Fixtures.fixtureid AS FixtureID, 
    Fixtures.date AS Date, 
    Fixtures.week AS Week, 
    Fixtures.home_team AS HomeTeam, 
    Fixtures.away_team AS AwayTeam,
    FixtureScores.home_team AS HomeScore, 
    FixtureScores.away_team AS AwayScore
    FROM Fixtures
    INNER JOIN FixtureScores ON Fixtures.fixtureid=FixtureScores.fixtureid 
    WHERE Fixtures.date BETWEEN 'date('Y-m-d H:i:s',$FixtureDate)' AND 'date('Y-m-d H:i:s',$FixtureDate)'"
    );

检查此声明，

WHERE Fixtures.date BETWEEN 'date('Y-m-d H:i:s',$FixtureDate)' AND 'date('Y-m-d H:i:s',$FixtureDate)'

【讨论】：