base_app/update.php at master · TINF-IFSP-RioPreto/base_app · GitHub

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<?php
// Initialize the session
session_start();

// Check if the user is logged in, if not then redirect him to login page
if(!isset($_SESSION["loggedin"]) || $_SESSION["loggedin"] !== true){
    header("location: login.php");
    exit;
}
// Include config file
require_once "config.php";

// Define variables and initialize with empty values
$name = $address = $salary = "";
$name_err = $address_err = $salary_err = "";

// Processing form data when form is submitted
if (isset($_POST["id"]) && !empty($_POST["id"])) {
    // Get hidden input value
    $id = $_POST["id"];

    // Validate name
    $input_name = trim($_POST["name"]);
    if (empty($input_name)) {
        $name_err = "Please enter a name.";
    } elseif (!preg_match("/^[a-zA-Z\s]+$/", $input_name)) {
        $name_err = "Please enter a valid name.";
    } else {
        $name = $input_name;
    }

    // Validate address
    $input_address = trim($_POST["address"]);
    if (empty($input_address)) {
        $address_err = "Please enter an address.";
    } else {
        $address = $input_address;
    }

    // Validate salary
    $input_salary = trim($_POST["salary"]);
    if (empty($input_salary)) {
        $salary_err = "Please enter the salary amount.";
    } elseif (!ctype_digit($input_salary)) {
        $salary_err = "Please enter a positive integer value.";
    } else {
        $salary = $input_salary;
    }

    // Check input errors before updating the database
    if (empty($name_err) && empty($address_err) && empty($salary_err)) {
        // Prepare an update statement
        $sql = "UPDATE employees SET name = :name, address = :address, salary = :salary WHERE id = :id";

        if ($stmt = $link->prepare($sql)) {
            // Bind variables to the prepared statement as parameters
            $stmt->bindValue(':name', $name, SQLITE3_TEXT);
            $stmt->bindValue(':address', $address, SQLITE3_TEXT);
            $stmt->bindValue(':salary', $salary, SQLITE3_INTEGER);
            $stmt->bindValue(':id', $id, SQLITE3_INTEGER);

            // Attempt to execute the prepared statement
            if ($stmt->execute()) {
                // Records updated successfully. Redirect to landing page
                header("location: index.php");
                exit();
            } else {
                echo "Oops! Something went wrong. Please try again later.";
            }
        }

        // Close statement
        $stmt->close();
    }

    // Close connection
    $link->close();
} else {
    // Check existence of id parameter before processing further
    if (isset($_GET["id"]) && !empty(trim($_GET["id"]))) {
        // Get URL parameter
        $id = trim($_GET["id"]);

        // Prepare a select statement
        $sql = "SELECT * FROM employees WHERE id = :id";
        if ($stmt = $link->prepare($sql)) {
            // Bind variables to the prepared statement as parameters
            $stmt->bindValue(':id', $id, SQLITE3_INTEGER);

            // Attempt to execute the prepared statement
            $result = $stmt->execute();

            if ($row = $result->fetchArray(SQLITE3_ASSOC)) {
                // Retrieve individual field values
                $name = $row["name"];
                $address = $row["address"];
                $salary = $row["salary"];
            } else {
                // URL doesn't contain a valid id. Redirect to error page
                header("location: error.php");
                exit();
            }
        } else {
            echo "Oops! Something went wrong. Please try again later.";
        }

        // Close statement
        $stmt->close();

        // Close connection
        $link->close();
    } else {
        // URL doesn't contain id parameter. Redirect to error page
        header("location: error.php");
        exit();
    }
}
?>

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Update Record</title>
    <link rel="stylesheet" href="css/bootstrap.min.css">
    <style>
        .wrapper{
            width: 600px;
            margin: 0 auto;
        }
    </style>
</head>
<body>
<div class="wrapper">
    <div class="container-fluid">
        <div class="row">
            <div class="col-md-12">
                <h2 class="mt-5">Update Record</h2>
                <p>Please edit the input values and submit to update the employee record.</p>
                <form action="<?php echo htmlspecialchars(basename($_SERVER['REQUEST_URI'])); ?>" method="post">
                    <div class="form-group">
                        <label>Name</label>
                        <input type="text" name="name" class="form-control <?php echo (!empty($name_err)) ? 'is-invalid' : ''; ?>" value="<?php echo $name; ?>">
                        <span class="invalid-feedback"><?php echo $name_err;?></span>
                    </div>
                    <div class="form-group">
                        <label>Address</label>
                        <textarea name="address" class="form-control <?php echo (!empty($address_err)) ? 'is-invalid' : ''; ?>"><?php echo $address; ?></textarea>
                        <span class="invalid-feedback"><?php echo $address_err;?></span>
                    </div>
                    <div class="form-group">
                        <label>Salary</label>
                        <input type="text" name="salary" class="form-control <?php echo (!empty($salary_err)) ? 'is-invalid' : ''; ?>" value="<?php echo $salary; ?>">
                        <span class="invalid-feedback"><?php echo $salary_err;?></span>
                    </div>
                    <input type="hidden" name="id" value="<?php echo $id; ?>"/>
                    <input type="submit" class="btn btn-primary" value="Submit">
                    <a href="index.php" class="btn btn-secondary ml-2">Cancel</a>
                </form>
            </div>
        </div>
    </div>
</div>
</body>
</html>