php_strip_whitespace Return source with stripped comments and whitespace &reftitle.description; stringphp_strip_whitespace stringfilename Returns the PHP source code in filename with PHP comments and whitespace removed. This may be useful for determining the amount of actual code in your scripts compared with the amount of comments. &reftitle.returnvalues; The stripped source code will be returned on success, or an empty string on failure. &reftitle.examples; ]]> &example.outputs; ]]> Notice the PHP comments are gone, as are the whitespace and newline after the first echo statement.