crud 相关问题

我正在尝试为我的业务制作一个CRUD应用程序，我对PHP知之甚少。我遵循了一个已被证明是成功的指南，直到我到达更新部分。我正在尝试为我的业务制作一个 CRUD 应用程序，我对 PHP 知之甚少。我遵循了一个已被证明是成功的指南，直到我到达更新部分。 <?php $servername = "localhost"; $username = "root"; $password = ""; $database= "replog_test"; //create connection $connection = new mysqli($servername, $username, $password, $database); $id = ""; $service_dept=""; $po=""; $customer=""; $pcs=""; $equipment=""; $date_rec=""; $problem=""; $warr=""; $date_ship=""; $errorMessage = ""; $successMessage = ""; if ($_SERVER['REQUEST_METHOD'] == 'GET') { //GET method: Show the data of the client if (!isset($_GET["id"])) { header("location: /novasvm/index.php"); exit; } $id = $_GET["id"]; // read the row of the selected client from the database table $sql = "SELECT * FROM replog WHERE id=$id"; $result = $connection->query($sql); $row = $result->fetch_assoc(); if (!$row) { header("location: /novasvm/index.php"); exit; } $service_dept = $row["service_dept"]; $po = $row["po"]; $customer = $row["customer"]; $pcs = $row["pcs"]; $equipment = $row["equipment"]; $date_rec = $row["date_rec"]; $problem = $row["problem"]; $warr = $row["warr"]; $date_ship = $row["date_ship"]; } else { // POST method: Update the data of the client $service_dept = $_POST["service_dept"]; $po = $_POST["po"]; $customer = $_POST["customer"]; $pcs = $_POST["pcs"]; $equipment = $_POST["equipment"]; $date_rec = $_POST["date_rec"]; $problem = $_POST["problem"]; $warr = $_POST["warr"]; $date_ship = $_POST["date_ship"]; do { if ( empty($service_dept) || empty($po) || empty($customer) || empty($pcs) || empty($equipment) || empty($date_rec) || empty($problem) || empty($warr)) { $errorMessage = "All fields except DATE SHIPPED are required"; break; } $sql = "UPDATE replog " . "SET service_dept = '$service_dept', po = '$po', customer = '$customer', pcs = '$pcs', equipment = '$equipment', date_rec = '$date_rec', problem = '$problem', warr = '$warr', date_ship = '$date_ship' " . "WHERE id = '$id'"; $result = $connection->query($sql); if (!$result) { $errorMessage = "Invalid Query: " . $connection->error; break; } $successMessage = "Client Updated Correctly"; header("location: /novasvm/general/replog.php"); exit; } while(false); } ?> <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <link rel="stylesheet" href="../style.css" type="text/css"> <link rel="stylesheet" href="../reset.css" type="text/css"> <link rel="preconnect" href="https://fonts.googleapis.com"> <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin> <link href="https://fonts.googleapis.com/css2?family=Poppins&display=swap" rel="stylesheet"> <title>Repair Log</title> </head> <body> <div> <h2>New Data</h2> <?php if ( !empty($errorMessage)) { echo " <div> <strong>$errorMessage</strong> </div> "; } ?> <form method="post"> <input type="hidden" name="id" value="<?php echo $id; ?>"> <div> <label>Service Department</label> <div> <input type="text" name="service_dept" value="<?php echo $service_dept; ?>"> </div> </div> <div> <label>PO Number</label> <div> <input type="text" name="po" value="<?php echo $po; ?>"> </div> </div> <div> <label>Customer</label> <div> <input type="text" name="customer" value="<?php echo $customer; ?>"> </div> </div> <div> <label>Pieces</label> <div> <select name="pcs" id=""> <option value="" selected="selected"></option> <option value="1">1</option> <option value="2">2</option> <option value="3">3</option> <option value="4">4</option> <option value="5">5</option> <option value="6">6</option> <option value="7">7</option> <option value="8">8</option> <option value="9">9</option> </select> </div> </div> <div> <label>Equipment</label> <div> <input type="text" name="equipment" value="<?php echo $equipment; ?>"> </div> </div> <div> <label>Date Received</label> <div> <input type="date" name="date_rec" value="<?php echo $date_rec; ?>"> </div> </div> <div> <label>Problem / Serial No.</label> <div> <input type="text" name="problem" value="<?php echo $problem; ?>"> </div> </div> <div> <label>Warranty</label> <div> <select name="warr" id=""> <option value="" selected="selected"></option> <option value="yes">Yes</option> <option value="no">No</option> </select> </div> </div> <div> <label>Date Shipped</label> <div> <input type="date" name="date_ship" value="<?php echo $date_ship; ?>"> </div> </div> <?php if (!empty($successMessage)) { echo " <div> <strong>$successMessage</strong> </div> "; } ?> <div> <button type="submit">Submit</button> </div> <div> <a href="/novasvm/general/replog.php" role="button">Cancel</a> </div> </form> </div> </body> </html> 一旦我提交数据，它实际上就不会在 xampp 服务器或网页上更新。它保持完全相同。数据库信息的预期更新无法正常运行。您没有在实际的 $id 分支中为 else 语句设置 UPDATE...。试试这样： <?php $servername = "localhost"; $username = "root"; $password = ""; $database= "replog_test"; //create connection $connection = new mysqli($servername, $username, $password, $database); $id = ""; $service_dept=""; $po=""; $customer=""; $pcs=""; $equipment=""; $date_rec=""; $problem=""; $warr=""; $date_ship=""; $errorMessage = ""; $successMessage = ""; if ($_SERVER['REQUEST_METHOD'] == 'GET') { //GET method: Show the data of the client if (!isset($_GET["id"])) { header("location: /novasvm/index.php"); exit; } $id = $_GET["id"]; // read the row of the selected client from the database table $sql = "SELECT * FROM replog WHERE id=$id"; $result = $connection->query($sql); $row = $result->fetch_assoc(); if (!$row) { header("location: /novasvm/index.php"); exit; } $service_dept = $row["service_dept"]; $po = $row["po"]; $customer = $row["customer"]; $pcs = $row["pcs"]; $equipment = $row["equipment"]; $date_rec = $row["date_rec"]; $problem = $row["problem"]; $warr = $row["warr"]; $date_ship = $row["date_ship"]; } else { // POST method: Update the data of the client $service_dept = $_POST["service_dept"]; $po = $_POST["po"]; $customer = $_POST["customer"]; $pcs = $_POST["pcs"]; $equipment = $_POST["equipment"]; $date_rec = $_POST["date_rec"]; $problem = $_POST["problem"]; $warr = $_POST["warr"]; $date_ship = $_POST["date_ship"]; $id = $_POST["id"]; // <---------- do { if ( empty($service_dept) || empty($po) || empty($customer) || empty($pcs) || empty($equipment) || empty($date_rec) || empty($problem) || empty($warr)) { $errorMessage = "All fields except DATE SHIPPED are required"; break; } $sql = "UPDATE replog " . "SET service_dept = '$service_dept', po = '$po', customer = '$customer', pcs = '$pcs', equipment = '$equipment', date_rec = '$date_rec', problem = '$problem', warr = '$warr', date_ship = '$date_ship' " . "WHERE id = '$id'"; $result = $connection->query($sql); if (!$result) { $errorMessage = "Invalid Query: " . $connection->error; break; } $successMessage = "Client Updated Correctly"; header("location: /novasvm/general/replog.php"); exit; } while(false); } ?> <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <link rel="stylesheet" href="../style.css" type="text/css"> <link rel="stylesheet" href="../reset.css" type="text/css"> <link rel="preconnect" href="https://fonts.googleapis.com"> <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin> <link href="https://fonts.googleapis.com/css2?family=Poppins&display=swap" rel="stylesheet"> <title>Repair Log</title> </head> <body> <div> <h2>New Data</h2> <?php if ( !empty($errorMessage)) { echo " <div> <strong>$errorMessage</strong> </div> "; } ?> <form method="post"> <input type="hidden" name="id" value="<?php echo $id; ?>"> <div> <label>Service Department</label> <div> <input type="text" name="service_dept" value="<?php echo $service_dept; ?>"> </div> </div> <div> <label>PO Number</label> <div> <input type="text" name="po" value="<?php echo $po; ?>"> </div> </div> <div> <label>Customer</label> <div> <input type="text" name="customer" value="<?php echo $customer; ?>"> </div> </div> <div> <label>Pieces</label> <div> <select name="pcs" id=""> <option value="" selected="selected"></option> <option value="1">1</option> <option value="2">2</option> <option value="3">3</option> <option value="4">4</option> <option value="5">5</option> <option value="6">6</option> <option value="7">7</option> <option value="8">8</option> <option value="9">9</option> </select> </div> </div> <div> <label>Equipment</label> <div> <input type="text" name="equipment" value="<?php echo $equipment; ?>"> </div> </div> <div> <label>Date Received</label> <div> <input type="date" name="date_rec" value="<?php echo $date_rec; ?>"> </div> </div> <div> <label>Problem / Serial No.</label> <div> <input type="text" name="problem" value="<?php echo $problem; ?>"> </div> </div> <div> <label>Warranty</label> <div> <select name="warr" id=""> <option value="" selected="selected"></option> <option value="yes">Yes</option> <option value="no">No</option> </select> </div> </div> <div> <label>Date Shipped</label> <div> <input type="date" name="date_ship" value="<?php echo $date_ship; ?>"> </div> </div> <?php if (!empty($successMessage)) { echo " <div> <strong>$successMessage</strong> </div> "; } ?> <div> <button type="submit">Submit</button> </div> <div> <a href="/novasvm/general/replog.php" role="button">Cancel</a> </div> </form> </div> </body> </html>

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