PHP uses curl and reports parse error

This code was sent to me by my classmate

<code class="PHP"><?php
　　$ch = curl_init("http://www.baidu.com");//初始化

　　curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
　　curl_setopt($ch, CURLOPT_HEADER, 0);

　　$output = curl_exec($ch);

　　curl_close($ch);
　　echo $output;
?>
</code>

Exactly the same code, I pasted his code and it ran smoothly, but I typed it by hand and it ran fine

Excuse me, what’s going on? Thank you :-)

Reply content:

This code was sent to me by my classmate

<code class="PHP"><?php
　　$ch = curl_init("http://www.baidu.com");//初始化

　　curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
　　curl_setopt($ch, CURLOPT_HEADER, 0);

　　$output = curl_exec($ch);

　　curl_close($ch);
　　echo $output;
?>
</code>

Exactly the same code, I pasted his code and it ran smoothly, but I typed it by hand and it ran fine

Excuse me, what’s going on? Thank you :-)

There are hidden characters, I have encountered them too.

The semicolon is missing...