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 8.3% of the 8513 total user notes.
Notes | Page -------+--------------------------------------------------------- 42 | http://php.net/manual/en/language.oop.php 38 | http://php.net/manual/en/function.header.php 38 | http://php.net/manual/en/language.variables.scope.php 37 | http://php.net/manual/en/function.mail.php 37 | http://php.net/manual/en/ref.exec.php 37 | http://php.net/manual/en/function.substr.php 36 | http://php.net/manual/en/function.ereg.php 36 | http://php.net/manual/en/function.wordwrap.php 36 | http://php.net/manual/en/language.variables.external.php 35 | http://php.net/manual/en/language.types.array.php 35 | http://php.net/manual/en/ref.curl.php 35 | http://php.net/manual/en/function.ereg-replace.php 34 | http://php.net/manual/en/ref.java.php 34 | http://php.net/manual/en/install.iis.php 34 | http://php.net/manual/en/function.fopen.php 34 | http://php.net/manual/en/ref.xslt.php 33 | http://php.net/manual/en/ref.oci8.php 33 | http://php.net/manual/en/function.fsockopen.php 33 | http://php.net/manual/en/function.imagecopyresized.php 33 | http://php.net/manual/en/function.setcookie.php