自用PHP版密码生成器源码分享

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无聊写了一个用来生成密码，省的自己动脑筋了

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<?php
// 开启会话用于CSRF保护
session_start();

// --- 核心功能：安全地生成密码 ---
function generate_secure_password(int $length, bool $include_uppercase, bool $include_lowercase, bool $include_numbers, bool $include_symbols): string {
    $lowercase_chars = 'abcdefghijklmnopqrstuvwxyz';
    $uppercase_chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
    $number_chars = '0123456789';
    $symbol_chars = '!@#$%^&*()-_=+[]{}|;:,.<>?';

    $char_pool = '';
    $password = '';

    if ($include_lowercase) {
        $char_pool .= $lowercase_chars;
        $password .= $lowercase_chars[random_int(0, strlen($lowercase_chars) - 1)];
    }
    if ($include_uppercase) {
        $char_pool .= $uppercase_chars;
        $password .= $uppercase_chars[random_int(0, strlen($uppercase_chars) - 1)];
    }
    if ($include_numbers) {
        $char_pool .= $number_chars;
        $password .= $number_chars[random_int(0, strlen($number_chars) - 1)];
    }
    if ($include_symbols) {
        $char_pool .= $symbol_chars;
        $password .= $symbol_chars[random_int(0, strlen($symbol_chars) - 1)];
    }

    if (empty($char_pool)) {
        return '错误：请至少选择一种字符类型。';
    }

    $remaining_length = $length - strlen($password);
    
    if ($remaining_length > 0) {
        $pool_length = strlen($char_pool) - 1;
        for ($i = 0; $i < $remaining_length; $i++) {
            $password .= $char_pool[random_int(0, $pool_length)];
        }
    }
    
    return str_shuffle($password);
}

// 生成并存储CSRF令牌
if (empty($_SESSION['csrf_token'])) {
    $_SESSION['csrf_token'] = bin2hex(random_bytes(32));
}
$csrf_token = $_SESSION['csrf_token'];

// --- 页面逻辑：处理用户输入和显示 ---
$generated_password = '';
$options = [
    'length' => $_POST['length'] ?? 16,
    'lowercase' => isset($_POST['form_submitted']) ? isset($_POST['lowercase']) : true,
    'uppercase' => isset($_POST['form_submitted']) ? isset($_POST['uppercase']) : true,
    'numbers' => isset($_POST['form_submitted']) ? isset($_POST['numbers']) : true,
    'symbols' => isset($_POST['form_submitted']) ? isset($_POST['symbols']) : true,
];

// 验证用户输入的函数
function validate_input(array $data): array {
    $errors = [];

    // 验证密码长度
    $length = filter_var($data['length'] ?? 16, FILTER_VALIDATE_INT, [
        'options' => [
            'min_range' => 8,
            'max_range' => 50
        ]
    ]);
    if ($length === false) {
        $errors[] = '密码长度必须在8-50之间';
    }

    // 验证布尔值参数
    $types = ['lowercase', 'uppercase', 'numbers', 'symbols'];
    foreach ($types as $type) {
        if (isset($data[$type])) {
            $value = filter_var($data[$type], FILTER_VALIDATE_BOOLEAN, FILTER_NULL_ON_FAILURE);
            if ($value === null) {
                $errors[] = "无效的字符类型参数: $type";
            }
        }
    }

    // 验证CSRF令牌
    if (empty($data['csrf_token']) || !hash_equals($_SESSION['csrf_token'], $data['csrf_token'])) {
        $errors[] = 'CSRF验证失败';
    }

    return $errors;
}

// 处理表单提交
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $input_errors = validate_input($_POST);
    
    // 检查是否有AJAX请求头
    $is_ajax = isset($_SERVER['HTTP_X_REQUESTED_WITH']) && 
               strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) === 'xmlhttprequest';
    
    if (!empty($input_errors)) {
        $error_message = implode('<br>', $input_errors);
        $generated_password = '错误: ' . $error_message;
        
        if ($is_ajax) {
            header('Content-Type: application/json');
            echo json_encode(['password' => $generated_password]);
            exit;
        }
    } else {
        if ($is_ajax) {
            $generated_password = generate_secure_password(
                (int)($_POST['length'] ?? 16),
                (bool)($_POST['uppercase'] ?? false),
                (bool)($_POST['lowercase'] ?? false),
                (bool)($_POST['numbers'] ?? false),
                (bool)($_POST['symbols'] ?? false)
            );
            
            header('Content-Type: application/json');
            echo json_encode(['password' => $generated_password]);
            exit;
        } else {
            $generated_password = generate_secure_password(
                (int)$options['length'],
                (bool)$options['uppercase'],
                (bool)$options['lowercase'],
                (bool)$options['numbers'],
                (bool)$options['symbols']
            );
        }
    }
}
?>
<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>安全密码生成器</title>
    <style>
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        }
        
        body {
            background-color: #f8f9fa;
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: 100vh;
            padding: 20px;
            color: #333;
        }
        
        .container {
            width: 100%;
            max-width: 480px;
            background: white;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
            overflow: hidden;
            padding: 30px;
        }
        
        .header {
            text-align: center;
            margin-bottom: 25px;
            padding-bottom: 20px;
            border-bottom: 1px solid #eaeaea;
        }
        
        .header h1 {
            font-size: 28px;
            color: #2c3e50;
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }
        
        .header p {
            color: #7f8c8d;
            font-size: 16px;
            margin-top: 5px;
        }
        
        .password-display {
            margin-bottom: 25px;
            position: relative;
        }
        
        #result {
            width: 100%;
            padding: 14px 16px;
            border: 1px solid #e1e5e9;
            border-radius: 8px;
            font-size: 18px;
            background: #fcfcfc;
            word-break: break-all;
            height: 80px;
            resize: none;
            overflow-y: auto;
        }
        
        #result:focus {
            outline: none;
            border-color: #3498db;
            box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.1);
        }
        
        .password-actions {
            display: flex;
            gap: 10px;
            margin-top: 15px;
        }
        
        .btn {
            flex: 1;
            padding: 12px 15px;
            border-radius: 8px;
            font-weight: 500;
            font-size: 16px;
            cursor: pointer;
            transition: all 0.2s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border: none;
        }
        
        .btn-copy {
            background-color: #27ae60;
            color: white;
        }
        
        .btn-copy:hover {
            background-color: #219653;
        }
        
        .btn-generate {
            background-color: #3498db;
            color: white;
        }
        
        .btn-generate:hover {
            background-color: #2980b9;
        }
        
        .options-section {
            margin-top: 30px;
        }
        
        .options-title {
            font-size: 18px;
            font-weight: 500;
            margin-bottom: 18px;
            color: #2c3e50;
        }
        
        .option-group {
            background: #f9fafb;
            border-radius: 10px;
            padding: 20px;
        }
        
        .form-group {
            margin-bottom: 18px;
        }
        
        .form-group:last-child {
            margin-bottom: 0;
        }
        
        .form-group label {
            display: block;
            font-weight: 500;
            margin-bottom: 8px;
            font-size: 15px;
        }
        
        .form-control {
            width: 100%;
            padding: 10px 14px;
            border: 1px solid #e1e5e9;
            border-radius: 8px;
            font-size: 16px;
        }
        
        .form-control:focus {
            outline: none;
            border-color: #3498db;
            box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.1);
        }
        
        .switch-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: white;
            border: 1px solid #e1e5e9;
            border-radius: 8px;
            padding: 14px;
            margin-bottom: 12px;
        }
        
        .switch-container label {
            font-size: 15px;
            cursor: pointer;
        }
        
        .switch {
            position: relative;
            display: inline-block;
            width: 50px;
            height: 26px;
        }
        
        .switch input {
            opacity: 0;
            width: 0;
            height: 0;
        }
        
        .slider {
            position: absolute;
            cursor: pointer;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: #ccc;
            transition: .4s;
            border-radius: 26px;
        }
        
        .slider:before {
            position: absolute;
            content: "";
            height: 20px;
            width: 20px;
            left: 3px;
            bottom: 3px;
            background-color: white;
            transition: .4s;
            border-radius: 50%;
        }
        
        input:checked + .slider {
            background-color: #3498db;
        }
        
        input:checked + .slider:before {
            transform: translateX(24px);
        }
        
        .length-control {
            display: flex;
            gap: 10px;
            align-items: center;
        }
        
        .btn-decrement, .btn-increment {
            width: 40px;
            height: 40px;
            background: #f1f5f9;
            border: 1px solid #e1e5e9;
            border-radius: 8px;
            font-size: 20px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        
        .btn-decrement:hover, .btn-increment:hover {
            background: #e8ebee;
        }
        
        .length-input {
            width: 80px;
            text-align: center;
            font-weight: 500;
        }
        
        .strength-meter {
            margin-top: 20px;
            background: #f1f5f9;
            border-radius: 8px;
            padding: 12px 15px;
            display: flex;
            align-items: center;
        }
        
        .strength-label {
            font-size: 14px;
            font-weight: 500;
        }
        
        .indicator {
            flex-grow: 1;
            height: 6px;
            background: #e0e0e0;
            border-radius: 10px;
            overflow: hidden;
            margin: 0 12px;
        }
        
        .progress {
            height: 100%;
            background: #e74c3c;
            border-radius: 10px;
            transition: width 0.4s ease;
        }
        
        .strength-text {
            font-size: 13px;
            font-weight: 500;
        }
        
        @media (max-width: 500px) {
            .container {
                padding: 20px;
            }
            
            .header h1 {
                font-size: 24px;
            }
            
            .password-actions {
                flex-direction: column;
            }
        }
    </style>
</head>
<body>
    <div class="container">
        <div class="header">
            <h1>🔐🔐 安全密码生成器</h1>
            <p>快速创建高强度随机密码</p>
        </div>
        
        <div class="password-display">
            <textarea id="result" rows="3" readonly placeholder="点击生成按钮创建密码"><?php echo htmlspecialchars($generated_password, ENT_QUOTES, 'UTF-8'); ?></textarea>
            
            <div class="password-actions">
                <button class="btn btn-copy" id="copyBtn">
                    <svg width="18" height="18" viewBox="0 0 24 24">
                        <path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"/>
                    </svg>
                    复制密码
                </button>
                <button class="btn btn-generate" id="generateBtn">
                    <svg width="18" height="18" viewBox="0 0 24 24">
                        <path fill="currentColor" d="M17.65,6.35C16.2,4.9 14.21,4 12,4A8,8 0 0,0 4,12A8,8 0 0,0 12,20C15.73,20 18.84,17.45 19.73,14H17.65C16.83,16.33 14.61,18 12,18A6,6 0 0,1 6,12A6,6 0 0,1 12,6C13.66,6 15.14,6.69 16.22,7.78L13,11H20V4L17.65,6.35Z"/>
                    </svg>
                    重新生成
                </button>
            </div>
        </div>
        
        <div class="options-section">
            <h2 class="options-title">自定义选项</h2>
            
            <form id="passwordForm" method="post">
                <input type="hidden" name="form_submitted" value="1">
                <!-- 添加CSRF令牌 -->
                <input type="hidden" name="csrf_token" value="<?php echo htmlspecialchars($csrf_token, ENT_QUOTES, 'UTF-8'); ?>">
                
                <div class="option-group">
                    <div class="form-group">
                        <label for="length">密码长度</label>
                        <div class="length-control">
                            <button class="btn-decrement" type="button" id="decrement">-</button>
                            <input type="number" id="length" name="length" class="form-control length-input" min="8" max="50" value="<?php echo htmlspecialchars($options['length'], ENT_QUOTES, 'UTF-8'); ?>">
                            <button class="btn-increment" type="button" id="increment">+</button>
                        </div>
                    </div>
                    
                    <div class="switch-container">
                        <label for="lowercase">小写字母 (a-z)</label>
                        <label class="switch">
                            <input type="checkbox" name="lowercase" id="lowercase" <?php if ($options['lowercase']) echo 'checked'; ?>>
                            <span class="slider"></span>
                        </label>
                    </div>
                    
                    <div class="switch-container">
                        <label for="uppercase">大写字母 (A-Z)</label>
                        <label class="switch">
                            <input type="checkbox" name="uppercase" id="uppercase" <?php if ($options['uppercase']) echo 'checked'; ?>>
                            <span class="slider"></span>
                        </label>
                    </div>
                    
                    <div class="switch-container">
                        <label for="numbers">数字 (0-9)</label>
                        <label class="switch">
                            <input type="checkbox" name="numbers" id="numbers" <?php if ($options['numbers']) echo 'checked'; ?>>
                            <span class="slider"></span>
                        </label>
                    </div>
                    
                    <div class="switch-container">
                        <label for="symbols">特殊符号 (!@#...)</label>
                        <label class="switch">
                            <input type="checkbox" name="symbols" id="symbols" <?php if ($options['symbols']) echo 'checked'; ?>>
                            <span class="slider"></span>
                        </label>
                    </div>
                </div>
                
                <div class="strength-meter">
                    <span class="strength-label">密码强度:</span>
                    <div class="indicator">
                        <div class="progress" id="strengthIndicator"></div>
                    </div>
                    <span class="strength-text" id="strengthText">-</span>
                </div>
            </form>
        </div>
    </div>

    <script>
        // 获取DOM元素
        const passwordForm = document.getElementById('passwordForm');
        const resultTextarea = document.getElementById('result');
        const copyBtn = document.getElementById('copyBtn');
        const generateBtn = document.getElementById('generateBtn');
        const lengthInput = document.getElementById('length');
        const decrementBtn = document.getElementById('decrement');
        const incrementBtn = document.getElementById('increment');
        const strengthIndicator = document.getElementById('strengthIndicator');
        const strengthText = document.getElementById('strengthText');
        
        // 复制密码
        copyBtn.addEventListener('click', function() {
            if (!resultTextarea.value) return;
            
            resultTextarea.select();
            document.execCommand('copy');
            
            // 视觉反馈
            this.innerHTML = `
                <svg width="18" height="18" viewBox="0 0 24 24">
                    <path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"/>
                </svg>
                已复制!
            `;
            setTimeout(() => {
                this.innerHTML = `
                    <svg width="18" height="18" viewBox="0 0 24 24">
                        <path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"/>
                    </svg>
                    复制密码
                `;
            }, 2000);
        });
        
        // 提交表单生成密码
        function generatePassword() {
            generateBtn.innerHTML = `
                <svg width="18" height="18" viewBox="0 0 24 24" style="animation: spin 1s linear infinite;">
                    <path fill="currentColor" d="M12,4V2A10,10 0 0,0 2,12H4A8,8 0 0,1 12,4Z"/>
                </svg>
                生成中...
            `;
            
            // 发送AJAX请求
            fetch('', {
                method: 'POST',
                headers: {
                    'X-Requested-With': 'XMLHttpRequest',
                    'Content-Type': 'application/x-www-form-urlencoded'
                },
                body: new URLSearchParams(new FormData(passwordForm))
            })
            .then(response => response.json())
            .then(data => {
                resultTextarea.value = data.password;
                generateBtn.innerHTML = `
                    <svg width="18" height="18" viewBox="0 0 24 24">
                        <path fill="currentColor" d="M17.65,6.35C16.2,4.9 14.21,4 12,4A8,8 0 0,0 4,12A8,8 0 0,0 12,20C15.73,20 18.84,17.45 19.73,14H17.65C16.83,16.33 14.61,18 12,18A6,6 0 0,1 6,12A6,6 0 0,1 12,6C13.66,6 15.14,6.69 16.22,7.78L13,11H20V4L17.65,6.35Z"/>
                    </svg>
                    重新生成
                `;
                
                // 更新密码强度指示器
                updateStrengthIndicator(data.password);
            })
            .catch(error => {
                console.error('Error:', error);
                generateBtn.innerHTML = `
                    <svg width="18" height="18" viewBox="0 0 24 24">
                        <path fill="currentColor" d="M17.65,6.35C16.2,4.9 14.21,4 12,4A8,8 0 0,0 4,12A8,8 0 0,0 12,20C15.73,20 18.84,17.45 19.73,14H17.65C16.83,16.33 14.61,18 12,18A6,6 0 0,1 6,12A6,6 0 0,1 12,6C13.66,6 15.14,6.69 16.22,7.78L13,11H20V4L17.65,6.35Z"/>
                    </svg>
                    重新生成
                `;
            });
        }
        
        // 提交表单
        generateBtn.addEventListener('click', function(e) {
            e.preventDefault();
            generatePassword();
        });
        
        // 增减密码长度
        decrementBtn.addEventListener('click', function() {
            if (parseInt(lengthInput.value) > 8) {
                lengthInput.value = parseInt(lengthInput.value) - 1;
                generatePassword();
            }
        });
        
        incrementBtn.addEventListener('click', function() {
            if (parseInt(lengthInput.value) < 50) {
                lengthInput.value = parseInt(lengthInput.value) + 1;
                generatePassword();
            }
        });
        
        // 选项变化时重新生成
        const options = ['lowercase', 'uppercase', 'numbers', 'symbols'];
        options.forEach(option => {
            document.getElementById(option).addEventListener('change', generatePassword);
        });
        
        // 更新密码强度指示器
        function updateStrengthIndicator(password) {
            let strength = 0;
            
            // 计算长度得分
            if (password.length >= 12) strength += 2;
            else if (password.length >= 8) strength += 1;
            
            // 检查字符类型
            const hasLowercase = /[a-z]/.test(password);
            const hasUppercase = /[A-Z]/.test(password);
            const hasNumbers = /[0-9]/.test(password);
            const hasSymbols = /[^a-zA-Z0-9]/.test(password);
            
            // 计算字符类型得分
            const typeCount = [hasLowercase, hasUppercase, hasNumbers, hasSymbols].filter(Boolean).length;
            strength += typeCount;
            
            // 设置强度等级 (0-4)
            const strengthLevel = Math.min(4, Math.max(1, strength));
            const percentage = Math.min(100, strengthLevel * 25);
            
            // 更新UI
            strengthIndicator.style.width = `${percentage}%`;
            
            // 设置进度条颜色和文本
            if (strengthLevel < 2) {
                strengthIndicator.style.backgroundColor = '#e74c3c';
                strengthText.textContent = '弱';
                strengthText.style.color = '#e74c3c';
            } else if (strengthLevel < 3) {
                strengthIndicator.style.backgroundColor = '#f39c12';
                strengthText.textContent = '中';
                strengthText.style.color = '#f39c12';
            } else if (strengthLevel < 4) {
                strengthIndicator.style.backgroundColor = '#3498db';
                strengthText.textContent = '强';
                strengthText.style.color = '#3498db';
            } else {
                strengthIndicator.style.backgroundColor = '#27ae60';
                strengthText.textContent = '很强';
                strengthText.style.color = '#27ae60';
            }
        }
        
        // 页面加载时更新强度指示器（如果有密码）
        if (resultTextarea.value && resultTextarea.value !== '') {
            updateStrengthIndicator(resultTextarea.value);
        }
        
        // 添加旋转动画
        const style = document.createElement('style');
        style.innerHTML = `
            @keyframes spin {
                0% { transform: rotate(0deg); }
                100% { transform: rotate(360deg); }
            }
        `;
        document.head.appendChild(style);
    </script>
</body>
</html>

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