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这是生成该人将看到的表格的代码（默认使用 $date 作为今天的日期，如果他们选择未来的日期或过去的日期，$date 会根据 URL 变量更改。$time 只是 $row[time]）

$query = mysql_query("SELECT * FROM times", $db);
while ($row = mysql_fetch_array($query)){ //grab all available times
    $time = $row[time];
    $query2 = mysql_query("SELECT * FROM appts WHERE time = '$time' AND date = '$date' ", $db); //select all appointments that match current date and available times
    $aptid = $apt[id];

    while($apt = mysql_fetch_array($query2))
    {
    $mem = $apt[mem];    
    if($mem != ''){
        $class = 'green';
    }
    $ns = $apt[ns];
    $x = $apt[x];
    if($ns || $x != ''){
        $class = 'yellow';
    }
    echo "<tr><td class='$class'>$apt[date_set]</td><td class='$class'>";
    echo date('h:i A', strtotime($row[time]));
    echo "</td>";
    $aptid = $apt[id];
    echo "<td class='$class'>$apt[name]</td>
    <td class='$class'>$apt[phone]</td>
    <td class='$class'>$apt[phone2]</td>
    <td class='$class'>$apt[src]</td>
    <td class='$class'>$apt[coach]</td>
    <td class='$class'>$apt[v1]</td>
    <td class='$class'>$apt[v2]</td>
    <td class='$class'>$apt[mem]</td>
    <td align='center' class='$class'>$apt[x]</td>
    <td align='center' class='$class'>$apt[ns]</td>
    <td class='$class'>$apt[comments]</td>
    <td align='center'>";
    if($aptid != ''){//i dont want to display options on blank rows
        echo "<a href='index.php?date=$date&apptid=$aptid&action=edit'>Edit</a> &nbsp;
        <a href='index.php?year=$year&month=$month&date=$date&apptid=$aptid&action=x'>X</a>&nbsp; 
        <a href='index.php?year=$year&month=$month&date=$date&apptid=$aptid&action=ns'>NS</a>&nbsp;";
        //<a href='index.php?year=$year&month=$month&date=$date&apptid=$aptid&action=delete'>Delete</a> (HIDDEN FOR NOW)
    }
    echo "</td></tr>";
    }   
}

?>
    </tbody>
</table>

这是向数据库添加新记录的代码

<div class='dialog' title='New Appointment'>
    <form id='newappt' method='post'>
        <table>
            <tr>
                <td>Time</td>
                <td><select name='time'>
                <? $query = mysql_query("SELECT * FROM times", $db); //set time option as times available from times db
                   while($row = mysql_fetch_array($query)){
                    echo "<option value = '$row[time]'>";
                    echo date('h:i A', strtotime($row[time])); 
                    echo "</option>";
                   }
                ?>
                </td>
            </tr>
            <tr>
                <td>Date</td>
                <td><input type='text' id='datepicker' name='date'></td>
            </tr>
            <tr>
                <td>Name</td>
                <td><input type='text' name='name'></td>
            </tr>
            <tr>
                <td>Phone</td>
                <td><input type='text' name='phone'></td>
            </tr>
            <tr>
                <td>Phone 2</td>
                <td><input type='text' name='phone2'></td>
            </tr>
            <tr>
                <td>Src</td>
                <td><input type='text' name='src'></td>
            </tr>
            <tr>
                <td>Coach</td>
                <td><input type='text' name='coach'></td>
            </tr>
            <tr>
                <td>Comments</td>
                <td><input type='text' name='comments'></td>
            </tr>
        </table>
        <input type='submit' name='submit-newappt' value='Add Appointment'>
    </form>
</div>

然后继承人提交时会发生什么：

    if($_POST['submit-newappt']){ //when submitted insert new record and display success message.
        $dateset = date("Y-m-d");
        $q = "INSERT INTO appts (date_set, time, date, name, phone, phone2, src, coach, comments) VALUES ('$dateset', '$_POST[time]', '$_POST[date]', '$_POST[name]', '$_POST[phone]', '$_POST[phone2]', '$_POST[src]', '$_POST[coach]', '$_POST[comments]')";
        $result = mysql_query($q) or die(mysql_error());    
        echo "<br>New appointment added successfully for ";
        echo $_POST['name'];
        echo " at ";
        echo $_POST['date'];
        echo " at ";
        echo date('h:i A', strtotime($_POST['time']));
    }

所以说我今天正在查看，表格将显示今天日期的所有约会。然后我在 2013 年 7 月 14 日“添加新约会”。它更改表格以显示我刚刚添加约会而不是今天停留的任何日期的约会。

tl; dr(ish) - 为什么向数据库添加新记录时我的 php 查询会发生变化？

日期来自：

if(isset($_GET['date'])){
        $date = $_GET['date'];
    }
    if(!$date){
        $date = date('Y-m-d');
    }
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