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

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 143

Share On:

Facebook WhatsApp

Sponsored links
👉1 Kitau cha Fiqh 👉2 kitabu cha Simulizi 👉3 Madrasa kiganjani 👉4 Simulizi za Hadithi Audio 👉5 Kitabu cha Afya 👉6 Sira ya Mtume Muhammad (s.a.w)

Post zinazofanana:

PHP - somo la 20 : Jinsi ya kufuta na ku update data kwenye database kwa kutumia PHP

Katika somo hili utakwenda kujifunza jinsi ya ku update na kufuta data kwenye database kwa kutumia PHP

Soma Zaidi...

PHP somo la 72: Jinsi ya kuandaa PDF kutoana na data zilizopo kwenye database

hapa utawenda utuma database wa ajl ya utengeneza maudhu ya PDF.

Soma Zaidi...

PHP somo la 66: Jinsi ya ku edit data na kufuta kwenye database kwa kutumia PDO

Katika somo hili utakwenda kujifunza jinsi jinsi ya ku edit ama ku update data na kuzifuta kwenye database kwa kutumia PDO

Soma Zaidi...

PHP BLOG - somo la 12: Jinsi ya kutumia prepared statement kwenye kusoma post za blog

Katika somo hili tutakwenda kutumia prepared ststement kwenye ku fetch data kutoka kwenye database.

Soma Zaidi...

PHP - somo la 11: Jinsi ya kutuma tarifa zilizojazwa kwenye form

Katika somo hili utakwenda kujifunza jinsi ya kukusanya taarifa za watumiaji kwa kutumia html form.

Soma Zaidi...

PHP somo la 85: Jinsi ya utengeneza json data kwa utumia php

Katika somo hili utakwenda kujifunza Jinsi ya utengeneza json data kwa utumia php

Soma Zaidi...

PHP somola 69: jinsi ya kutuma email kwa watu zaidi ya mmoja kwa kutumia PHPMailer

Katika somo il utajifunza kutuma email kwa watu wengi kwa kutumia PHPMailer. Pia utajifunza jinsi ya kuweka Carbon Copy na Blind Carbon Copy

Soma Zaidi...

PHP - somo la 24: Jinsi ya ku upload file kwenye database na kulisoma kw akutumia php

Katika somo hili utajifnza jinsi ya ku upload file kwenye database. Kisha utajifunza jinsi ya kulisoma faili hilo kwa kutumia php

Soma Zaidi...

PHP somo la 91: Mambo ya kuzingatia unapokuwa unashughulika na data za json

Haya ni mabo ya kuzingatia unapo encode ama ku decode data za json

Soma Zaidi...

PHP somo la 92: Jinsi ya kuunganisha php na database ya sqlite

Katika somo hili utakwenda kujifunza jinsi ya kutumia database ya sqlite kwa kutumia PHP.

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`)