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:

"; $key1='com'; if (substr_count($url, $key1) == false) echo 'URL中不存在子字符串 '.$key1.' 
' ; else echo 'URL中存在 '.$key1.' 
' ; ?>

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:

' ; } else { echo 'URL中存在子字符串 '.$key.' 
' ; } echo "
"; $key1 = 'com'; if (strpos($url, $key1) == false) { echo 'URL中不存在子字符串 '.$key1; } else { echo 'URL中存在子字符串 '.$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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