PHP的 - 如何從JavaScript傳遞參數到一個PHP類，並返回響應返回到js

Question

我想與PHP一起使用PHP類，但我需要修改類以便能夠通過它參數，因爲我不太熟悉PHP，我不知道如何做到這一點。這是下面的類 - 正如你可以看到它使用一個靜態變量$ site，但我希望能夠傳入站點變量。我也希望能夠返回數據。有人知道怎麼做嗎？

<?php 
/** 
* Makes a request to AWIS for site info. 
*/ 
class UrlInfo { 

    protected static $ActionName  = 'UrlInfo'; 
    protected static $ResponseGroupName = 'Rank,LinksInCount'; 
    protected static $ServiceHost  = 'awis.amazonaws.com'; 
    protected static $NumReturn   = 10; 
    protected static $StartNum   = 1; 
    protected static $SigVersion  = '2'; 
    protected static $HashAlgorithm  = 'HmacSHA256'; 

    public function UrlInfo($accessKeyId, $secretAccessKey, $site) { 
     $this->accessKeyId = $accessKeyId; 
     $this->secretAccessKey = $secretAccessKey; 
     $this->site = $site; 
    } 

    /** 
    * Get site info from AWIS. 
    */ 
    public function getUrlInfo() { 
     $queryParams = $this->buildQueryParams(); 
     $sig = $this->generateSignature($queryParams); 
     $url = 'http://' . self::$ServiceHost . '/?' . $queryParams . '&Signature=' . $sig; 
     echo "\nURL: " . $url . "<br/>"; 
     $ret = self::makeRequest($url); 
     echo "\nResults for " . $this->site .":\n\n"; 
     self::parseResponse($ret); 
    } 

    /** 
    * Builds current ISO8601 timestamp. 
    */ 
    protected static function getTimestamp() { 
     return gmdate("Y-m-d\TH:i:s.\\0\\0\\0\\Z", time()); 
    } 

    /** 
    * Builds query parameters for the request to AWIS. 
    * Parameter names will be in alphabetical order and 
    * parameter values will be urlencoded per RFC 3986. 
    * @return String query parameters for the request 
    */ 
    protected function buildQueryParams() { 
     $params = array(
      'Action'   => self::$ActionName, 
      'ResponseGroup'  => self::$ResponseGroupName, 
      'AWSAccessKeyId' => $this->accessKeyId, 
      'Timestamp'   => self::getTimestamp(), 
      'Count'    => self::$NumReturn, 
      'Start'    => self::$StartNum, 
      'SignatureVersion' => self::$SigVersion, 
      'SignatureMethod' => self::$HashAlgorithm, 
      'Url'    => $this->site 
     ); 
     ksort($params); 
     $keyvalue = array(); 
     foreach($params as $k => $v) { 
      $keyvalue[] = $k . '=' . rawurlencode($v); 
     } 
     $keyImplode = implode('&',$keyvalue); 
     return implode('&',$keyvalue); 
    } 

    /** 
    * Makes request to AWIS 
    * @param String $url URL to make request to 
    * @return String  Result of request 
    */ 
    protected static function makeRequest($url) { 
     /*echo "\nMaking request to:\n$url\n";*/ 
     $ch = curl_init($url); 
     curl_setopt($ch, CURLOPT_TIMEOUT, 4); 
     curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); 
     $result = curl_exec($ch); 
     curl_close($ch); 
     return $result; 
    } 

    /** 
    * Parses XML response from AWIS and displays selected data 
    * @param String $response xml response from AWIS 
    */ 
    public static function parseResponse($response) { 
     $xml = new SimpleXMLElement($response,null,false, 
            'http://awis.amazonaws.com/doc/2005-07-11'); 
     if($xml->count() && $xml->Response->UrlInfoResult->Alexa->count()) { 
      $info = $xml->Response->UrlInfoResult->Alexa; 
      $nice_array = array(
       'Links In Count' => $info->ContentData->LinksInCount, 
       'Rank'   => $info->TrafficData->Rank 
      ); 
     } 
     foreach($nice_array as $k => $v) { 
      echo $k . ': ' . $v ."\n"; 
     } 
    } 

    /** 
    * Generates an HMAC signature per RFC 2104. 
    * 
    * @param String $url  URL to use in createing signature 
    */ 
    protected function generateSignature($url) { 
     $sign = "GET\n" . strtolower(self::$ServiceHost) . "\n/\n". $url; 
     echo "String to sign: \n" . $sign . "\n"; 
     $sigHMAC = hash_hmac('sha256', $sign, $this->secretAccessKey, true); 
     echo "<br/>HMAC: " . $sigHMAC; 
     $sig64 = base64_encode($sigHMAC); 
     echo "<br/>BASE64: " . $sig64 . "<br/>"; 
     $sig = base64_encode(hash_hmac('sha256', $sign, $this->secretAccessKey, true)); 
     echo "<br/>ENCODED URL: " . rawurlencode($sig) ."<br/>"; 
     return rawurlencode($sig); 
    } 

} 

/*if (count($argv) < 4) { 
    echo "Usage: $argv[0] ACCESS_KEY_ID SECRET_ACCESS_KEY site\n"; 
    exit(-1); 
} 
else { 
    $accessKeyId = $argv[1]; 
    $secretAccessKey = $argv[2]; 
    $site = $argv[3]; 
}*/ 

$accessKeyId = "AKIAJA664T37BDNPSXXX"; 
$secretAccessKey = "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"; 
$site = "http://site.com"; 

$urlInfo = new UrlInfo($accessKeyId, $secretAccessKey, $site); 
$urlInfo->getUrlInfo(); 

?> 

Answer 1

我不認爲你必須修改類。只需構建一個PHP腳本，你不能將JS中的變量傳遞給JSON，並生成JSON。例如： -

<?php 
    $data = array(); 
    if ($_GET['ONE_PARAM']) 
    { 
     $url = new UrlInfo(); 
     $data = $url->YOUR_METHOD($_GET['ONE_PARAM']); 
    } 
    header('Content-type: application/json'); 
    echo(json_encode($data)); 
?> 

然後你通過AJAX通過你的JS變量到PHP腳本，並閱讀來自那裏的響應。

Answer 2

你永遠不會定義你在構造函數中使用的類變量。你需要在你的班級申報：

<?php 
/** 
* Makes a request to AWIS for site info. 
*/ 
class UrlInfo { 

    protected static $ActionName  = 'UrlInfo'; 
    protected static $ResponseGroupName = 'Rank,LinksInCount'; 
    protected static $ServiceHost  = 'awis.amazonaws.com'; 
    protected static $NumReturn   = 10; 
    protected static $StartNum   = 1; 
    protected static $SigVersion  = '2'; 
    protected static $HashAlgorithm  = 'HmacSHA256'; 

    // Add your public class variables here 
    public $accessKeyId; 
    public $secretAccessKey; 
    public $site; 

    public function UrlInfo($accessKeyId, $secretAccessKey, $site) { 
     $this->accessKeyId = $accessKeyId; 
     $this->secretAccessKey = $secretAccessKey; 
     $this->site = $site; 
    }