问：我正在尝试使用cURL执行以下操作：
*在Google上进行关键字搜索。
因此，基本上，当您在Google上进行关键字搜索时，cURL应该会获取Google搜索结果页（SERP），从而在代理页面（cURL获取的页面）上显示搜索结果。但是，cURL显示的是无效的Google SERP。这是为什么 ？
您可以在我的代码中发现任何错误吗？
<?php
//STEP 1: ERROR HANDLING
declare(strict_types=1);
ini_set('display_errors', '1');
ini_set('display_startup_errors', '1');
//For All Error, Warning and Notice
error_reporting(E_ALL);
E_DEPRECATED;
/* STEP 2:
The IF gets triggered as soon as the "submit" button is clicked in the ui text box labeled: Url
Following IF code deals with GET method.
*/
if(isset($_GET["url_to_proxify"]) === TRUE)
{
echo "IF got triggered!";
$url_to_proxify = filter_input(INPUT_GET, 'url_to_proxify', FILTER_VALIDATE_URL);
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "$url_to_proxify");
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, TRUE);
curl_setopt($ch, CURLOPT_HEADER, 5);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
$curl_result = curl_exec($ch);
$domain = parse_url($url_to_proxify, PHP_URL_HOST);
echo var_dump($domain);
//Add proxy link on all links present on proxified page
$pattern = array("http://", "https://", "http://www.", "https://www.", "localhost");
$replace = array("proxified_page_test.php?url_to_proxify=http://\".$domain\"", "proxified_page_test.php?url_to_proxify=https://\".$domain\"", "proxified_page_test.php?url_to_proxify=http://www.\".$domain\"", "proxified_page_test.php?url_to_proxify=https://www.\".$domain\"", "proxified_page_test.php?url_to_proxify=http://www.\".$domain\"");
$string_replaced_data = str_replace($pattern, $replace, $curl_result);
echo var_dump($string_replaced_data);
//Add proxy link on all Image Links (Eg. Google Img File)
$pattern = array('src="', 'src = "', 'src= "', 'src ="', "src='", "src = '", "src= '", "src='");
$replace = array('src="proxified_page_test.php?url_to_proxify=\".$domain\""', 'src = "proxified_page_test.php?url_to_proxify=\".$domain\""', 'src= "proxified_page_test.php?url_to_proxify=\".$domain\""', 'src ="proxified_page_test.php?url_to_proxify=\".$domain\""', "src='proxified_page_test.php?url_to_proxify=\".$domain\"'", "src = 'proxified_page_test.php?url_to_proxify=\".$domain\"'", "src= 'proxified_page_test.php?url_to_proxify=\".$domain\"'", "src ='proxified_page_test.php?url_to_proxify=\".$domain\"'");
$string_replaced_data = str_replace($pattern, $replace, $curl_result);
echo var_dump($string_replaced_data);
//Add proxy link on all links presented by the searchengine result pages (SERPS). Eg. Google Search Pages (SERPs)
$pattern = array('action="', 'action = "', 'action= "', 'action ="', "action='", "action = '", "action= '", "action='");
$replace = array('action="proxified_page_test.php?url_to_proxify=\".$domain\""', 'action = "proxified_page_test.php?url_to_proxify=\".$domain\""', 'action= "proxified_page_test.php?url_to_proxify=\".$domain\""', 'action ="proxified_page_test.php?url_to_proxify=\".$domain\""', "action='proxified_page_test.php?url_to_proxify=\".$domain\"'", "action = 'proxified_page_test.php?url_to_proxify=\".$domain\"'", "action= 'proxified_page_test.php?url_to_proxify=\".$domain\"'", "action ='proxified_page_test.php?url_to_proxify=\".$domain\"'");
$string_replaced_data = str_replace($pattern, $replace, $curl_result);
echo var_dump($string_replaced_data);
print_r($curl_result);
curl_close($ch);
}
else
{
echo "ELSE got triggered!";
//Html Form
?>
<html>
<body>
<form action = "<?php echo $_SERVER['PHP_SELF']; ?>" method = "GET">
Url: <input type = "text" name = "url_to_proxify" />
<input type = "submit" />
</form>
</body>
</html>
<?php
}
?>
答：正如您提到的那样，您想从Google搜索关键字，然后为什么要向用户询问URL。您应该询问关键字进行搜索。您还提到string_replace不适用于数组，是的，它是正确的。此函数仅适用于字符串替换，不适用于数组。
