我知道这类问题对于这里的人来说太容易了，但我是PHP / SQL的初学者，因此出于个人学习的原因，我正在为容量方面的课程制作覆盖文件系统。它由学生填写覆盖表单，其提交到具有教授姓名的覆盖数据库。当教授登录时，他会看到要求进入班级的覆盖表格。在教授接受表格之后，它也会被部门负责人接受。现在，问题在于：当教授点击＆＃34;接受＆＃34;时，我会如何制作它，它会用一个额外的行写出相同的数据（称为教授对部门主管的评论评论）进入head数据库并将其从当前覆盖数据库中删除，以便它不再存在，因为教授已接受覆盖。
我尝试将其作为一个表单并且它可以工作，它提交到Head的数据库但是每当我尝试将注释部分或任何新列添加到代码中时，它就会停止写入数据库。此外，如果数据库中有多个覆盖显示为教授，并且一个被接受/拒绝，它会将所有覆盖写入数据库而不是接受/拒绝的覆盖。如果我在代码中犯了错误，那将会很棒。请忽略我的代码的样式，因为我是一个php初学者，现在它很乱。
这是我能够做的，这是全班代码：
<?php
include_once 'includes/db_connect.php';
include_once 'includes/functions.php';
sec_session_start();
$servername = "localhost";
$username = "";
$password = "";
$dbname = "";
$user = $_SESSION['username'];
?>
<!DOCTYPE html>
<html>
<?php
$mysqli = new Mysqli($servername, $username, $password, $dbname) or mysqli_error($mysqli);
$usertype = $mysqli->query("SELECT usertype FROM student WHERE username = '$user'")->fetch_object()->usertype;
$mysqli = new Mysqli($servername, $username, $password, $dbname) or mysqli_error($mysqli);
$name = $mysqli->query("SELECT name FROM student WHERE username = '$user'")->fetch_object()->name;
?>
<?php if (login_check($mysqli) == true) : ?>
<p>Welcome <?php echo htmlentities($name); ?>!</p>
<?php if ($usertype == 0) { ?>
<form method="post" action="dboverride.php" name="OverrideForm" id="OverrideForm" autocomplete="off">
<fieldset>
<legend><b>Personal Details</b></legend>
<div>
<label for="name" accesskey="N">First Name</label>
<?php
$mysqli = new Mysqli($servername, $username, $password, $dbname) or mysqli_error($mysqli);
$name = $mysqli->query("SELECT name FROM student WHERE username = '$user'")->fetch_object()->name;
print_r($name);
?>
</div>
<br>
<div>
<label for="mname" accesskey="M">Mid. Name</label>
<?php
$mysqli = new Mysqli($servername, $username, $password, $dbname) or mysqli_error($mysqli);
$mname = $mysqli->query("SELECT mname FROM student WHERE username = '$user'")->fetch_object()->mname;
print_r($mname);
?>
</div>
<br>
<div>
<label for="fname" accesskey="F">Last Name</label>
<?php
$mysqli = new Mysqli($servername, $username, $password, $dbname) or mysqli_error($mysqli);
$fname = $mysqli->query("SELECT fname FROM student WHERE username = '$user'")->fetch_object()->fname;
print_r($fname);
?>
</div>
<br>
<div>
<label for="sid" accesskey="i">Student ID</label>
<?php
$mysqli = new Mysqli($servername, $username, $password, $dbname) or mysqli_error($mysqli);
$sid = $mysqli->query("SELECT sid FROM student WHERE username = '$user'")->fetch_object()->sid;
print_r($sid);
?>
</div>
<br>
<div>
<label for="email" accesskey="E">Email</label>
<?php
$mysqli = new Mysqli($servername, $username, $password, $dbname) or mysqli_error($mysqli);
$email = $mysqli->query("SELECT email FROM student WHERE username = '$user'")->fetch_object()->email;
print_r($email);
?>
</div>
<br>
<div>
<label for="phone" accesskey="p">Phone No.</label>
<?php
$mysqli = new Mysqli($servername, $username, $password, $dbname) or mysqli_error($mysqli);
$phone = $mysqli->query("SELECT phone FROM student WHERE username = '$user'")->fetch_object()->phone;
print_r($phone);
?>
</div>
<br>
<div>
<label for="sc" accesskey="s">Scolarship</label>
<?php
$mysqli = new Mysqli($servername, $username, $password, $dbname) or mysqli_error($mysqli);
$Scolarship = $mysqli->query("SELECT Scolarship FROM student WHERE username = '$user'")->fetch_object()->Scolarship;
print_r($Scolarship);
?>
</div>
</fieldset>
<br >
<fieldset>
<legend><b>Subject Details</b></legend>
<div>
<label for="class" accesskey="c">Subject</label>
<input name="class" type="text" id="class" size="50" required />
</div>
<br>
<div>
<label for="section" accesskey="o">Section</label>
<input name="section" type="number" id="section" min="1" max="9" required />
</div>
<br>
<div>
<label for="semester" accesskey="S">Semester</label>
<select name="semester" id="semester" required="required">
<option value="F15">Fall 2015</option>
<option value="S15">Summer 2015</option>
<option value="SP16">Spring 2016</option>
</select>
</div>
</fieldset>
<br >
<fieldset>
<legend><b>Agreement</b></legend>
<form action="#" onSubmit="if(document.getElementById('agree').checked) { return true; } else { alert('Please indicate that you have agreed on the terms'); return false; }">
<input type="checkbox" name="checkbox" value="check" id="agree" required /> By checking this box, i am fully responsible for the data entered above. I am also providing my official online signature to be liable in however the site may use it for.
<br> <i><font size="2"> * Date and time are recorded for various reasons.</font></i>
<br><br>
<label for="date" accesskey="c">   Current Date & Time : </label>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="Content-Script-Type" content="text/javascript">
<meta name="Content-Style-Type" content="text/css">
<script type="text/javascript">
document.write ('<span id="date-time">', new Date().toLocaleString(), '<\/span>')
if (document.getElementById) onload = function () {
setInterval ("document.getElementById ('date-time').firstChild.data = new Date().toLocaleString()", 50)
}
</script>
</fieldset>
<br>
<input type="submit" class="submit" id="submit" value="Submit" /> <input type="reset" value="Reset"><br>
</form>
</form>
<?php
} else if ($usertype == 1) {
$server = "localhost";
$user = "aukwizcq_user";
$pass = "r=Sc!~ZcFoBK";
$db = "aukwizcq_overrides";
$db2 = "aukwizcq_headforms";
$db3 = "aukwizcq_deanforms";
$user1 = $_SESSION['username'];
$mysqli = new Mysqli($server, $user, $pass, $db) or mysqli_error($mysqli);
$QUERY = new Mysqli($server, $user, $pass, $db2) or mysqli_error($mysqli);
$QUERY2 = new Mysqli($server, $user, $pass, $db3) or mysqli_error($mysqli);
$overrides = $mysqli->query("SELECT * FROM Overrides WHERE professor = '$user1'");
$num_rows = mysqli_num_rows($overrides);
?>
<?php
echo " Overrides today: " . $num_rows;
?>
<?php
while($row = mysqli_fetch_array($overrides)) { ?>
<fieldset> <?php
echo "First Name: " . $row['name'] . "<br />";
echo "<br />Mid. Name: " . $row['mname'] . "<br />";
echo "<br />Fam. Name: " . $row['fname'] . "<br />";
echo "<br />Student ID: " . $row['sid'] . "<br />";
echo "<br />Scolarship: " . $row['sc'] . "<br />";
echo "<br />Phone No: " . $row['phone'] . "<br />";
echo "<br />Email: " . $row['email'] . "<br />";
echo "<br />Class: " . $row['class'] . "<br />";
echo "<br />Section: " . $row['section'] . "<br />";
echo "<br />Semester: " . $row['semester'] . "<br />";
$name = $row['name'];
$mname = $row['mname'];
$fname = $row['fname'];
$sid = $row['sid'];
$sc = $row['sc'];
$phone = $row['phone'];
$email = $row['email'];
$class = $row['class'];
$section = $row['section'];
$semester = $row['semester'];
?>
<br />
<div>
<form method="post" action="dbheads.php" name="HeadWritingForm" id="HeadWritingForm" autocomplete="off">
<label for="comments" accesskey="c">Notes & Comments:</label><br />
<input type="textarea" name="comments" id="comments" cols="35" rows="10">
</textarea><br>
</div>
<br>
<input type="submit" class="submit" id="submit" value="Accept" /><br><br>
<?php if(Accept) { $prepare = $QUERY->prepare("INSERT INTO `headforms`(`name`,`mname`,`fname`,`sid`,`email`,`phone`,`sc`,`class`,`section`,`semester`,`comments`) VALUES (?,?,?,?,?,?,?,?,?,?,?)");
$prepare->bind_param("sssssssssss", $name, $mname, $fname, $sid, $email, $phone, $sc, $class, $section, $semester, $_POST['comments']); $prepare->execute(); } ?>
</form>
<form method="post" action="dbheads2.php" name="deny" id="deny" autocomplete="off">
<input type="submit" class="submit" id="submit" value="Deny" /><br><br>
<?php if(Deny) { $prepare = $QUERY2->prepare("INSERT INTO `deanforms`(`name`,`mname`,`fname`,`sid`,`email`,`phone`,`sc`,`class`,`section`,`semester`) VALUES (?,?,?,?,?,?,?,?,?,?)");
$prepare->bind_param("ssssssssss", $name, $mname, $fname, $sid, $email, $phone, $sc, $class, $section, $semester); $prepare->execute(); } ?>
</form>
</fieldset>
<br>
<?php }
?>
<br />
<?php
} else if ($usertype == 2) {
$server1 = "localhost";
$user1 = "aukwizcq_user";
$pass1 = "r=Sc!~ZcFoBK";
$db1 = "aukwizcq_headforms";
$user2 = $_SESSION['username'];
$mysqli = new Mysqli($server1, $user1, $pass1, $db1) or mysqli_error($mysqli);
$headforms = $mysqli->query("SELECT * FROM headforms WHERE professor = '$user2'");
$num_rows2 = mysqli_num_rows($headforms);
echo "Overrides today: " . $num_rows2;
while($row2 = mysqli_fetch_array($headforms)) {
echo "<br /><br />First Name: " . $row2['name'] . "<br />";
echo "<br />Middle Name: " . $row2['mname'] . "<br />";
echo "<br />Family Name: " . $row2['fname'] . "<br />";
echo "<br />Student ID: " . $row2['sid'] . "<br />";
echo "<br />Scolarship: " . $row2['sc'] . "<br />";
echo "<br />Phone No: " . $row2['phone'] . "<br />";
echo "<br />Email: " . $row2['email'] . "<br />";
echo "<br />Class: " . $row2['class'] . "<br />";
echo "<br />Section: " . $row2['section'] . "<br />";
echo "<br />Semester: " . $row2['semester'] . "<br />";
}
?>
<?php
} else if ($usertype == 3) {
$server2 = "localhost";
$user2 = "aukwizcq_user";
$pass2 = "r=Sc!~ZcFoBK";
$db2 = "aukwizcq_registrarforms";
$user3 = $_SESSION['username'];
$mysqli = new Mysqli($server2, $user2, $pass2, $db2) or mysqli_error($mysqli);
$registrarforms = $mysqli->query("SELECT * FROM registrarforms WHERE professor = '$user3'");
$num_rows3 = mysqli_num_rows($registrarforms);
echo "Overrides today: " . $num_rows3;
while($row3 = mysqli_fetch_array($registrarforms)) {
echo "<br /><br />First Name: " . $row3['name'] . "<br />";
echo "<br />Middle Name: " . $row3['mname'] . "<br />";
echo "<br />Family Name: " . $row3['fname'] . "<br />";
echo "<br />Student ID: " . $row3['sid'] . "<br />";
echo "<br />Scolarship: " . $row3['sc'] . "<br />";
echo "<br />Phone No: " . $row3['phone'] . "<br />";
echo "<br />Email: " . $row3['email'] . "<br />";
echo "<br />Class: " . $row3['class'] . "<br />";
echo "<br />Section: " . $row3['section'] . "<br />";
echo "<br />Semester: " . $row3['semester'] . "<br />";
}
?>
<?php
} else if ($usertype == 4) {
$server3 = "localhost";
$user3 = "aukwizcq_user";
$pass3 = "r=Sc!~ZcFoBK";
$db3 = "aukwizcq_deanforms";
$user4 = $_SESSION['username'];
$mysqli = new Mysqli($server3, $user3, $pass3, $db3) or mysqli_error($mysqli);
$deanforms = $mysqli->query("SELECT * FROM deanforms WHERE professor = '$user4'");
$num_rows4 = mysqli_num_rows($deanforms);
echo "Overrides today: " . $num_rows4;
while($row4 = mysqli_fetch_array($deanforms)) {
echo "<br /><br />First Name: " . $row4['name'] . "<br />";
echo "<br />Middle Name: " . $row4['mname'] . "<br />";
echo "<br />Family Name: " . $row4['fname'] . "<br />";
echo "<br />Student ID: " . $row4['sid'] . "<br />";
echo "<br />Scolarship: " . $row4['sc'] . "<br />";
echo "<br />Phone No: " . $row4['phone'] . "<br />";
echo "<br />Email: " . $row4['email'] . "<br />";
echo "<br />Class: " . $row4['class'] . "<br />";
echo "<br />Section: " . $row4['section'] . "<br />";
echo "<br />Semester: " . $row4['semester'] . "<br />";
}
}
?>
<?php else : ?>
<p>
<span class="error">You are not authorized to access this page.</span> Please <a href="index.php">login</a>.
</p>
<?php endif; ?>
</html>
不要介意上面的整个代码，我正在做的工作就在这里：
<?php
} else if ($usertype == 1) {
$server = "localhost";
$user = "";
$pass = "";
$db = "";
$db2 = "";
$db3 = "";
$user1 = $_SESSION['username'];
$mysqli = new Mysqli($server, $user, $pass, $db) or mysqli_error($mysqli);
$QUERY = new Mysqli($server, $user, $pass, $db2) or mysqli_error($mysqli);
$QUERY2 = new Mysqli($server, $user, $pass, $db3) or mysqli_error($mysqli);
$overrides = $mysqli->query("SELECT * FROM Overrides WHERE professor = '$user1'");
$num_rows = mysqli_num_rows($overrides);
?>
<?php
echo " Overrides today: " . $num_rows;
?>
<?php
while($row = mysqli_fetch_array($overrides)) { ?>
<fieldset> <?php
echo "First Name: " . $row['name'] . "<br />";
echo "<br />Mid. Name: " . $row['mname'] . "<br />";
echo "<br />Fam. Name: " . $row['fname'] . "<br />";
echo "<br />Student ID: " . $row['sid'] . "<br />";
echo "<br />Scolarship: " . $row['sc'] . "<br />";
echo "<br />Phone No: " . $row['phone'] . "<br />";
echo "<br />Email: " . $row['email'] . "<br />";
echo "<br />Class: " . $row['class'] . "<br />";
echo "<br />Section: " . $row['section'] . "<br />";
echo "<br />Semester: " . $row['semester'] . "<br />";
$name = $row['name'];
$mname = $row['mname'];
$fname = $row['fname'];
$sid = $row['sid'];
$sc = $row['sc'];
$phone = $row['phone'];
$email = $row['email'];
$class = $row['class'];
$section = $row['section'];
$semester = $row['semester'];
?>
<br />
<div>
<form method="post" action="dbheads.php" name="HeadWritingForm" id="HeadWritingForm" autocomplete="off">
<label for="comments" accesskey="c">Notes & Comments:</label><br />
<input type="textarea" name="comments" id="comments" cols="35" rows="10">
</textarea><br>
</div>
<br>
<input type="submit" class="submit" id="submit" value="Accept" /><br><br>
<?php if(Accept) { $prepare = $QUERY->prepare("INSERT INTO `headforms`(`name`,`mname`,`fname`,`sid`,`email`,`phone`,`sc`,`class`,`section`,`semester`,`comments`) VALUES (?,?,?,?,?,?,?,?,?,?,?)");
$prepare->bind_param("sssssssssss", $name, $mname, $fname, $sid, $email, $phone, $sc, $class, $section, $semester, $_POST['comments']); $prepare->execute(); } ?>
</form>
<form method="post" action="dbheads2.php" name="deny" id="deny" autocomplete="off">
<input type="submit" class="submit" id="submit" value="Deny" /><br><br>
<?php if(Deny) { $prepare = $QUERY2->prepare("INSERT INTO `deanforms`(`name`,`mname`,`fname`,`sid`,`email`,`phone`,`sc`,`class`,`section`,`semester`) VALUES (?,?,?,?,?,?,?,?,?,?)");
$prepare->bind_param("ssssssssss", $name, $mname, $fname, $sid, $email, $phone, $sc, $class, $section, $semester); $prepare->execute(); } ?>
</form>
</fieldset>
<br>
<?php }
?>
<br />
dboverride.php：
<?php
$mysql_host = "localhost";
$mysql_username = "";
$mysql_password = "";
$mysql_database = "";
$mysqli = new Mysqli($mysql_host, $mysql_username, $mysql_password, $mysql_database) or die(mysqli_error());
$prepare = $mysqli->prepare("INSERT INTO `Overrides`(`name`,`mname`,`fname`,`sid`,`email`,`phone`,`sc`,`class`,`section`,`semester`) VALUES (?,?,?,?,?,?,?,?,?,?)");
$prepare->bind_param("ssssssssss", $_POST['name'], $_POST['mname'], $_POST['fname'], $_POST['sid'], $_POST['email'], $_POST['phone'], $_POST['sc'], $_POST['class'], $_POST['section'], $_POST['semester']);
$prepare->execute();
if ($prepare) {
echo 'Your form has been submitted';
} else {
echo 'Sorry';
}
?>
答案 0 :(得分：1)
为什么不添加具有相同内容的整个新行，而不是创建列“approved_prof”或只是“已批准”，如果它在第一个阶段，则默认值为0，当教授批准它，你将只需要将值从0更新为1，然后检查任何匹配“approved”=“1”的记录，以显示给部门负责人，所以他批准它，此时你可以将它更新为= 2 ....你以这种方式保存了很多mysql资源。和检查/更新更容易