PHP somo la 96: Jinsi ya kutengeneza ORM inayofanya CDRUDE operation

Katika somo hili utakwenda Jinsi ya kutengeneza ORM inayofanya CDRUDE operation.

Ufafanuzi wa Code na Structure zake

Katika somo hili, tutajifunza jinsi ya kuandika programu ya CRUD (Create, Read, Update, Delete) kwa kutumia Object-Relational Mapping (ORM) katika PHP. ORM ni njia ya kuwasiliana na database kwa kutumia madarasa na vitu badala ya maandiko ya moja kwa moja ya SQL.

Tunaingiza mafaili mawili muhimu katika programu hii:

Model - Hii ni darasa la ORM linaloshughulikia mawasiliano na database. Inasaidia kutekeleza operesheni za CRUD kama create, all, find, update, na delete kwenye jedwali la database.
index.php - Hii ni script kuu inayoshughulikia maombi kutoka kwa mtumiaji. Inasoma data kutoka kwa fomu na kuihifadhi kwenye database au kuonyesha taarifa kutoka kwa database.

Code Structure

Model Class (model.php):
- Database Connection: Darasa linahusisha uunganisho na database kwa kutumia Database::getInstance()->getConnection().
- CRUD Methods: Kuna njia tano za kufanya operesheni za CRUD:
  - create($data): Inatumika kuingiza data mpya kwenye database.
  - all(): Inarejesha orodha ya taarifa zote kutoka kwenye jedwali.
  - find($id): Inapata taarifa moja kwa kutumia id kama kipengele cha kipekee.
  - update($id, $data): Inasasisha data ya mteja kwa kutumia id.
  - delete($id): Inafuta data ya mteja kwa kutumia id.
Index File (index.php):
- Form Handling: Inasimamia fomu za kuongeza, kusasisha, na kufuta wateja.
- Displaying Data: Inawaonyesha wateja wote waliopo katika database na inatoa chaguo za kuhariri au kufuta.
- Error Handling: Inajali hali ya kosa, kama vile kutokamilika kwa fomu au kushindwa kwa operesheni.

Code Kamili

1. Model Class (`model.php`)

<?php 
class Model {
    protected $db;
    protected $table;

    public function __construct($table) {
        $this->db = Database::getInstance()->getConnection();
        $this->table = $table; // Dynamically set the table name
    }

    public function create($data) {
        // Automatically generate insert query from data
        $columns = implode(", ", array_keys($data));
        $placeholders = implode(", ", array_fill(0, count($data), "?"));
        $stmt = $this->db->prepare("INSERT INTO {$this->table} ($columns) VALUES ($placeholders)");

        // Bind parameters dynamically
        $stmt->bind_param(str_repeat("s", count($data)), ...array_values($data));
        return $stmt->execute();
    }

    public function all() {
        $stmt = $this->db->prepare("SELECT * FROM {$this->table}");
        $stmt->execute();
        return $stmt->get_result()->fetch_all(MYSQLI_ASSOC);
    }

    public function find($id) {
        $stmt = $this->db->prepare("SELECT * FROM {$this->table} WHERE id = ?");
        $stmt->bind_param("i", $id);
        $stmt->execute();
        return $stmt->get_result()->fetch_assoc();
    }

    public function update($id, $data) {
        $setClause = "";
        $types = "s"; // Start with "i" for id (integer)

        // Build the set clause and types string
        foreach ($data as $key => $value) {
            $setClause .= "$key = ?, ";
            $types .= "s"; // Assuming all values in $data are strings
        }
        $setClause = rtrim($setClause, ", ");

        // Prepare the SQL statement
        $stmt = $this->db->prepare("UPDATE {$this->table} SET $setClause WHERE id = ?");

        // Merge the values of $data with the id
        $params = array_merge(array_values($data), [$id]);

        // Bind parameters dynamically with the correct number of type specifiers
        $stmt->bind_param($types, ...$params); // $types now includes "i" for id and "s" for each field in $data

        return $stmt->execute();
    }

    public function delete($id) {
        $stmt = $this->db->prepare("DELETE FROM {$this->table} WHERE id = ?");
        $stmt->bind_param("i", $id);
        return $stmt->execute();
    }
}
?>

2. Index File (`index.php`)

<?php
require_once 'dbclass.php';
require_once "model.php";

// Initialize ORM
$customerORM = new Model('customers');
$error = "";

// Handle form submission for adding a new customer
if ($_SERVER["REQUEST_METHOD"] === "POST" && isset($_POST['action']) && $_POST['action'] === 'create') {
    $name = trim($_POST['name']);
    $email = trim($_POST['email']);

    if (!empty($name) && !empty($email)) {
        $data = [
            'name' => $name,
            'email' => $email
        ];

        if ($customerORM->create($data)) {
            header("Location: index.php");
            exit();
        } else {
            $error = "Failed to add customer.";
        }
    } else {
        $error = "Please fill in all fields.";
    }
}

// Handle form submission for updating a customer
if ($_SERVER["REQUEST_METHOD"] === "POST" && isset($_POST['action']) && $_POST['action'] === 'update') {
    $id = $_POST['id'];
    $name = trim($_POST['name']);
    $email = trim($_POST['email']);

    if (!empty($name) && !empty($email)) {
        $data = [
            'name' => $name,
            'email' => $email
        ];

        if ($customerORM->update($id, $data)) {
            header("Location: index.php");
            exit();
        } else {
            $error = "Failed to update customer.";
        }
    } else {
        $error = "Please fill in all fields.";
    }
}

// Handle delete operation
if (isset($_GET['delete'])) {
    $id = $_GET['delete'];

    if ($customerORM->delete($id)) {
        header("Location: index.php");
        exit();
    } else {
        $error = "Failed to delete customer.";
    }
}

// Fetch all customers
$customers = $customerORM->all();
?>

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Customer List</title>
</head>
<body>

<h2>Customer List</h2>
<?php if (!empty($customers)): ?>
    <table border="1">
        <tr>
            <th>ID</th>
            <th>Name</th>
            <th>Email</th>
            <th>Actions</th>
        </tr>
        <?php foreach ($customers as $customer): ?>
            <tr>
                <td><?= ht">

...

Download App Yetu

Jifunze zaidi, na wasiliana nasi ukiwa na App yetu. Bofya link hapo chini kuweza kuipakua.

Download Now

Zoezi la Maswali

Nyuma Endelea

Umeionaje Makala hii.. ?

Nzuri Mbaya Save

Author: Rajabu

Tarehe: 1970-01-01 03:33:45 Topic: PHP Main: ICT File: Download PDF Views 169

Share On:

Facebook WhatsApp

Sponsored links
👉1 Bongolite - Game zone - Play free game 👉2 kitabu cha Simulizi 👉3 Kitabu cha Afya 👉4 Kitau cha Fiqh 👉5 Simulizi za Hadithi Audio 👉6 Sira ya Mtume Muhammad (s.a.w)

Post zinazofanana:

PHP somo la 52: Aina za access modifire na zinavyotofautiana.

Katika somo hili utakwenda kujifunza kuhusu access modifier ili kuweza kuthibiti nama ya kuzitumia properties kwenye class.

Soma Zaidi...

PHP - somo la 18: Jinsi ya kusoma data kutoka kwenye database kwa kutumia PHP

Katika somo hili utakwenda kujifunza jinsi ya kusoma data kutoka kwenye database kwa kutumia PHP.

Soma Zaidi...

PHP somo la 74: aina za http headerna server variable

Katika somo hii utakwenda kujifunza aina za http header na server variable. Hapa tutakwenda kuchambuwa mgawanyiko wa httpheader na kazi zake.

Soma Zaidi...

PHP BLOG - somo la 11: Jinsi ya kutumia prepared statement

Katika somo hili utajifnza jinsi ya kufanya prepared statement kama njia ya kuzuia sql ingection kwenye PHP blog

Soma Zaidi...

PHP - somo la 62: Project ya CRUDE operation kwa kutumia PHP - OOP na MySQL database

Katika project hii utakwenda kujifunza jinsi ya kufanya CRUDE operation kwa kutumia PHP OOP na MySQL database.

Soma Zaidi...

PHP somol la 55: PHP Abstract Class na abstract method

Katika somo hili utakwenda kujifunza concept mpya ya abstract class na abstract method kwenye OOP.

Soma Zaidi...

PHP BLOG - somo la 6: Jinsi ya kutengeneza dashboard kwa ajili ya blog

katika post hii utajifunza jinsi ya kutengeneza ukurasa wa dashboard kwa ajili ya kutibti post

Soma Zaidi...

PHP - somo la 42: Jinsi ya kufanya encryption na de cryption kwa kutumia PHP

Katika somo hili utakwenda kujifunza jinsi ya kufanya encryption na decryption kwa kutumia PHP. hii itakusaidia kuongeza usalama kwenye taarifa za watu

Soma Zaidi...

PHP somo la 54: PHP OOP class constant

Katika somo hili utakwenda kujifunza jinsi ya kutumia constatnt kwenye class.

Soma Zaidi...

PHP - somo la 26: Jinsi ya kutengeneza system ya ku chat kw akutumia PHP

Katika somo hili utajifunza jinsi ya kutengeneza system ambayo mta atajisajili pamoja na kuchat na watumiaji wengine

Soma Zaidi...

PHP somo la 96: Jinsi ya kutengeneza ORM inayofanya CDRUDE operation

Ufafanuzi wa Code na Structure zake

Code Structure

Code Kamili

1. Model Class (model.php)

2. Index File (index.php)

Download App Yetu

Post zinazofanana:

1. Model Class (`model.php`)

2. Index File (`index.php`)