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 8.9% of the 11747 total user notes.
Notes | Page -------+--------------------------------------------------------- 73 | http://php.net/manual/en/function.header.php 61 | http://php.net/manual/en/function.date.php 61 | http://php.net/manual/en/function.preg-replace.php 59 | http://php.net/manual/en/function.mssql-connect.php 58 | http://php.net/manual/en/ref.session.php 57 | http://php.net/manual/en/ref.com.php 52 | http://php.net/manual/en/function.time.php 52 | http://php.net/manual/en/function.mktime.php 51 | http://php.net/manual/en/function.fsockopen.php 50 | http://php.net/manual/en/function.strtotime.php 49 | http://php.net/manual/en/ref.xml.php 48 | http://php.net/manual/en/function.sort.php 48 | http://php.net/manual/en/function.readdir.php 48 | http://php.net/manual/en/function.fopen.php 47 | http://php.net/manual/en/ref.datetime.php 47 | http://php.net/manual/en/function.str-replace.php 46 | http://php.net/manual/en/features.file-upload.php 46 | http://php.net/manual/en/ref.image.php 45 | http://php.net/manual/en/function.strftime.php 44 | http://php.net/manual/en/function.array-search.php