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我想將我的文本框student_number的屬性更改爲只讀後，我單擊提交按鈕（查找） 任何建議要做到這一點。我需要在isset函數（搜索）之後立即將腳本插入到php代碼中嗎？單擊提交按鈕後，使文本框的屬性更改爲只讀
<style>
.login{
width: 500px;
margin: 50px auto;
font: Georgia, "Times New Roman", Times, serif;
border-radius: 10px;
border: 2px solid #ccc;
padding: 15px 50px 25px;
margin-top: 60px;
margin-left: -370px;
width: 1000px;
}
body {
background-color:#0CF;
}
</style>
<link href="css/admin.css" rel="stylesheet" type="text/css" />
<?php
session_start();
if (!isset($_SESSION["sess_user"])) {
header("Location: login.php");
} else {
include 'dbconnection.php';
$id = "";
$first_name = "";
$middle_name = "";
$last_name = "";
$student_number = "";
$program = "";
$year_level = "";
$faculty_name = "";
$reported_by = "";
$violation_1 = "";
$violation_2 = "";
$violation_3 = "";
// Search
if (isset($_POST['search'])) {
$data = mysqli_real_escape_string($con, $_POST['student_number']);
$search_Query = "SELECT * FROM register WHERE student_number = '$data'";
$search_Result = mysqli_query($con, $search_Query);
if (mysqli_num_rows($search_Result) > 0) {
while ($row = mysqli_fetch_array($search_Result)) {
$id = $row['id'];
$first_name = $row['first_name'];
$middle_name = $row['middle_name'];
$last_name = $row['last_name'];
$student_number = $row['student_number'];
$program = $row['program'];
$year_level = $row['year_level'];
$faculty_name = $row['faculty_name'];
$reported_by = $row['reported_by'];
$violation_1 = $row['violation_1'];
$violation_2 = $row['violation_2'];
$violation_3 = $row['violation_3'];
}
} else {
echo 'No record found with this Student Number.';
}
}
// Insert
if (isset($_POST['insert'])) {
$data = array();
$data[1] = mysqli_real_escape_string($con, $_POST['id']);
$data[2] = mysqli_real_escape_string($con, $_POST['first_name']);
$data[3] = mysqli_real_escape_string($con, $_POST['middle_name']);
$data[4] = mysqli_real_escape_string($con, $_POST['last_name']);
$data[5] = mysqli_real_escape_string($con, $_POST['student_number']);
$data[6] = mysqli_real_escape_string($con, $_POST['program']);
$data[7] = mysqli_real_escape_string($con, $_POST['year_level']);
$data[8] = mysqli_real_escape_string($con, $_POST['faculty_name']);
$data[9] = mysqli_real_escape_string($con, $_POST['reported_by']);
$data[10] = mysqli_real_escape_string($con, $_POST['violation_1']);
$data[11] = mysqli_real_escape_string($con, $_POST['violation_2']);
$data[12] = mysqli_real_escape_string($con, $_POST['violation_3']);
$query = "SELECT student_number FROM register WHERE student_number = '$data[5]'";
$search_Result = mysqli_query($con, $query);
if (mysqli_num_rows($search_Result) > 0) {
echo 'student number taken';
} else {
$insert_Query = "INSERT INTO `register` (
`first_name`,
`middle_name`,
`last_name`,
`student_number`,
`program`,
`year_level`,
`faculty_name`,
`reported_by`,
`violation_1`,
`violation_2`,
`violation_3`
) VALUES (
'$data[2]',
'$data[3]',
'$data[4]',
'$data[5]',
'$data[6]',
'$data[7]',
'$data[8]',
'$data[9]',
'$data[10]',
'$data[11]',
'$data[12]'
)";
if (mysqli_query($con, $insert_Query)) {
echo 'Record was added successfully.';
} else {
echo 'Adding of record failed.';
}
}
}
// Edit
if (isset($_POST['update'])) {
$data = array();
$data[1] = mysqli_real_escape_string($con, $_POST['id']);
$data[2] = mysqli_real_escape_string($con, $_POST['first_name']);
$data[3] = mysqli_real_escape_string($con, $_POST['middle_name']);
$data[4] = mysqli_real_escape_string($con, $_POST['last_name']);
$data[5] = mysqli_real_escape_string($con, $_POST['student_number']);
$data[6] = mysqli_real_escape_string($con, $_POST['program']);
$data[7] = mysqli_real_escape_string($con, $_POST['year_level']);
$data[8] = mysqli_real_escape_string($con, $_POST['faculty_name']);
$data[9] = mysqli_real_escape_string($con, $_POST['reported_by']);
$data[10] = mysqli_real_escape_string($con, $_POST['violation_1']);
$data[11] = mysqli_real_escape_string($con, $_POST['violation_2']);
$data[12] = mysqli_real_escape_string($con, $_POST['violation_3']);
$update_Query = "UPDATE `register` SET
`first_name`='$data[2]',
`middle_name`='$data[3]',
`last_name`='$data[4]',
`student_number`='$data[5]',
`program`='$data[6]',
`year_level`='$data[7]',
`faculty_name`='$data[8]',
`reported_by`='$data[9]',
`violation_1`='$data[10]',
`violation_2`='$data[11]',
`violation_3`='$data[12]'
WHERE `id` = '$data[1]'";
if (mysqli_query($con, $update_Query)) {
echo 'Record was updated successfully.';
} else {
echo 'Updating of record failed.';
}
}
if(isset($_POST["homeBtn"])){
header("Location:admin.php");
}
?>
<!DOCTYPE Html>
<html>
<head>
<title>Cant decide a title</title>
</head>
<h3>WELCOME</h3><h3><?=$_SESSION['sess_user'];?>!</h3><a href="logout.php">logout</a>
<body>
<div id="form">
<div class="login">
<H1>SECOND VIOLATION</H1>
<form action="violation_2.php" method="post">
<input type="hidden" name="id" placeholder="Id" value="<?php echo $id; ?>"><br><br>
<label>*Student Number:</label><br><input type="text" id="student_number" name="student_number" placeholder="Student Number" value="<?php echo $student_number; ?>"><br><br><br><br><br><br>
<label>First Name:</label><br> <input readonly type="text" id="first_name" name="first_name" placeholder="First Name" value="<?php echo $first_name; ?>"><br><br>
<label>Middle Name:</label><br><input readonly type="text" id="middle_name" name="middle_name" placeholder="Middle Name" value="<?php echo $middle_name; ?>"><br><br>
<label>Last Name:</label><br><input readonly type="text" id="last_name" name="last_name" placeholder="Last Name" value="<?php echo $last_name; ?>"><br><br>
<label>Program:</label><br><input readonly type="text" id="program" name="program" placeholder="Program" value="<?php echo $program; ?>"><br><br>
<label>Year Level:</label><br><input readonly type="text" id="year_level" name="year_level" placeholder="Year Level" value="<?php echo $year_level; ?>"><br><br>
<label>Faculty Name:</label><br><input readonly type="text" id="faculty_name" name="faculty_name" placeholder="Faculty Name" value="<?php echo $faculty_name; ?>"><br><br>
<label>Reported By:</label><br><input readonly type="text" id="reported_by" name="reported_by" placeholder="Reported By" value="<?php echo $reported_by; ?>"><br><br>
<label>First Violation:</label><br><input readonly type="text" id="violation_1" name="violation_1" placeholder ="First Violation" value="<?php echo $violation_1 ?>"><br><br>
<label>Second Violation:</label><br><input readonly type="text" id="violation_2" name="violation_2" placeholder ="Second Violation" value="<?php echo $violation_2 ?>"><br><br>
<label>Third Violation:</label><br><input readonly type="text" id="violation_3" name="violation_3" placeholder ="Third Violation" value="<?php echo $violation_3 ?>"><br><br>
<p>
<label>
<input type="radio" name="violation_2" value="Not in uniform or improper wearing of uniform" id="RadioGroup1_0">
Not in uniform or improper wearing of uniform</label>
<br>
<label>
<input type="radio" name="violation_2" value="Wearing of earrings" id="RadioGroup1_1">
Wearing of earrings(Male)</label>
<br>
<input type="radio" name="violation_2" value="Loitering during class hours" id="RadioGroup1_1">
Loitering during class hours</label><br>
<input type="radio" name="violation_2" value="Playing of games inside the computer laboratory room" id="RadioGroup1_1">
Playing of games inside the computer laboratory room</label><br>
<input type="radio" name="violation_2" value="Un-authorized access to sites like Youtube, Facebook and other social media sites" id="RadioGroup1_1">
Un-authorized access to sites like Youtube, Facebook and other social media sites</label><br>
<input type="radio" name="violation_2" value="Downloading of files not duly authorized by the faculty concerned" id="RadioGroup1_1">
Downloading of files not duly authorized by the faculty concerned</label><br>
<input type="radio" name="violation_2" value="Tampering, theft or vandalizing the computer units" id="RadioGroup1_1">
Tampering, theft or vandalizing the computer units</label><br>
<input type="radio" name="violation_2" value="Conduct unbecoming of a CCS student" id="RadioGroup1_1">
Conduct unbecoming of a CCS student</label><br>
<input type="radio" name="violation_2" value="Not wearing of ID" id="RadioGroup1_1">
Not wearing of ID</label><br>
<input type="radio" name="violation_2" value="Sporting long hair" id="RadioGroup1_1">
Sporting long hair</label><br>
<input type="radio" name="violation_2" value="Littering" id="RadioGroup1_1">
Littering</label><br>
<input type="radio" name="violation_2" value="Un-authorized stay inside a lecture or laboratory room during vacant periods" id="RadioGroup1_1">
Un-authorized stay inside a lecture or laboratory room during vacant periods</label><br>
</p>
<input type="submit" name="update" value="Add Violation ">
<script>
function changeText(){
var text_box = document.getElementById('student_number');
text_box.setAttribute('readonly','readonly');
}
</script>
<input type="submit" name="search" value="Find" onClick="changeText();">
<input type="submit" name="homeBtn" value="Home">
</form>
</div>
</div>
</body>
</html>
<?php
}
?>
的可能的複製[你如何才能讓一個文本框只讀使用JavaScript（http://stackoverflow.com/questions/22414984/how-do-you-make-a-text-box -readonly-using-javascript） – cteski
你遇到的問題到底是什麼？您只是將其設置爲只讀，但隨即立即提交表單。所以你不會注意到屬性已經設置的事實。 –
謝謝你的回答。之所以這樣寫，是因爲我需要使用學號來輸出其中的所有值並進行更新。我需要將文本框student_number屬性更改爲只讀，以便在我需要更新學生違規時不會更改或更新student_number –