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php - 仅删除选项不起作用 PHP CRUD

转载 作者:行者123 更新时间:2023-11-29 09:32:36 25 4
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我一直在研究基本的 PHP CRUD。我正在使用基于 PHP、AJAX、MySQL 的 CRUD。

我有添加/更新/删除/获取结果/搜索等功能。除了 Delete 选项之外,一切工作正常。我已经尝试了很多方法来解决这个问题,但似乎无法找到代码中的确切错误或错误。这是我用于 CRUD 操作的代码。

exam_packages.php

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Add / Update / Delete Exam Packages</title>
<link rel="stylesheet" href="css/bootstrap.min.css" type="text/css" media="all">
<link href="css/jquery.bootgrid.css" rel="stylesheet" />
<script src="js/jquery-1.11.1.min.js"></script>
<script src="js/bootstrap.min.js"></script>
<script src="js/jquery.bootgrid.min.js"></script>
</head>
<body>
<div class="container">
<div class="">
<h1 style="text-align: center;">Add / Update / Delete Exam Packages</h1>
<div class="col-sm-12">
<div class="well clearfix">
<div class="pull-right"><button type="button" class="btn btn-xs btn-primary" id="command-add" data-row-id="0">
<span class="glyphicon glyphicon-plus"></span> Add New Exam Package</button></div></div>
<table id="exam_package_grid" class="table table-condensed table-hover table-striped" width="60%" cellspacing="0" data-toggle="bootgrid">
<thead>
<tr>
<th data-column-id="pkg_id" data-type="numeric" data-identifier="true">Package ID</th>
<th data-column-id="test_quantity">Test Quantity</th>
<th data-column-id="price">Price</th>
<th data-column-id="commands" data-formatter="commands" data-sortable="false">Commands</th>
</tr>
</thead>
</table>
</div>
</div>
</div>

<div id="add_model" class="modal fade">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-hidden="true">&times;</button>
<h4 class="modal-title">Add New Exam Package</h4>
</div>
<div class="modal-body">
<form method="post" id="frm_add">
<input type="hidden" value="add" name="action" id="action">
<div class="form-group">
<label for="test_quantity" class="control-label">Test Quantity:</label>
<input type="text" class="form-control" id="test_quantity" name="test_quantity"/>
</div>
<div class="form-group">
<label for="price" class="control-label">Price:</label>
<input type="text" class="form-control" id="price" name="price"/>
</div>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
<button type="button" id="btn_add" class="btn btn-primary">Save</button>
</div>
</form>
</div>
</div>
</div>
<div id="edit_model" class="modal fade">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-hidden="true">&times;</button>
<h4 class="modal-title">Edit Exam Package</h4>
</div>
<div class="modal-body">
<form method="post" id="frm_edit">
<input type="hidden" value="edit" name="action" id="action">
<input type="hidden" value="0" name="edit_pkg_id" id="edit_pkg_id">
<div class="form-group">
<label for="test_quantity" class="control-label">Test Quantity:</label>
<input type="text" class="form-control" id="edit_test_quantity" name="edit_test_quantity"/>
</div>
<div class="form-group">
<label for="price" class="control-label">Price:</label>
<input type="text" class="form-control" id="edit_price" name="edit_price"/>
</div>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
<button type="button" id="btn_edit" class="btn btn-primary">Save</button>
</div>
</form>
</div>
</div>
</div>
</body>
</html>
<script type="text/javascript">
$( document ).ready(function() {
var grid = $("#exam_package_grid").bootgrid({
ajax: true,
rowSelect: true,
post: function ()
{
/* To accumulate custom parameter with the request object */
return {
id: "b0df282a-0d67-40e5-8558-c9e93b7befed"
};
},

url: "exam_package_response.php",
formatters: {
"commands": function(column, row)
{
return "<button type=\"button\" class=\"btn btn-xs btn-default command-edit\" data-row-id=\"" + row.pkg_id + "\"><span class=\"glyphicon glyphicon-edit\"></span></button> " +
"<button type=\"button\" class=\"btn btn-xs btn-default command-delete\" data-row-id=\"" + row.pkg_id + "\"><span class=\"glyphicon glyphicon-trash\"></span></button>";
}
}
}).on("loaded.rs.jquery.bootgrid", function()
{
/* Executes after data is loaded and rendered */
grid.find(".command-edit").on("click", function(e)
{
//alert("You pressed edit on row: " + $(this).data("row-id"));
var ele =$(this).parent();
var g_pkg_id = $(this).parent().siblings(':first').html();

//console.log(grid.data());//
$('#edit_model').modal('show');
if($(this).data("row-id") >0) {

// collect the data
$('#edit_pkg_id').val(ele.siblings(':first').html()); // in case we're changing the key
$('#edit_test_quantity').val(ele.siblings(':nth-of-type(2)').html());
$('#edit_price').val(ele.siblings(':nth-of-type(3)').html());
} else {
alert('No row selected! First select row, then click edit button');
}
}).end().find(".command-delete").on("click", function(e)
{

var conf = confirm('Delete No.' + $(this).data("row-id") + ' package?');
alert(conf);
if(conf==true){
// console.log($(this).data("row-id"));
$.post('exam_package_response.php', { id: $(this).data("row-id"), action:'delete'}, function()
{
$("#exam_package_grid").bootgrid('reload');
});
$(this).parent('tr').remove();
$("#exam_package_grid").bootgrid('remove', $(this).data("row-id"))
}
});
});

function ajaxAction(action) {
data = $("#frm_"+action).serializeArray();
$.ajax({
type: "POST",
url: "exam_package_response.php",
data: data,
dataType: "json",
success: function(response)
{
$('#'+action+'_model').modal('hide');
$("#exam_package_grid").bootgrid('reload');
}
});
}

$( "#command-add" ).click(function() {
$('#add_model').modal('show');
});
$( "#btn_add" ).click(function() {
ajaxAction('add');
});
$( "#btn_edit" ).click(function() {
ajaxAction('edit');
});
});
</script>

exam_package_resposnse.php

<?php
//include connection file
include_once("db_connection_mysqli.php");

$db = new dbObj();
$connString = $db->getConnstring();

$params = $_REQUEST;

// console.log($params);
// echo '<script>alert("aaaaaaaaaa");</script>';
$action = isset($params['action']) != '' ? $params['action'] : '';
$empCls = new ExamPackage($connString);

switch($action) {
case 'add':
$empCls->insertExamPackage($params);
break;
case 'edit':
$empCls->updateExamPackage($params);
break;
case 'delete':
$empCls->deleteExamPackage($params);
break;
default:
$empCls->getExamPackages($params);
return;
}

class ExamPackage {
protected $conn;
protected $data = array();
function __construct($connString) {
$this->conn = $connString;
}

public function getExamPackages($params) {

$this->data = $this->getRecords($params);

echo json_encode($this->data);
}

function insertExamPackage($params) {
$data = array();;
$sql = "INSERT INTO `tblExamPackages` (test_quantity, price) VALUES('" . $params["test_quantity"] . "', '" . $params["price"] . "'); ";

echo $result = mysqli_query($this->conn, $sql) or die("error to insert package data");

}

function getRecords($params) {
$rp = isset($params['rowCount']) ? $params['rowCount'] : 10;

if (isset($params['current'])) { $page = $params['current']; } else { $page=1; };
$start_from = ($page-1) * $rp;

$sql = $sqlRec = $sqlTot = $where = '';

if( !empty($params['searchPhrase']) ) {
$where .=" WHERE ";
$where .=" (test_quantity LIKE '%".$params['searchPhrase']."%' ";
$where .=" OR price = '".$params['searchPhrase']."' )";
}
if( !empty($params['sort']) ) {
$where .=" ORDER By ".key($params['sort']) .' '.current($params['sort'])." ";
}
// getting total number records without any search
$sql = "SELECT * FROM `tblExamPackages` ";
$sqlTot .= $sql;
$sqlRec .= $sql;

//concatenate search sql if value exist
if(isset($where) && $where != '') {
$sqlTot .= $where;
$sqlRec .= $where;
}
if ($rp!=-1)
$sqlRec .= " LIMIT ". $start_from .",".$rp;


$qtot = mysqli_query($this->conn, $sqlTot) or die("error to fetch tot package data");
$queryRecords = mysqli_query($this->conn, $sqlRec) or die("error to fetch package data");

while( $row = mysqli_fetch_assoc($queryRecords) ) {
$data[] = $row;
}

$json_data = array(
"current" => intval($params['current']),
"rowCount" => 10,
"total" => intval($qtot->num_rows),
"rows" => $data // total data array
);

return $json_data;
}

function updateExamPackage($params) {
$data = array();
//print_R($_POST);die;
$sql = "Update `tblExamPackages` set test_quantity = '" . $params["edit_test_quantity"] . "', price='" . $params["edit_price"]."' WHERE pkg_id='".$_POST["edit_pkg_id"]."'";

echo $result = mysqli_query($this->conn, $sql) or die("error to update package data");
}

function deleteExamPackage($params) {
$data = array();
echo "<script>
var conf = confirm('Delete No.' + $(this).data('row-id') + ' package?');
alert(conf);</script>";

$sql = "delete from `tblExamPackages` WHERE pkg_id'" . $_REQUEST["edit_pkg_id"] . "'";

echo $result = mysqli_query($this->conn, $sql) or die("error to delete package data");
}
}
?>

如果我在这里遗漏了什么,请告诉我。除了删除

之外,一切正常

最佳答案

简短回答:

您的删除查询有语法错误。评论中暗示了这一点......

您还通过尝试在 php 类中使用 JavaScript 来混合服务器端和客户端。这是一个重大错误,需要回顾一下基础知识。

长答案:

我认为您正在尝试转向 OOP 编程,并且您正在做一些正确的事情;值得注意的是,将数据库连接注入(inject)到您的 CRUD 对象中。

但是有些事情可以做得更好。这里有一些想法——

  1. Use PDO而不是 mysqli,并且使用准备好的语句。这很可能会消除查询中的语法错误。
  2. 始终从 Ajax 请求返回 json 编码数据。我个人总是让 php 脚本响应类似 return json_encode( ['message'=>$message, 'data'=>$data] ); 的内容。 。然后,浏览器中的 JavaScript 就可以决定向用户传达什么内容。
  3. 方法应该只做一件事。如果方法变得大于屏幕上适合的大小,您可能需要重构。例如,getRecords()检查页码、创建查询、获取总数并获取所有记录。这可能应该分解为单独的方法,或者更好的是,创建一个可以注入(inject)到查询创建方法中的分页对象。

顺便说一句,为了说明准备好的陈述有多么重要:如果有人去hxxp://yourdomain/exam_package_response.php?action=delete&edit_pkg_id=1+or+1%3D1怎么办? ?

答案:您刚刚丢失了此表中的所有数据。准备好的语句将防止这种情况发生。

关于php - 仅删除选项不起作用 PHP CRUD,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/58380457/

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