[英]"while($row = mysqli_fetch_array($result))" might be empty?
我現在真的很困惑，請幫助...這是您將編輯所選用戶的編輯/更新部分。 問題是我認為 $row 或 array 是空的。 問題是那部分。 我接受對我的代碼的任何建議以使其更好。
<!DOCTYPE html> <html> <head> <title></title> </head> <body> <form method="POST" action="uprec.php"> <?php if(isset($_POST["borrower_id"])){ $output = ''; $connect = mysqli_connect("localhost", "root", "", "librarydb"); $query = "SELECT * FROM tbl_books WHERE id = '".$_POST["borrower_id"]."'"; $result = mysqli_query($connect, $query); echo "Connected "; while($row = mysqli_fetch_array($result)){ echo "fetch success"; } echo "fetch failed"; } else{ echo "Not Connected"; } ?> <input type="submit" name="update" id="update" value="UPDATE" class="btn btn-success" /> </form> </body> </html>
<?php session_start(); ?> <!DOCTYPE html> <html> <head> <title>Database</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css"> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js"></script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"></script> <script src="script/livesearch.js"></script> </head> <body> <nav class="navbar navbar-expand-md bg-dark navbar-dark"> <a class="navbar-brand" href="#">Home</a> <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#collapsibleNavbar"> <span class="navbar-toggler-icon"></span> </button> <div class="collapse navbar-collapse" id="collapsibleNavbar"> <ul class="navbar-nav"> <li class="nav-item"> <a class="nav-link" href="#">Books</a> </li> <li class="nav-item"> <a class="nav-link" href="#">Transactions</a> </li> <li class="nav-item"> <a class="nav-link" href="#">Accounts</a> </li> <li class="nav-item"> <a class="nav-link" href="logout.php">Logout</a> </li> </ul> </div> </nav> <?php if(!empty($_SESSION)) { ?> <div class="container p-3"> <h1 class="">Library Database</h1> <hr><br> <form> <div class="input-group "> <div class="input-group-prepend"> <span class="input-group-text">Search</span> </div> <input type="text" name="search_text" id="search_text" class="form-control" /> </div> </form> <br /> <button type="button" class="btn btn-primary mb-3" data-toggle="modal" data-target="#addbook_modal">Add Book</button> <div id="result"></div> </div> <hr> <?php }else echo '<div class="alert alert-danger alert-dismissible fade show"> <strong>Login Required!</strong> You needed to be login first before you can access the database. <a href="login.php"> Go back to login</a> </div>'; ?> </body> </html> <script> $(document).ready(function() { $('#addbook_form').on("submit", function(event) { event.preventDefault(); if ($('#booktitle').val() == "") { alert("Book Title is required"); } else if ($('#category').val() == '') { alert("Category is required"); } else if ($('#author').val() == '') { alert("Author is required"); } else if ($('#publishername').val() == '') { alert("Publisher Name is required"); } else if ($('#datepublished').val() == '') { alert("Date Published is required"); } else if ($('#copies').val() == '') { alert("Copies is required"); } else { $.ajax({ url: "insert.php", method: "POST", data: $('#addbook_form').serialize(), beforeSend: function() { $('#addbtn').val("Inserting"); }, success: function(data) { $('#addbook_form')[0].reset(); $('#addbook_modal').modal('hide'); $('#result').html(data); } }); } }); }); $(document).on('click', '#editbtn', function() { var borrower_id = $(this).attr("id"); $.ajax({ url: "update.php", method: "POST", data: { borrower_id: borrower_id }, success: function(data) { $('#borrower_detail').html(data); $('#editbook_modal').modal('show'); console.log(data); } }); }); </script> <div id="addbook_modal" class="modal fade" role="dialog"> <div class="modal-dialog"> <div class="modal-content"> <div class="modal-header"> <h4 class="modal-title">Add Book</h4> <button type="button" class="close" data-dismiss="modal">×</button> </div> <div class="modal-body"> <form method="POST" id="addbook_form"> <div class="form-group"> <label>Book Title:</label> <input type="text" name="booktitle" id="booktitle" class="form-control" placeholder="Title of the Book"> </div> <div class="form-group"> <label>Category:</label> <select name="category" id="category" class="custom-select"> <option>Art</option> <option>English</option> <option>Math</option> <option>Science</option> <option>Filipino</option> </select> </div> <div class="form-group"> <label>Author:</label> <input type="text" name="author" id="author" class="form-control" placeholder="Author of the Book"> </div> <div class="form-group"> <label>Publisher Name:</label> <input type="text" name="publishername" id="publishername" class="form-control" placeholder="Name of the Publisher"> </div> <div class="form-group"> <label>Date Published</label> <input type="date" name="datepublished" id="datepublished" class="form-control" placeholder="Date of Publication"> </div> <div class="form-group"> <label>Copies</label> <input type="number" name="copies" id="copies" class="form-control" placeholder="Number of Copies"> </div> <div class="form-group"> <button id="addbtn" class="btn btn-success">Add</button> </div> </form> </div> <div class="modal-footer"> <button type="submit" class="btn btn-danger" data-dismiss="modal">Close</button> </div> </div> </div> </div> <div id="editbook_modal" class="modal fade"> <div class="modal-dialog"> <div class="modal-content"> <div class="modal-header"> <h4 class="modal-title">Edit Book Details</h4> <button type="button" class="close" data-dismiss="modal">×</button> </div> <div class="modal-body" id="borrower_detail"> </div> <div class="modal-footer"> <button type="button" class="btn btn-danger" data-dismiss="modal">Close</button> </div> </div> </div> </div>
<?php session_start(); include ('connection.php'); if(!empty($_SESSION)) { $output = ''; if(isset($_POST["query"])) { $search = mysqli_real_escape_string($connect, $_POST["query"]); $query = " SELECT * FROM tbl_books WHERE booktitle LIKE '%".$search."%' OR category LIKE '%".$search."%' OR author LIKE '%".$search."%' OR copies LIKE '%".$search."%' OR publishername LIKE '%".$search."%' OR datepublished LIKE '%".$search."%' "; } else { $query = " SELECT * FROM tbl_books ORDER BY id DESC "; } $result = mysqli_query($connect, $query); if(mysqli_num_rows($result) > 0) { $output .= ' <div class="table-responsive" id="employee_table"> <table class="table table-bordered"> <thead> <tr> <th>Book Title</th> <th>Category</th> <th>Author</th> <th>Publisher Name</th> <th>Date Published</th> <th>Copies</th> <th>Action</th> </tr> </thead> '; while($row = mysqli_fetch_array($result)) { $output .= ' <tr> <td>'.$row["booktitle"].'</td> <td>'.$row["category"].'</td> <td>'.$row["author"].'</td> <td>'.$row["publishername"].'</td> <td>'.$row["datepublished"].'</td> <td>'.$row["copies"].'</td> <td><button type="submit" class="btn btn-success btn-sm" id="editbtn">Edit</button> <button type="submit" class="btn btn-danger btn-sm">Delete</button> </td> </tr> '; } echo $output; } else { echo 'Data Not Found'; } }else echo '<div class="alert alert-danger alert-dismissible fade show"> <strong>Login Required!</strong> You needed to be login first before you can access the database. <a href="login.php"> Go back to login</a> </div>'; ?>
目前 $_POST["borrower_id"] 一直都是 "editbtn"。 所以查詢總是返回零個條目。
你的問題是這個
<button type="submit" class="btn btn-success btn-sm" id="editbtn">Edit</button>
這應該是這樣的
<button type="submit" class="btn btn-success btn-sm" id="editbtn" bookid='.$row['id'].'>Edit</button>
$row['id'] 取決於您的 id 字段的名稱。
你也必須改變
var borrower_id = $(this).attr("id");
到
var borrower_id = $(this).attr("bookid");
這應該有效。
while($row = mysqli_fetch_array($result)) 是如何工作的？
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