PHP 8++: l'antisèche

<?php
// my_script.php
?>

<?php
// a comment using "//", you can also use "#"
/*
Handle multiple lines 
with '/' 
and '*'
*/
?>

<?php
echo 'test';
?>

<?php
echo 'test';
?>

<?php
$my_var = 'test';
echo "\t\t\t This is a $my_var \n";
?>

<?php
for ($i = 0; $i < 23; $i++) {
    echo $i;
}
?>

<?php
$letters = ["a", "b", "c",]
foreach ($letters as $letter) {
    echo "$letter \n";
}
?>

<?php
$j = 1;

while($j <= 5) {
  echo "$j \n";
  $j++;
}
?>

<?php
$i = 0;
do {
    echo $i;
} while ($i > 0);
?>

<?php
$a = 110;
$a += 1;
$b = "Hello ";
$b .= "World";
?>

<?php
$a = 111;
$b = &$a; // $b and $a point to the same data, there's no copy
?>

<?php
$arr = [1, 2, 3];
$arr2 = [...$arr, 4, 5, 6];
?>

<?php
$price = 1_1_1;
echo $price; // 111
?>

<?php
if (CONDITION1) {

} elseif (CONDITION2) {

} else {

}
?>

<?php
switch ($n) {
    case 1:
        $r = "You are alone";
        break;
    case 2:
        $r = "It's a double situation.";
        break;
    case 3:
        $r = "It's the third case.";
        break;
    default:
        $r = "I don't know.";
}
echo $r;
?>

<?php
$search = $_GET['search'] ?? 'does not exist or is null';
?>

<?php
echo match ($n) {
  1 => "You are alone",
  2 => "It's a double situation.",
  3 => "It's the third case.",
  default => "I don't know.",
};?>

<?php
$a = (expression1) ? expression2 : expression3;
?>

<?php
$a = (expression1) ?: expression2; // I never use it, but it exists...
// the same as $a = (expression1) ? expression1 : expression2;
?>

<?php
function test() {
    $b = "b"; // local
    global $c;
    $c = "c"; // global
    static $d = 0;
    $d++;// $d increment on each function call
}
?>

<?php
echo <<<EOT
Hello, this is a test
Thank you for your time
EOT;
?>

<?php
$my_var = 'test';
echo <<<EOT
Hello, this is a $my_var
Thank you for your time
EOT;
?>

<?php
echo file_get_contents($file);
?>

<?php
$file = 'file.txt';
$text = "Test write\n";
file_put_contents($file, $text, FILE_APPEND | LOCK_EX);
?>

<?php
$row = 1;
if (($handle = fopen("test.csv", "r")) !== FALSE) {
    while (($data = fgetcsv($handle, 1000, ",")) !== FALSE) {
        $num = count($data);
        echo "<p> $num fields in line $row: <br /></p>\n";
        $row++;
        for ($c=0; $c < $num; $c++) {
            echo $data[$c] . "<br />\n";
        }
    }
    fclose($handle);
}
?>

<?php
try {
    $pdo = new PDO("mysql:host=localhost;dbname=db_username;charset=utf8mb4", "db_username", "db_password");
    $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    if ($pdo) {
	    $statement = $pdo->query("SELECT some_field FROM some_table");
        $row = $statement->fetch(PDO::FETCH_ASSOC);
        echo htmlentities($row['some_field']);
    }
} catch(\PDOException $e) {
   throw new \PDOException($e->getMessage(), (int)$e->getCode());
}
?>

<?php
$q = $pdo->prepare('SELECT name FROM users WHERE id = :id');
$id = filter_input(INPUT_GET, 'id', FILTER_SANITIZE_NUMBER_INT);
$q->bindParam(':id', $id, PDO::PARAM_INT);
$q->execute();
?>

php my_script.php

php -a
Interactive shell

php > echo "hi";
hi
php > 

php -r 'echo "hi";'

php my_script.php "test"

<?php
// my_script.php
print_r($argv[1]);// test
?>

<?php
function say_hello(string $message = 'Hi', string $name) {
    echo "$message $name";
}
say_hello(name: "Zed");
?>

<?php
return $user->getJob()?->getSalary()?->bitcoins;
?>

<?php
function convert(int|float $value): int|float {}
?>

<?php
class Character {
    public function __construct(private string $name) {}
}
?>

<?php
if (str_contains($string, 'target')) {
    // code
}
?>

<?php
enum Colors
{
    case Red;
    case Blue;
    case Green;
}
?>

<?php
$arr1 = ['a' => 1];
$arr2 = ['b' => 2];
$results = ['a' => 0, ...$arr1, ...$arr2];
print_r($results);
?>

<?php
function redirect_uri(string $uri): never {
    header('Location: ' . $uri);
    exit();
}
?>

<?php
function count_and_iterate(Iterator&Countable $value) {
    foreach ($value as $val) {
        echo $val;
    }

    count($value);
}
?>

<?php
$array = ['first', 'second', 'third',];
[, , $c] = $array;
// $c = 'third'
?>

<?php
$y = 111;
$f = fn($x) => $x + $y;
echo $f(222);// 333
?>

<?php
$err = fn () => throw new CustomErrors();
?>

<?php
$my_class = new MyClass();
var_dump($my_class::class);// instead of using get_class()
?>

<?php
public static function(
    string $name,
    int $number,
) {
    // code
}
?>

<?php
function console_log( $data ){
  echo '<script>';
  echo 'console.log('. json_encode( $data ) .')';
  echo '</script>';
}
?>