Can a client view server-side PHP source code?

Question

I\'m developing a PHP application that has to respond to request from several clients, and I thinks \"Can any of the clients see the PHP code that I\'m writing?\".

Answer 1

One mistake for it to happen is to paste a php tag inside a php string, example:

$string = "This is the answer: "; 
echo $string;

The person did a Ctrl+C and Ctrl+V of something that should be printed along the string, but the coder forgot to remove the php tags by distraction.