PHP

「CRUD」のサンプル(レガシー)

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参照

PHPとMySQLのツボとコツが絶対にわかる本


DB

http://bit.ly/1iPFFeV


サンプル


db.php


<?php
class DB{
private $USER = "root";
private $PW = "******";
private $dns = "mysql:dbname=salesmanagement;host=localhost;charset=utf8";

private function Connectdb(){
try{
$pdo = new PDO($this->dns,$this->USER,$this->PW);
return $pdo;
}catch(Exception $e){
return false;
}
}

public function executeSQL($sql,$array){
try{
if(!$pdo = $this->Connectdb())return false;
$stmt = $pdo->prepare($sql);
$stmt->execute($array);
return $stmt;
}catch(Exception $e){
return false;
}
}
}
?>



dbcrud.php


<?php
require_once('db.php');
class dbcrud extends DB{
//goodsテーブルのCRUD担当
public function SelectGoodsAll(){
$sql = "SELECT * FROM goods";
$res = parent::executeSQL($sql, null);
$data = "<table class='recordlist' id='goodsTable'>";
$data .= "<tr><th>カラム1</th><th>カラム2</th><th>カラム3</th><th></th><th></th></tr>\n";
foreach($rows = $res->fetchAll(PDO::FETCH_NUM) as $row){
$data .= "<tr>";
for($i=0;$i<count($row);$i++){
$data .= "<td>{$row[$i]}</td>";
}
//更新ボタンのコード
$data .= <<<eof
<td><form method='post' action=''>
<input type='hidden' name='id' value='{$row[0]}'>
<input type='submit' name='update' value='更新'>
</form></td>
eof;
//削除ボタンのコード
$data .= <<<eof
<td><form method='post' action=''>
<input type='hidden' name='id' id='Deleteid' value='{$row[0]}'>
<input type='submit' name='delete' id='delete' value='削除'
onClick='return CheckDelete()'>
</form></td>
eof;
$data .= "</tr>\n";
}
$data .= "</table>\n";
return $data;
}

public function InsertGoods(){
$sql = "INSERT INTO goods VALUES(?,?,?)";
$array = array($_POST['GoodsID'],$_POST['GoodsName'],$_POST['Price']);
parent::executeSQL($sql, $array);
}

public function UpdateGoods(){
$sql = "UPDATE goods SET GoodsName=?, Price=? WHERE GoodsID=?";
//array関数の引数の順番に注意する
$array = array($_POST['GoodsName'],$_POST['Price'],$_POST['GoodsID']);
parent::executeSQL($sql, $array);
}

public function GoodsNameForUpdate($GoodsID){
return $this->FieldValueForUpdate($GoodsID, "GoodsName");
}

public function PriceForUpdate($GoodsID){
return $this->FieldValueForUpdate($GoodsID, "Price");
}

private function FieldValueForUpdate($GoodsID, $field){
//private関数 上の2つの関数で使用している
$sql = "SELECT {$field} FROM goods WHERE GoodsID=?";
$array = array($GoodsID);
$res = parent::executeSQL($sql, $array);
$rows = $res->fetch(PDO::FETCH_NUM);
return $rows[0];
}
public function DeleteGoods($GoodsID){
$sql = "DELETE FROM goods WHERE GoodsID=?";
$array = array($GoodsID);
parent::executeSQL($sql, $array);
}
}
?>



index.php

<?php

require_once('dbcrud.php');
//変数の初期値入力

$dbGoodsId = '更新のIDが表示されます';
$dbGoodsName = '更新の値が表示されます';
$Price = '更新の値が表示されます';

$dbGoods = new dbcrud();
//更新処理
if(isset($_POST['submitUpdate'])){
$dbGoods->UpdateGoods();
}
//更新用フォーム要素の表示
if(isset($_POST['update'])){
//更新対象の値を取得
$dbGoodsId = $_POST['id'];
$dbGoodsName = $dbGoods->GoodsNameForUpdate($_POST['id']);
$Price = $dbGoods->PriceForUpdate($_POST['id']);
}
//削除処理
if(isset($_POST['delete'])){
$dbGoods->DeleteGoods($_POST['id']);
}
//新規登録処理
if(isset($_POST['submitEntry'])){
$dbGoods->InsertGoods();
}
//テーブルデータの一覧表示
$data = $dbGoods->SelectGoodsAll();
?>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>title</title>
<script type="text/javascript">
function CheckDelete(){
return confirm("削除してもよろしいですか?");
}
</script>
</head>
<body>
<h1>CRUD</h1>
<h3>新規登録</h3>
<form action="" method="post">
<label>カラム1<input type='text' name='GoodsID' size="30" required></label>
<label>カラム2<input type='text' name='GoodsName' size="30" required></label>
<label>カラム3<input type='text' name='Price' size="30" required></label>
<input type='submit' name='submitEntry' value='  新規登録  '>
</form>

<div>
<?php echo $data;?>
</div>

<h2>update</h2>

<form action="" method="post">
<p>GoodsID: <?php echo $dbGoodsId;?></p>
<input type="hidden" name="GoodsID" value="<?php echo $dbGoodsId;?>" />
<label>カラム2:<input type='text' name='GoodsName'
size="30" value="<?php echo $dbGoodsName;?>" required></label>
<label>カラム3:<input type='text' name='Price'
size="30" value="<?php echo $Price;?>" required></label>
<input type='submit' name='submitUpdate' value='  更新  '>
</form>

</body>
</html>