Use PHP to view your own people in the URL

Method 1: Use the substr_count() function

a. Grammar format:

substr_count(string,substring,start,length)

• string: The string being checked.

• #substring: The string to search for.

• #start: Specifies where to start searching in the string. (Optional)

• #length: Specifies the length of the search. (Optional)

Return value: Returns the number of times the substring appears in the string.

b. Example:

<?php 

$url = &#39;http://www.php.cn&#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; ;

?>

c. Output:

URL中存在子字符串cn
URL中不存在 com

Method 2: Use the strpos() function

a. Syntax format:

strpos(string,find,start)

• string The string to be searched.​

• #find The string to be found.​

• #start Where to start the search. (Optional)

Return value: Find the first occurrence of a string in another string.

ps: The strpos() function is case-sensitive.

b.Example:

<?php 

$url = &#39;http://www.php.cn&#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 ; 
} 
?>

c.Output:

URL中存在子字符串 cn 

URL中不存在子字符串 com

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