代码片段仓库

<?php
function convertTimezone($date, $fromZone, $toZone) {
    $date = new DateTime($date, new DateTimeZone($fromZone));
    $date->setTimeZone(new DateTimeZone($toZone));
    return $date->format('Y-m-d H:i:s');
}

<?php
class BSTree {
    private $root = null;

    public function insert($value) {
        $newNode = new BSNode($value);
        if ($this->root === null) {
            $this->root = $newNode;
            return;
        }
        $this->_insertNode($this->root, $newNode);
    }

    private function _insertNode(&$parent, &$node) {
        if ($parent === null) {
            $parent = $node;
        } elseif ($node->value < $parent->value) {
            if ($parent->left === null) {
                $parent->left = $node;
            } else {
                $this->_insertNode($parent->left, $node);
            }
        } else {
            if ($parent->right === null) {
                $parent->right = $node;
            } else {
                $this->_insertNode($parent->right, $node);
            }
        }
    }
}

class BSNode {
    public $value;
    public $left = null;
    public $right = null;

    public function __construct($value) {
        $this->value = $value;
    }
}

// 用户登录验证
function loginUser($username, $password) {
    $user = getUserByUsername($username);
    
    if ($user && password_verify($password, $user['password'])) {
        $_SESSION['user_id'] = $user['id'];
        return true;
    }
    return false;
}

<?php
$host = "127.0.0.1";
$dbname = "my_database";
$username = "db_user";
$password = "secure_password";

try {
    $conn = new PDO("mysql:host=$host;dbname=$dbname", $username, $password);
    $conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
    echo "Connected successfully";
} catch(PDOException $e) {
    echo "Connection failed: " . $e->getMessage();
}
?>

function getCurrentDateTime() {
    const now = new Date();
    const year = now.getFullYear();
    const month = String(now.getMonth() + 1).padStart(2, "0");
    const day = String(now.getDate()).padStart(2, "0");
    const hours = String(now.getHours()).padStart(2, "0");
    const minutes = String(now.getMinutes()).padStart(2, "0");
    
    return `${year}-${month}-${day} ${hours}:${minutes}`;
}

console.log(getCurrentDateTime());