import requests

# 讓使用者自行輸入網址
user_input = input("請輸入要查詢的網址 (例如 example.com 或 https://example.com): ").strip()

# 自動檢查並補齊 http:// 或 https:// 字頭
if not user_input.startswith(('http://', 'https://')):
    url = 'https://' + user_input
    print(f"💡 網址自動修正為: {url}")
else:
    url = user_input

headers = {
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36'
}

try:
    # 發送 HEAD 請求（只抓取 Header，速度快且省流量）
    response = requests.head(url, headers=headers, timeout=5, allow_redirects=True)
    
    # 取得回傳的 Headers
    res_headers = response.headers
    
    # 檢查常見的版本欄位
    x_powered_by = res_headers.get('X-Powered-By')
    server_info = res_headers.get('Server')
    
    print(f"\n--- 查詢網站: {url} ---")
    
    # 判斷並顯示 PHP 版本資訊
    if x_powered_by and 'PHP' in x_powered_by:
        print(f"✅ 成功偵測到 PHP 版本 (來自 X-Powered-By): {x_powered_by}")
    elif server_info and 'PHP' in server_info:
        print(f"✅ 成功偵測到 PHP 版本 (來自 Server): {server_info}")
    else:
        print("❌ 無法直接從 Header 判斷 PHP 版本。")
        print("\n[說明] 沒抓到原因可能是：")
        print("1. 該網站不是用 PHP 寫的。")
        print("2. 網站為了安全性（資安防護），故意關閉或隱藏了版本欄位。")
        
    # 顯示完整的 Headers 供您人工檢查
    print("\n完整的 Response Headers 如下：")
    for key, value in res_headers.items():
        print(f"{key}: {value}")

except requests.exceptions.RequestException as e:
    print(f"\n❌ 連線發生錯誤，請檢查網址是否正確或網路是否通暢。")
    print(f"錯誤訊息: {e}")

# Prompt the user to enter a target URL
$userInput = Read-Host "Please enter URL (e.g. example.com)"

# Trim any accidental spaces from the beginning and end of the input
$userInput = $userInput.Trim()

# Validate that the input is not empty or full of spaces
if ([string]::IsNullOrEmpty($userInput)) {
    Write-Host "X Error: URL cannot be empty!" -ForegroundColor Red
    exit
}

# Automatically add 'https://' prefix if the user omitted http:// or https://
if ($userInput -notmatch "^https?://") {
    $url = "https://" + $userInput
    Write-Host "URL auto-fixed to: $url" -ForegroundColor Cyan
} else {
    $url = $userInput
}

Write-Host "Connecting to: $url ..." -ForegroundColor Yellow

try {
    # Send an HTTP GET request (Limit to 5 redirects max, timeout in 5 seconds)
    # -UseBasicParsing is used to speed up the process and reduce dependency on Internet Explorer
    $response = Invoke-WebRequest -Uri $url -Method Get -MaximumRedirection 5 -TimeoutSec 5 -UseBasicParsing
    
    # Extract the HTTP headers from the response object
    $resHeaders = $response.Headers
    
    # Fetch specific headers (PowerShell hash table keys are case-insensitive)
    $xPoweredBy = $resHeaders["X-Powered-By"]
    $serverInfo = $resHeaders["Server"]
    
    Write-Host "=== Result ===" -ForegroundColor Green
    $detected = $false
    
    # Check if 'X-Powered-By' header exists and contains the keyword 'PHP'
    if ($xPoweredBy -and ($xPoweredBy -like "*PHP*")) {
        Write-Host "[OK] Detected PHP (from X-Powered-By): $($xPoweredBy)" -ForegroundColor Green
        $detected = $true
    }
    
    # Check if 'Server' header exists and contains the keyword 'PHP'
    if ($serverInfo -and ($serverInfo -like "*PHP*")) {
        Write-Host "[OK] Detected PHP (from Server): $($serverInfo)" -ForegroundColor Green
        $detected = $true
    }
    
    # If neither header exposed PHP information
    if (-not $detected) {
        Write-Host "[!] Cannot detect PHP version from headers." -ForegroundColor Yellow
        Write-Host "Reason 1: The site is not built with PHP."
        Write-Host "Reason 2: The server hidden the version headers for security."
    }
    
    # Print out all headers retrieved from the target website for manual checking
    Write-Host "=== Full Response Headers ===" -ForegroundColor Cyan
    foreach ($key in $resHeaders.Keys) {
        Write-Host "$($key): $($resHeaders[$key])"
    }
}
catch {
    # Catch any connection errors, DNS resolution failures, or HTTP 404/500 errors
    Write-Host "X Connection Error!" -ForegroundColor Red
    Write-Host "Error Message: $($_.Exception.Message)" -ForegroundColor Red
}

#!/bin/bash

# 讓使用者輸入網址
read -p "請輸入要查詢的網址 (例如 example.com): " USER_INPUT

# 移除前後空白
USER_INPUT=$(echo "$USER_INPUT" | xargs)

# 如果使用者沒有輸入，直接退出
if [ -z "$USER_INPUT" ]; then
    echo "❌ 錯誤：網址不能為空！"
    exit 1
fi

# 自動補齊 http:// 或 https://
if [[ ! "$USER_INPUT" =~ ^https?:// ]]; then
    URL="https://$USER_INPUT"
    echo "💡 網址自動修正為: $URL"
else
    URL="$USER_INPUT"
fi

echo -e "\n--- 正在連線至: $URL ---\n"

# 使用 curl 抓取 Header 資訊
# -I: 只抓取 Header (HEAD 請求)
# -s: 靜音模式，不顯示進度條
# -L: 跟隨重新導向 (Redirect)
# --max-time 5: 逾時時間 5 秒
HTTP_HEADERS=$(curl -IsL --max-time 5 "$URL" 2>/dev/null)

# 檢查 curl 是否執行成功
if [ $? -ne 0 ] || [ -z "$HTTP_HEADERS" ]; then
    echo "❌ 連線失敗，請檢查網址或網路狀態。"
    exit 1
fi

# 透過 grep 擷取相關欄位 (不區分大小寫 -i)
X_POWERED_BY=$(echo "$HTTP_HEADERS" | grep -i "X-Powered-By:")
SERVER_INFO=$(echo "$HTTP_HEADERS" | grep -i "Server:")

# 偵測與判斷邏輯
DETECTED=0

if echo "$X_POWERED_BY" | grep -iq "PHP"; then
    # 移除斷行符號 \r 並印出
    echo "✅ 成功偵測到 PHP 版本 (來自 X-Powered-By):"
    echo "   $(echo "$X_POWERED_BY" | tr -d '\r')"
    DETECTED=1
fi

if echo "$SERVER_INFO" | grep -iq "PHP"; then
    echo "✅ 成功偵測到 PHP 版本 (來自 Server):"
    echo "   $(echo "$SERVER_INFO" | tr -d '\r')"
    DETECTED=1
fi

# 如果都沒抓到 PHP 關鍵字
if [ $DETECTED -eq 0 ]; then
    echo "❌ 無法直接從 Header 判斷 PHP 版本。"
    echo -e "\n[說明] 沒抓到原因可能是："
    echo "1. 該網站不是用 PHP 寫的。"
    echo "2. 網站管理者已關閉這兩個欄位（資安防護做得很好）。"
fi

# 顯示完整 Headers 供人工核對
echo -e "\n=== 完整的 Response Headers ==="
echo "$HTTP_HEADERS"