Following are the top 20 pages of the manual, sorted by the number of user notes contributed. These sections could use a polish, those notes represent 7.2% of the 22256 total user notes.
Notes | Page -------+--------------------------------------------------------- 89 | http://php.net/manual/en/function.strip-tags.php 87 | http://php.net/manual/en/function.round.php 84 | http://php.net/manual/en/function.strpos.php 84 | http://php.net/manual/en/function.htmlentities.php 83 | http://php.net/manual/en/function.fgetcsv.php 83 | http://php.net/manual/en/function.curl-setopt.php 82 | http://php.net/manual/en/function.mail.php 82 | http://php.net/manual/en/function.array-search.php 81 | http://php.net/manual/en/features.file-upload.php 80 | http://php.net/manual/en/function.setcookie.php 80 | http://php.net/manual/en/ref.curl.php 80 | http://php.net/manual/en/function.wordwrap.php 79 | http://php.net/manual/en/ref.mail.php 77 | http://php.net/manual/en/language.variables.scope.php 77 | http://php.net/manual/en/function.include.php 77 | http://php.net/manual/en/ref.simplexml.php 77 | http://php.net/manual/en/function.flock.php 76 | http://php.net/manual/en/function.eval.php 76 | http://php.net/manual/en/function.date.php 76 | http://php.net/manual/en/ref.mssql.php