PHP日历

<?php
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SimCalendar('2011-08');
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function SimCalendar($date)
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{
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    /**
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     * 简单日历输出,本函数需要cal_days_in_month的支持
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     * @param $date Y-m 要输出的日期
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     */
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    echo '<table border="1">
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    <thead>
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        <tr>
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            <th>日</th>
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            <th>一</th>
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            <th>二</th>
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            <th>三</th>
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            <th>四</th>
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            <th>五</th>
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            <th>六</th>
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        </tr>
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    </thead>
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    <tbody>';
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        $date_array = explode('-', $date);
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        $start_week = 0;//从星期天开始为0
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        $month = cal_days_in_month(CAL_GREGORIAN, $date_array[1], $date_array[0]);//当月的天数
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        $wstar = date('w', strtotime($date . '-01'));//当月从星期几天始
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        $rows = ceil(($wstar + $month) / 7);//总行数
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        $mday = 1;//第几天
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        for ($i = 0; $i < $rows; $i++) {
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            echo '<tr>';
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            for ($d = 0; $d < 7; $d++) {
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                $nowday = 7 * $i + $d + $start_week;
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                if ($nowday >= $wstar && $mday <= $month) {
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                    $temp = date('d', strtotime($date . '-' . $mday));
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                    echo '<td>'.$temp . '</td>';
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                    $mday++;
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                } else {
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                    echo '<td>&nbsp;</td>';
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                }
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            }
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            echo '</tr>';
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        }
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    echo &