5个PHP开发技能点，游刃有余面试成功

<?php
$name = "John";
$age = 25;

if($age >= 18){
    echo "My name is ".$name." and I am an adult.";
}else{
    echo "My name is ".$name." and I am a teenager.";
}

for($i = 1; $i <= 10; $i++){
    echo $i." ";
}
?>

<?php
class Person{
    public $name;
    public $age;
    
    public function __construct($name, $age){
        $this->name = $name;
        $this->age = $age;
    }
    
    public function introduce(){
        echo "My name is ".$this->name." and I am ".$this->age." years old.";
    }
}

$person = new Person("John", 25);
$person->introduce();
?>

<?php
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "mydatabase";

$conn = new mysqli($servername, $username, $password, $dbname);

if($conn->connect_error){
    die("Connection failed: ".$conn->connect_error);
}

$sql = "SELECT * FROM users";
$result = $conn->query($sql);

if($result->num_rows > 0){
    while($row = $result->fetch_assoc()){
        echo "Name: ".$row["name"].", Age: ".$row["age"]."<br>";
    } 
}else{
    echo "No results found.";
}

$sql = "INSERT INTO users (name, age) VALUES ('John', 25)";
if($conn->query($sql) === TRUE){
    echo "New record created successfully.";
}else{
    echo "Error: ".$conn->error;
}

$conn->close();
?>

// routes/web.php
Route::get('/hello', 'HelloController@index');

//app/Http/Controllers/HelloController.php
namespace AppHttpControllers;

use IlluminateHttpRequest;

class HelloController extends Controller
{
    public function index()
    {
        return "Hello, World!";
    }
}

<?php
$name = "John";
$age = 25;

xdebug_break();

echo "My name is ".$name." and I am ".$age." years old.";
?>