➤ A comment in PHP code is a line that is not executed as a part of the program. Its only purpose is to be read by someone who is looking at the code. • Let others understand your code. • Remind yourself of what you did. PHP supports several ways of commenting:

// This is a single-line comment

# This is also a single-line comment

/*
This is a multiple-lines comment block
that spans over multiple
lines
*/

// You can also use comments to leave out parts of a code line
$a = 2 /* - 1 */ + 4;