[英]php HTML timetable
我关于SO的第一篇文章。 我正在研究基于php的时间表模块。 看来我90%的代码都能正常工作。 只是无法正确显示循环以时间表格式显示我的数据。
我希望自己的时间表像这样的表:
我的代码:
//Array for days starting from 1 for monday
$days = array('1','2','3','4','5','6','7');
//Selecting all the hours from lectures
$hours = select id, start_time from lectures;
$timetable = select timetable.id, timetable.day, timetable.lecture_id, timetable.subject_id from timetable;
echo "<table>";
echo "<tr>";
//echo "<td>";
// echo "Day";
//echo "</td>";
foreach($hours as $hh)
{
echo "<td>";
{echo $hh->start_time;}
echo "</td>";
}
echo "</tr>";
foreach($hours as $hour)
{
foreach($days as $day)
{
echo "<tr>";
foreach($timetable as $tt)
{
echo "<td>";
if ($tt->day==$day AND $tt->lecture_id==$hour->id)
{echo $tt->subject_id;}
echo "</td>";
}
echo "</tr>";
}
}
echo "</table>";
我的输出如下。 可以,但是我无法将Days放在行的开头。 任何人都可以帮我解决这个小问题。 我想我搞砸了HTML
您可能需要在第一行中显示开始时间的空白单元格,然后为包含主题的每一行添加一个显示星期几的单元格。
另外,我觉得如果在SQL中使用ORDER BY子句,则可能会将三重for循环减少到至少双倍for循环。 也许按天排序,然后按开始时间排序(对于开始时间,您需要与讲课表连接)。 似乎外循环应该迭代数天,而内循环则要迭代开始时间。
编辑:如果您要交叉连接不同的日期和开始时间,甚至可以只有一个循环,按天数然后按开始时间排序,然后使用实际时间表进行左外部连接。 您最终将在每一行中都有NULL,这些NULL与没有安排的讲座的日期和时间相对应。 您还将知道查询每天提供相同数量的行。 这样,您可以每N行创建一个新的<tr />
,其中N是一天中的开始时间。
EDIT2:关于循环嵌套,我的意思是这样的:
foreach($days as $day)
{
echo "<tr>"; // Every day is a table row
echo "<td>" . getDayNameByNumber($day) . "</td>" // use one of the methods being suggested here, i.e. indexing into an array of names, a built-in function if PHP has it (would be better, because it would likely follow the system's locale and translate it for you...)
foreach($hours as $hour)
{
// Every hour in a day is a cell in the row
// optimize this loop...
foreach($timetable as $tt)
{
echo "<td>";
if ($tt->day==$day AND $tt->lecture_id==$hour->id)
{echo $tt->subject_id;}
echo "</td>";
}
echo "</tr>";
}
}
首先,请确保您要调用正确的MySQL表字段。
如果是,则将$ days数组更改为带有工作日名称的双向数组,在循环中添加day单元格,在顶部添加一个空单元格。 (请参见代码注释)
<?php
// days of week array
$days = array(
1 => 'Monday',
2 => 'Tuesday',
3 => 'Wednesday',
4 => 'Thursday',
5 => 'Friday',
6 => 'Saturday',
7 => 'Sunday' );
//Selecting all the hours from lectures
// $hours = select id, start_time from lectures;
// $timetable = select timetable.id, timetable.day, timetable.lecture_id, timetable.subject_id from timetable;
echo "<table>";
echo "<tr>";
echo '<td></td>'; // empty cell
foreach( $hours as $hh ) {
echo "<td>";
echo $hh->start_time;
echo "</td>";
}
echo "</tr>";
foreach( $hours as $hour ) {
foreach( $days as $day => $day_name ) {
echo "<tr>";
echo '<td>', $day_name, '</td>'; // day of the week
foreach( $timetable as $tt ) {
echo "<td>";
if( (int)$tt->day == $day and $tt->lecture_id == $hour->id ) {
echo $tt->subject_id;
}
echo "</td>";
}
echo "</tr>";
}
}
echo "</table>";
?>
如果您不想创建双向数组,请使用PHP的函数jddayofweek() 。 这是一个例子:
<?php
//Array for days starting from 1 for monday
$days = array( 1, 2, 3, 4, 5, 6, 7 );
foreach ( $days as $day ) {
echo jddayofweek( $day - 1, 1 ), '<br>';
}
?>
但是,出于性能原因,我建议您使用双向阵列。
谷歌搜索后是否做到了
$days = array("1"=>"Monday", "2"=>"Tuesday", "3"=>"Wednesday", "4"=>"Thursday", "5"=>"Friday", "6"=>"Saturday", "7"=>"Sunday", );
$hours = DB::table('timetablelectures')->select('timetablelectures.id', 'timetablelectures.start_time')
->get();
$timetable = DB::table('timetable')->select('timetable.id', 'timetable.day', 'timetable.lecture_id', 'timetable.subject_id')
->get();
//SET UP SCHEDULE
$schedule = array();
foreach($timetable as $tt)
{
foreach($days as $x => $x_value)
{
if ( $tt->day==$x)
{
$schedule["{$x}"][$tt->lecture_id][] = $tt->subject_id;
}
}
}
// DISPLAY SCHEDULE, headers first
?>
<table border="1">
<tr><td align="center">Time</td>
<?php foreach ( $hours as $hour )
{
echo "<td> $hour->start_time </td>";
}
echo "</tr>";
foreach ( $days as $x => $x_value) {
echo "<tr><td>$x_value</td>";
// roll through days
foreach ( $hours as $hour ) {
echo '<td>';
// check for subjects in this slot
if ( isset($schedule[$x][$hour->id]) ) {
// and display each
foreach ( $schedule[$x][$hour->id] as $subject ) {
echo "$subject<br>";
}
}
echo '</td>';
}
echo '</tr>';
}
echo '</table>';
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