利用PHP查看URL中的自己人

substr_count(string,substring,start,length)

<?php 

$url = &#39;//m.sbmmt.com&#39;; 
$key = &#39;cn&#39;; 
if (substr_count($url, $key) == false) 

  echo &#39;URL中不存在子字符串&#39;.$key; 
 else 
  echo &#39;URL中存在子字符串&#39;.$key; 
  
echo "<br>";

$key1=&#39;com&#39;;
if (substr_count($url, $key1) == false)
 echo &#39;URL中不存在子字符串 &#39;.$key1.&#39; <br>&#39; ; 
 else 
  echo &#39;URL中存在 &#39;.$key1.&#39; <br>&#39; ;

?>

URL中存在子字符串cn
URL中不存在 com

strpos(string,find,start)

<?php 

$url = &#39;//m.sbmmt.com&#39;;  

$key = &#39;cn&#39;; 
  
if (strpos($url, $key) == false) { 
  echo &#39;URL中不存在子字符串&#39;.$key.&#39; <br>&#39; ; 
} 
else { 
  echo &#39;URL中存在子字符串 &#39;.$key.&#39; <br>&#39; ; 
} 
  
echo "<br>";
$key1 = &#39;com&#39;; 
  
if (strpos($url, $key1) == false) { 
  echo &#39;URL中不存在子字符串 &#39;.$key1;
} 
else { 
  echo &#39;URL中存在子字符串 &#39;.$key1 ; 
} 
?>

URL中存在子字符串 cn 

URL中不存在子字符串 com