PHP supports 'C', 'C++' and Unix shell-style (Perl style) comments. For example:
<?php echo 'This is a test'; // This is a one-line c++ style comment /* This is a multi line comment yet another line of comment */ echo 'This is yet another test'; echo 'One Final Test'; # This is a one-line shell-style comment ?>
The "one-line" comment styles only comment to the end of
the line or the current block of PHP code, whichever comes first.
This means that HTML code after // ... ?>
or # ... ?> WILL be printed:
?> breaks out of PHP mode and returns to HTML mode, and
// or # cannot influence that.
If the asp_tags configuration directive
is enabled, it behaves the same with // %> and
# %>.
However, the </script> tag doesn't break out of PHP mode in
a one-line comment.
<h1>This is an <?php # echo 'simple';?> example.</h1> <p>The header above will say 'This is an example'.</p>
'C' style comments end at the first */ encountered.
Make sure you don't nest 'C' style comments. It is easy to make this
mistake if you are trying to comment out a large block of code.
<?php /* echo 'This is a test'; /* This comment will cause a problem */ */ ?>
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