htmlspecialchars不能在字符串上工作

Question

當我使用cURL來獲取網站，並對結果做strlen（）時，我得到72354.但是，當我通過htmlspecialchars（）傳遞結果，然後執行strlen（）時，我得到0。有任何想法嗎？這裏是我的代碼：

<?php 
$ch = curl_init(); 
curl_setopt($ch, CURLOPT_URL, 'https://www.google.com/search?q=test'); 
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false); 
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); 
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); 
curl_setopt($ch, CURLOPT_HEADER, 1); 

$result = curl_exec($ch); 
echo strlen($result); 
echo '<br>'; 
echo strlen(htmlspecialchars($result)); 

Answer 1

嘗試

<?php 

$ch = curl_init(); 
curl_setopt($ch, CURLOPT_URL, 'https://www.google.com/search?q=test'); 
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false); 
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); 
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); 
curl_setopt($ch, CURLOPT_HEADER, 1); 

$result = curl_exec($ch); 
echo strlen($result); 
echo '<br>'; 
echo strlen(htmlspecialchars($result, ENT_QUOTES)); 
echo '<br>'; 
echo htmlspecialchars($result, ENT_COMPAT,'ISO-8859-1', true); 

?>