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php实现日历周末变红

2026-02-28 02:32:33PHP

使用PHP实现日历周末日期变红

在PHP中实现日历周末日期变红的功能，可以通过判断日期是否为周六或周日，然后为该日期添加特定的CSS样式。以下是一个完整的实现方法：

创建日历函数

function generateCalendar($year, $month) {
    $firstDay = mktime(0, 0, 0, $month, 1, $year);
    $daysInMonth = date('t', $firstDay);
    $dayOfWeek = date('w', $firstDay);

    echo '<table border="1">';
    echo '<tr><th>Sun</th><th>Mon</th><th>Tue</th><th>Wed</th><th>Thu</th><th>Fri</th><th>Sat</th></tr>';

    echo '<tr>';
    for ($i = 0; $i < $dayOfWeek; $i++) {
        echo '<td></td>';
    }

    for ($day = 1; $day <= $daysInMonth; $day++) {
        $currentDay = mktime(0, 0, 0, $month, $day, $year);
        $dayOfWeek = date('w', $currentDay);

        $style = '';
        if ($dayOfWeek == 0 || $dayOfWeek == 6) {
            $style = 'style="color: red;"';
        }

        echo "<td $style>$day</td>";

        if ($dayOfWeek == 6) {
            echo '</tr><tr>';
        }
    }

    echo '</tr>';
    echo '</table>';
}

调用日历函数

generateCalendar(date('Y'), date('n'));

使用CSS样式

可以在HTML头部添加CSS样式来控制周末日期的外观：

<style>
    .weekend {
        color: red;
        font-weight: bold;
    }
</style>

然后在PHP代码中使用这个类：

$class = '';
if ($dayOfWeek == 0 || $dayOfWeek == 6) {
    $class = 'class="weekend"';
}
echo "<td $class>$day</td>";

完整示例代码

<?php
function generateCalendar($year, $month) {
    $firstDay = mktime(0, 0, 0, $month, 1, $year);
    $daysInMonth = date('t', $firstDay);
    $dayOfWeek = date('w', $firstDay);

    echo '<table border="1">';
    echo '<tr><th>Sun</th><th>Mon</th><th>Tue</th><th>Wed</th><th>Thu</th><th>Fri</th><th>Sat</th></tr>';

    echo '<tr>';
    for ($i = 0; $i < $dayOfWeek; $i++) {
        echo '<td></td>';
    }

    for ($day = 1; $day <= $daysInMonth; $day++) {
        $currentDay = mktime(0, 0, 0, $month, $day, $year);
        $dayOfWeek = date('w', $currentDay);

        $style = '';
        if ($dayOfWeek == 0 || $dayOfWeek == 6) {
            $style = 'style="color: red;"';
        }

        echo "<td $style>$day</td>";

        if ($dayOfWeek == 6) {
            echo '</tr><tr>';
        }
    }

    echo '</tr>';
    echo '</table>';
}

generateCalendar(date('Y'), date('n'));
?>