これは、学生がオリエンテーションセッションに参加するための時間にサインアップするための登録フォームです。私はすでにメールアドレスフィールドをデータベースのUNIQUEフィールドにしました。
私がする必要があるのは、電子メールアドレスが存在するかどうかです。つまり、学生はオリエンテーションに行くための日時にすでにサインアップしています。そのため、「そのメールアドレスは既に存在します」というエラーメッセージを返す代わりに、「オリエンテーションの日時にすでに登録しています。で登録しました。日を変更したい場合は」というメッセージを返します。 / time、最初の日/時間をキャンセルしてから、戻って新しい時間にサインアップしてください。」
したがって、データベースを検索して、サインアップした日時を見つけ、ユーザーが複数回サインアップしようとしたときに返されるカスタマイズされたメッセージでそれを返す方法を知る必要があります。
<?php
// set the mode
if(isset($_GET['p'])) $mode = $_GET['p'];
else if(isset($_POST['p'])) $mode = $_POST['p'];
else $mode = '';
// sanitize input
if(isset($_GET['time_id'])) {
$timestamp = (int)$_GET['timestamp'];
$time_id = (int)$_GET['time_id'];
}
if(isset($_POST['time_id'])) {
$timestamp = (int)$_POST['timestamp'];
$time_id = (int)$_POST['time_id'];
}
// validate input
$error = '';
if(date("G", $timestamp) != 0)
$error .= 'Invalid timestamp.<br/>';
if(($time_result = valid_time_id($time_id)) == false)
$error .= 'Invalid time id.<br/>';
else
$time_row = mysql_fetch_array($time_result);
switch($mode) {
default:
break;
case "schedule":
// sanitize input
$first_name = sanitize_input($_POST['first_name']);
$last_name = sanitize_input($_POST['last_name']);
$email = sanitize_input($_POST['email']);
$retype_email = sanitize_input($_POST['retype_email']);
$college_id = sanitize_input($_POST['college_id']);
$retype_college_id = sanitize_input($_POST['retype_college_id']);
$phone = sanitize_input($_POST['phone']);
$first = (isset($_POST['first']) ? 1 : 0);
$verification = $_POST['verification'];
// validate input
$error = '';
if(empty($first_name))
$error .= 'You must enter a first name.<br>';
if(empty($last_name))
$error .= 'You must enter a last name.<br>';
if(!valid_email($email))
$error .= 'Invalid email.<br>';
if($email != $retype_email)
$error .= 'The two email addresses don\'t match.<br>';
if(!valid_college_id($college_id))
$error .= 'Invalid student id. Student id must contain seven digits including zeros.<br>';
if($college_id != $retype_college_id)
$error .= 'The two student ids don\'t match.<br>';
if(empty($phone))
$error .= 'You must enter a phone number.<br>';
$student_result = db_query("select id from ".$GLOBALS['db_pre']."student where canceled='0' and timestamp='".$timestamp."' and time_id='".$time_id."'");
if(mysql_num_rows($student_result) >= $time_row['slots'])
$error .= 'Sorry, too many people are already scheduled for this time slot.<br>';
if($_SESSION['captcha'] != $verification)
$error .= 'Invalid image verification.<br>';
// if there's no error
if($error == '') {
// schedule it
db_query("insert into ".$GLOBALS['db_pre']."student set first_name='".$first_name
."',last_name='".$last_name
."',email='".$email
."',college_id='".$college_id
."',phone='".$phone
."',timestamp='".$timestamp
."',time_id='".$time_id
."',unschedule_code='".md5(time())
."',inserted_at='".gmdate("Y-m-d H:i:s")
."'");
$student_id = mysql_insert_id();
// send email to student
$subject = "A-B Tech New Student Appointment Confirmation";
if(current_site() == "orientation") $subject = "A-B Tech New Student Orientation";
else $subject = "A-B Tech Campus Tour";
$message = format_text("Scheduling Email", $student_id);
email($email, $subject, $message);
// get the start and end times for the appointment
$time_result = db_query("select * from ".$GLOBALS['db_pre']."time where id='".$time_id."'");
$time_row = mysql_fetch_array($time_result);
//$timestamp_start = strtotime(date("F j, Y", $timestamp).", ".$time_row['time']);
//$timestamp_end = strtotime("+1 hour", $timestamp_start);
/*// send email, with calendar attachment, to counselors
if(current_site() == "orientation") $subject = "A-B Tech New Student Orientation: ";
else $subject = "A-B Tech Campus Tour: ";
$subject .= date("F j, Y", $timestamp).", ".$time_row['time']."; ".$first_name." ".$last_name."";
$message = "A student has scheduled an appointment:\r\n\r\n";
$message .= "Name: ".$first_name." ".$last_name."\r\n";
$message .= "Date: ".date("F j, Y", $timestamp).", ".$time_row['time']."\r\n";
$message .= "Email: ".$email."\r\n";
$message .= "Phone: ".$phone."\r\n";
// send the email to all the counselors
$user_result = db_query("select * from user where no_email=0");
while($user_row = mysql_fetch_array($user_result)) {
email($user_row['email'], $subject, $message);
}*/
}
break;
}
// captcha image verification
srand(time());
$_SESSION['captcha'] = substr(md5(rand(1,9999)), rand(1,15), 5);
$_SESSION['captcha'] = str_replace("O", "1", $_SESSION['captcha']); // to avoid confusion
$_SESSION['captcha'] = str_replace("o", "2", $_SESSION['captcha']); // ...
$_SESSION['captcha'] = str_replace("0", "3", $_SESSION['captcha']); // ...
// the top layout
layout_top(date("F j, Y", $timestamp).', '.$time_row['time']);
// the middle layout
switch($mode) {
default:
if($mode == "schedule" && $error == "") {
echo display_text("Scheduling Text", $student_id);
?><p><a href="index.php">Click here to go back</a></p><?php
} else {
?>
<h1 align="center" style="padding-bottom: 0; margin-bottom: 0;"><?=strtoupper(date("F j, Y", $timestamp).' '.$time_row['time'])?></h1>
<p align="center" style="padding-top: 0; margin-top: 0;"><strong><a href="index.php?month=<?=date("n", $timestamp)?>&year=<?=date("Y", $timestamp)?>">choose another date</a></strong></p>
<?php if($mode == "schedule" && $error != '') { ?>
<p class="error"><?=$error?></p>
<?php } ?>
<form action="<?=$_SERVER['PHP_SELF']?>" method="post">
<input type="hidden" name="p" value="schedule">
<input type="hidden" name="timestamp" value="<?=$timestamp?>">
<input type="hidden" name="time_id" value="<?=$time_id?>">
<fieldset>
<legend>Schedule an appointment for this date</legend>
<p>Fill out this form to schedule a New Student appointment on this date. Make sure you use a valid email address.</p>
<ul>
<li>
<label for="first_name">First Name</label>
<input type="text" name="first_name"<?=($mode == "schedule" ? ' value="'.$first_name.'"' : '')?>>
</li>
<li>
<label for="last_name">Last Name</label>
<input type="text" name="last_name"<?=($mode == "schedule" ? ' value="'.$last_name.'"' : '')?>>
</li>
<li>
<label for="email">Email</label>
<input type="text" name="email" size="30"<?=($mode == "schedule" ? ' value="'.$email.'"' : '')?>>
</li>
<li>
<label for="retype_email">Retype Email</label>
<input type="text" name="retype_email" size="30"<?=($mode == "schedule" ? ' value="'.$retype_email.'"' : '')?>>
</li>
<li>
<label for="college_id">Student ID(For your student ID#, please refer to the e-mail you received regarding your A-B Tech WebAdvisor and Email Accounts.) </label>
<input type="text" name="college_id" size="30"<?=($mode == "schedule" ? ' value="'.$college_id.'"' : '')?>>
</li>
<li>
<label for="retype_college_id">Retype Student ID</label>
<input type="text" name="retype_college_id" size="30"<?=($mode == "schedule" ? ' value="'.$retype_college_id.'"' : '')?>>
</li>
<li>
<label for="phone">Phone</label>
<input type="text" name="phone"<?=($mode == "schedule" ? ' value="'.$phone.'"' : '')?>>
</li>
<li>
<label for="verification">Verification</label>
<img src="../images/verify.php" width="180" height="40" alt="Verification"><br/>
<input type="text" name="verification" size="10"> <small>« type the characters in the image above into this box</small>
</li>
<li>
<input type="submit" value="Submit">
</li>
</ul>
</fieldset>
</form>
<?php
}
break;
}
// the bottom layout
layout_bottom();
?>