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php日历实现

2026-02-14 11:34:40PHP

PHP日历实现方法

使用PHP实现日历功能可以通过多种方式完成，以下是几种常见的方法：

基础日历实现

通过PHP的日期函数结合HTML表格生成简单日历：

<?php
$month = date('m');
$year = date('Y');
$daysInMonth = cal_days_in_month(CAL_GREGORIAN, $month, $year);
$firstDay = date('N', strtotime("$year-$month-01"));

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

$dayCount = 1;
echo '<tr>';
for ($i = 1; $i < $firstDay; $i++) {
    echo '<td></td>';
}

for ($i = $firstDay; $i <= 7; $i++) {
    echo "<td>$dayCount</td>";
    $dayCount++;
}
echo '</tr>';

while ($dayCount <= $daysInMonth) {
    echo '<tr>';
    for ($i = 1; $i <= 7 && $dayCount <= $daysInMonth; $i++) {
        echo "<td>$dayCount</td>";
        $dayCount++;
    }
    echo '</tr>';
}
echo '</table>';
?>

使用DateTime类

更现代的PHP日期处理方式：

<?php
$date = new DateTime();
$month = $date->format('m');
$year = $date->format('Y');

$firstDay = new DateTime("$year-$month-01");
$daysInMonth = $firstDay->format('t');
$startDay = $firstDay->format('N');

$calendar = '<table>';
$calendar .= '<tr><th>Mon</th><th>Tue</th><th>Wed</th><th>Thu</th><th>Fri</th><th>Sat</th><th>Sun</th></tr><tr>';

for ($i = 1; $i < $startDay; $i++) {
    $calendar .= '<td></td>';
}

for ($day = 1; $day <= $daysInMonth; $day++) {
    if (($day + $startDay - 2) % 7 == 0 && $day != 1) {
        $calendar .= '</tr><tr>';
    }
    $calendar .= "<td>$day</td>";
}

$calendar .= '</tr></table>';
echo $calendar;
?>

添加事件功能

为日历添加事件显示功能：

<?php
$events = [
    '2023-11-15' => '团队会议',
    '2023-11-20' => '项目截止'
];

$date = new DateTime();
$month = $date->format('m');
$year = $date->format('Y');

$calendar = '<table>';
$calendar .= '<tr><th>Mon</th><th>Tue</th><th>Wed</th><th>Thu</th><th>Fri</th><th>Sat</th><th>Sun</th></tr><tr>';

$firstDay = new DateTime("$year-$month-01");
$daysInMonth = $firstDay->format('t');
$startDay = $firstDay->format('N');

for ($i = 1; $i < $startDay; $i++) {
    $calendar .= '<td></td>';
}

for ($day = 1; $day <= $daysInMonth; $day++) {
    $currentDate = "$year-$month-" . str_pad($day, 2, '0', STR_PAD_LEFT);
    $event = isset($events[$currentDate]) ? '<br>' . $events[$currentDate] : '';

    if (($day + $startDay - 2) % 7 == 0 && $day != 1) {
        $calendar .= '</tr><tr>';
    }
    $calendar .= "<td>$day$event</td>";
}

$calendar .= '</tr></table>';
echo $calendar;
?>