Удаление информации в приложении
В этом уроке мы закончим написание нашего веб приложения. Осталось реализовать функцию удаления информации в нашем приложении.
Подход к созданию данного функционала будет похож на уже реализованную нами функцию редактирования данных. При удалении нам не понадобится никакая форма, и изменится запрос на удаление информации из СУБД MySQL.
Код урока (players.php)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Игроки</title>
<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
</head>
<body>
<header>
<nav class="navbar navbar-default" role="navigation">
<div class="container-fluid">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-ex1-collapse">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">Sport CRM</a>
</div>
<div class="collapse navbar-collapse navbar-ex1-collapse">
<ul class="nav navbar-nav">
<li><a href="index.php">Главная</a></li>
<li><a href="players.php">Игроки</a></li>
<li><a href="teams.php">Команды</a></li>
<li><a href="countries.php">Страны</a></li>
</ul>
</div>
</div>
</nav>
</header>
<div id="content">
<div class="container-fluid">
<?php include 'db.php'; ?>
<?php include 'api.php'; ?>
<?php
$players = getAllPlayers($db);
?>
<table class="table table-bordered">
<tr>
<th>Игрок</th>
<th>Команда</th>
<th>Страна</th>
<th>Удалить</th>
</tr>
<?php foreach ($players as $player) { ?>
<tr>
<td><a href="edit.php?player_id=<?php echo $player['player_id'];?>"><?php echo $player['player_name']; ?></a></td>
<td><?php echo $player['team_name']; ?></td>
<td><?php echo $player['country_name']; ?></td>
<td><a class="btn btn-danger" href="delete.php?player_id=<?php echo $player['player_id'];?>">Удалить</a></td>
</tr>
<?php } ?>
</table>
<button id="addButton" class="btn btn-default">Добавить игрока</button>
<form action="" method="POST" role="form" style="display: none; margin-top: 20px;">
<div class="form-group">
<label for="">Введите имя</label>
<input type="text" class="form-control" id="name" name="name" placeholder="Введите имя">
</div>
<div class="form-group">
<select name="country" class="form-control" id="country">
<?php
$countries = getAllCountries($db);
foreach ($countries as $key => $value) {
echo "<option value=".$value['country_id'].">".$value['country_name']."</option>";
}
?>
</select>
</div>
<button type="submit" class="btn btn-default">Добавить</button>
</form>
</div>
<?php
if(isset($_POST['name']) && $_POST['name'] != '') {
$name = $_POST['name'];
$countryId = $_POST['country'];
addPlayer($db, $name, $countryId);
}
?>
</div>
<footer>
</footer>
<script>
$("#addButton").click(function(){
$("form").slideDown();
});
</script>
</body>
</html>Код урока (delete.php)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Игроки</title>
<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
</head>
<body>
<header>
<nav class="navbar navbar-default" role="navigation">
<div class="container-fluid">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-ex1-collapse">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">Sport CRM</a>
</div>
<div class="collapse navbar-collapse navbar-ex1-collapse">
<ul class="nav navbar-nav">
<li><a href="index.php">Главная</a></li>
<li><a href="players.php">Игроки</a></li>
<li><a href="teams.php">Команды</a></li>
<li><a href="countries.php">Страны</a></li>
</ul>
</div>
</div>
</nav>
</header>
<div id="content">
<div class="container-fluid">
<?php include 'db.php'; ?>
<?php include 'api.php'; ?>
<?php
$id = $_GET['player_id'];
if($id) {
deletePlayer($db, $id);
} else {
echo "<h1>Error</h1>";
exit();
}
?>
</div>
</div>
<footer>
</footer>
</body>
</html>Код урока (api.php)
function getAllPlayers($db) {
$sql = "SELECT * FROM players
LEFT JOIN teams ON players.team_id = teams.team_id
LEFT JOIN countries ON players.country_id = countries.country_id;
";
$result = array();
$stmt = $db->prepare($sql);
$stmt->execute();
while($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
$result[$row['player_id']] = $row;
}
return $result;
}
function getAllTeams($db) {
$sql = "SELECT * FROM teams
INNER JOIN countries ON teams.country_id = countries.country_id;
";
$result = array();
$stmt = $db->prepare($sql);
$stmt->execute();
while($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
$result[$row['team_id']] = $row;
}
return $result;
}
function getPlayerById($db, $id) {
$sql = "SELECT * FROM players
WHERE player_id = :player_id
";
$stmt = $db->prepare($sql);
$stmt->bindValue('player_id', $id, PDO::PARAM_INT);
$stmt->execute();
$row = $stmt->fetch(PDO::FETCH_ASSOC);
return $row;
}
function savePlayer($db, $name, $id) {
$sql = " UPDATE players
SET player_name = :player_name
WHERE player_id = :player_id
";
$stmt = $db->prepare($sql);
$stmt->bindValue(':player_name', $name, PDO::PARAM_STR);
$stmt->bindValue(':player_id', $id, PDO::PARAM_INT);
$stmt->execute();
}
function getAllCountries($db) {
$sql = "SELECT * FROM countries";
$res = array();
$stmt = $db->prepare($sql);
$stmt->execute();
while($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
$res[$row['country_id']] = $row;
}
return $res;
}
function addPlayer($db, $playerName, $countryId) {
$sql = "INSERT INTO players(player_name, country_id)
VALUES(:player_name, :country_id)
";
$stmt = $db->prepare($sql);
$stmt->bindValue(':player_name', $playerName, PDO::PARAM_STR);
$stmt->bindValue(':country_id', $countryId, PDO::PARAM_INT);
$stmt->execute();
}
function deletePlayer($db, $id) {
$sql = "DELETE FROM players WHERE player_id = :player_id";
$stmt = $db->prepare($sql);
$stmt->bindValue(":player_id", $id, PDO::PARAM_INT);
$stmt->execute();
}
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