Php single line comment:#


# This is shell-style style comment

1.	Shell style comments
2.	PHP comments are usually preceded by double slashes
3.	Php more than single line comment
4.	Combine three types of comment signs
5.	A comment is text in a script that is ignored by the PHP engine.
6.	shell style comments
7.	In PHP, everything between /* and */ is considered a comment
8.	Multiline comments
9.	Multiline comments begin with a forward slash followed by an asterisk (/) and end with an asterisk followed by a forward slash (/)
10.	PHP supports C, C++ and Unix shell-style comments

Php single line comment:# : Comments « Language Basics « PHP