這個自己的小項目要先告一段落了?？赡苓€有許多bug。請見諒
刪除學生功能
PHP:
// 這里是通過前端代碼HTML中的 url 傳過來的，用 $_GET 來獲取(相關HTML代碼可以看一下到主頁看一下前幾條博客)if (empty($_GET['num'])) exit('<h1>找不到您要刪除的學生的學號</h1>');$num = $_GET['num'];$connection = mysqli_connect('localhost', 'root', '密碼', 'students_info_system');if (!$connection) exit('<h1>連接數據庫失敗</h1>');$query = mysqli_query($connection, "delete from students where num = {$num}");if (!$query) exit('<h1>該學生信息查詢失敗</h1>');// 注意：這里傳入的是連接對象$affected_rows = mysqli_affected_rows($connection);if ($affected_rows !== 1) exit('<h1>刪除失敗</h1>');header('Location: student_info.php');編輯學生功能(整體上和添加學生功能差不到，稍微有些許變化)
HTML:
<!DOCTYPE html><html><head> <meta charset="utf-8"> <title>編輯學生</title> <link rel="stylesheet" type="text/css" href="css/Bootstrap.css" rel="external nofollow" ></head><body> <div class="container mt-3"> <h1 class="display-5 text-center">編輯學生</h1> <?php if (isset($error_msg)): ?> <div class="alert alert-danger"><?php echo $error_msg; ?></div> <?php endif ?> <div class="row mt-3"> <img src="<?php echo $current_student['photo']; ?>" <form action="<?php echo $_SERVER['PHP_SELF']; ?>?id=<?php echo $current_num; ?>" method="post" enctype="multipart/form-data" autocomplete="off" class="col-sm-6"> <div class="form-group"> <input type="number" name="num" class="form-control" placeholder="學號" value="<?php echo isset($_POST['num']) ? $_POST['num'] : $current_student['num']; ?>"> </div> <div class="form-group"> <select class="form-control" name="system"> <option>請選擇學院/系</option> <option <?php echo $current_student['system'] === '電氣工程學院' ? 'selected' : ''; ?>>電氣工程學院</option> <option <?php echo $current_student['system'] === '信息工程與藝術學院' ? 'selected' : ''; ?>>信息工程與藝術學院</option> <option <?php echo $current_student['system'] === '國際教育學院' ? 'selected' : ''; ?>>國際教育學院</option> <option <?php echo $current_student['system'] === '水利水電工程學院' ? 'selected' : ''; ?>>水利水電工程學院</option> <option <?php echo $current_student['system'] === '測繪與市政工程學院' ? 'selected' : ''; ?>>測繪與市政工程學院</option> <option <?php echo $current_student['system'] === '馬克思主義學院' ? 'selected' : ''; ?>>馬克思主義學院</option> <option <?php echo $current_student['system'] === '建筑工程學院' ? 'selected' : ''; ?>>建筑工程學院</option> <option <?php echo $current_student['system'] === '經濟與管理學院' ? 'selected' : ''; ?>>經濟與管理學院</option> </select> </div> <div class="form-group"> <input type="text" name="class" class="form-control" placeholder="班級" value="<?php echo isset($_POST['class']) ? $_POST['class'] : $current_student['class']; ?>"> </div> <div class="form-group"> <input type="text" name="name" class="form-control" placeholder="姓名" value="<?php echo isset($_POST['name']) ? $_POST['name'] : $current_student['name']; ?>"> </div> <div class="form-group"> <select class="form-control" name="gender"> <option value="-1">請選擇性別</option> <option <?php echo $current_student['gender'] === '1' ? 'selected' : ''; ?> value="1">男</option> <option <?php echo $current_student['gender'] === '0' ? 'selected' : ''; ?> value="0">女</option> </select> </div> <div class="form-group"> <label for="birthday">出生日期</label> <input type="date" name="birthday" class="form-control" id="birthday" value="<?php echo isset($_POST['birthday']) ? $_POST['birthday'] : $current_student['birthday']; ?>"> </div> <div class="form-group"> <label for="photo">照片</label> <input type="file" name="photo" class="form-control"> </div> <button type="submit" class="btn btn-info btn-block">確認修改</button> </form> </div> </div></body></html>
PHP:
if (empty($_GET['id'])) exit('<h1>必須指定相應的學號</h1>');$current_num = $_GET['id'];$connection = mysqli_connect('localhost', 'root', '密碼', 'students_info_system');if (!$connection) exit('<h1>連接數據庫失敗</h1>');$query = mysqli_query($connection, "select * from students where num = {$current_num} limit 1");if (!$query) exit('<h1>找不到您要編輯的學生信息</h1>');$current_student = mysqli_fetch_assoc($query);// var_dump($current_student);function edit_student() { // var_dump('進來了'); global $connection; global $current_num; // 當前學生學號 global $current_student; $extra_students_query = mysqli_query($connection, "select * from students where num != {$current_num}"); if (!$extra_students_query) { exit('<h1>其余學生數據查詢失敗</h1>'); // return; } // 查詢除該學生以外的其他學生 while ($student = mysqli_fetch_assoc($extra_students_query)) { // var_dump($student); $students_num[] = $student['num']; } // var_dump($students_num); // var_dump($_FILES['photo']); // var_dump($_POST['gender']); if (empty($_POST['num'])) { $GLOBALS['error_msg'] = '請輸入學號'; return; } // 判斷該學號是否已經被添加(即列表中已存在該學生)========= if (in_array($_POST['num'], $students_num)) { $GLOBALS['error_msg'] = '該學生已存在'; return; } if (empty($_POST['system']) || $_POST['system'] === '請選擇學院/系') { $GLOBALS['error_msg'] = '請選擇學院/系'; return; } if (empty($_POST['class'])) { $GLOBALS['error_msg'] = '請輸入班級'; return; } if (empty($_POST['name'])) { $GLOBALS['error_msg'] = '請輸入姓名'; return; } if (!(isset($_POST['gender']) && $_POST['gender'] !== '-1')) { $GLOBALS['error_msg'] = '請選擇性別'; return; } if (empty($_POST['birthday'])) { $GLOBALS['error_msg'] = '請輸入出生日期'; return; } // 以下處理文件域======================================================= // 當有文件上傳時才驗證，沒有上傳則照片不變 // $_FILES['photo'] = $current_student['photo']; // var_dump($_FILES['photo']); if ($_FILES['photo']['name'] !== '') { // var_dump($_FILES['photo']); // var_dump($_FILES['photo']); if ($_FILES['photo']['error'] !== UPLOAD_ERR_OK) { $GLOBALS['error_msg'] = '上傳照片失敗'; return; } // 驗證上傳文件的類型(只允許圖片) if (strpos($_FILES['photo']['type'], 'image/') !== 0) { $GLOBALS['error_msg'] = '這不是支持的文件格式類型，請重新上傳'; return; } // 文件上傳到了服務端開辟的一個臨時地址，需要轉移到本地 $image_target = 'images/' . $_FILES['photo']['name']; if (!move_uploaded_file($_FILES['photo']['tmp_name'], $image_target)) { $GLOBALS['error_msg'] = '圖片上傳失敗'; return; } // 接收更新過的學生照片 $current_student['photo'] = (string)$image_target; } else { // var_dump($_FILES['photo']); // 如果照片沒有上傳則不進行驗證文件域,直接更新數據且不改變原來的照片 $current_student['num'] = $_POST['num']; $current_student['system'] = $_POST['system']; $current_student['class'] = $_POST['class']; $current_student['name'] = $_POST['name']; $current_student['gender'] = $_POST['gender']; $current_student['birthday'] = $_POST['birthday']; } // var_dump($current_num); // 將數據修改存放到數據庫 $update_query = mysqli_query($connection, "update students set `num` = '{$current_student['num']}', `system` = '{$current_student['system']}', `class` = '{$current_student['class']}', `name` = '{$current_student['name']}', `gender` = '{$current_student['gender']}', `birthday` = '{$current_student['birthday']}', `photo` = '{$current_student['photo']}' where `num` = {$current_num}"); if (!$update_query) { $GLOBALS['error_msg'] = '更新數據查詢失敗'; return; } $affected_rows = mysqli_affected_rows($connection); if ($affected_rows !== 1) { $GLOBALS['error_msg'] = '修改失敗'; return; } // 延遲2秒 time_sleep_until(time() + 2); header('Location: student_info.php');}if ($_SERVER['REQUEST_METHOD'] === 'POST') { edit_student();}搜索功能（用js）
// 關鍵詞搜索功能----立即函數(function (element, search_key) { let table = document.getElementById('table-content'); // 獲取表格 function in_array_item (item, array) { for (var i = 0; i < array.length; i++) { if (array[i].indexOf(item) != -1) { return true; } } return false; } function response () { let hiddenStudentsNumber = 0; // 獲取隱藏的學生個數(即表格隱藏行數) // 獲取要搜索的關鍵詞 const search_content = document.getElementById(search_key).value; // console.log(search_content); // console.log(typeof(search_content)); let data = []; // 遍歷列表將數據存儲到一個數組中 // 1.獲取表格行數 for (let i = 0; i < table.children.length; i++) { // 2.獲取表格列數 for (let j = 0; j < table.children[i].children.length; j++) { if (!data[i]) { // 在數組中創鍵每一行內容存放的數組，用于存放一行數據 data[i] = new Array(); } data[i][j] = table.children[i].children[j].innerHTML.toString(); // 3.存放數據 if (data[i][j] === '♂') { data[i][j] = '男'; } if (data[i][j] === '♀') { data[i][j] = '女'; } } // console.log(data[i]); if (search_content == '') { table.children[i].style.display = ''; } else { if (in_array_item(search_content, data[i])) { table.children[i].style.display = ''; } else { table.children[i].style.display = 'none'; hiddenStudentsNumber += 1; } } } console.log(hiddenStudentsNumber); let str = "共有" + (table.children.length - hiddenStudentsNumber) + "名學生"; document.getElementById('students_number').innerHTML = str; } const searchButton = document.getElementById(element); searchButton.addEventListener('click', function () { response(); }); document.addEventListener('keydown', function (event) { if (event.keyCode === 13) { response(); } }); let str = "共有" + table.children.length + "名學生"; document.getElementById('students_number').innerHTML = str;})('search', 'search-key');同時在原有的學生信息頁面HTML添加：
<div class="row mt-3"> <a class="btn btn-info col-sm-2" style="margin-right: 28px; margin-left: 15px;" href="add_student.php" rel="external nofollow" >添加學生</a> // 添加的 <button class="btn btn-info align-middle" id="students_number"></button> <input type="text" class="form-control col-sm-6 ml-2" autocomplete="on" placeholder="請輸入關鍵詞" value="" id="search-key"> <button type="submit" class="btn btn-info col-sm-2 ml-2" id="search">點擊搜索</button> </div>
總結
以上所述是小編給大家介紹的PHP 結合 Boostrap 結合 js 實現學生列表刪除編輯及搜索功能，希望對大家有所幫助，如果大家有任何疑問歡迎給我留言，小編會及時回復大家的！
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