Re: including() only given amount of lines

On Sunday 11 May 2003 00:45, iliketheworld@gmx.ch wrote: > am 10.05.2003 15:44 Uhr schrieb Jason Wong unter php-general@gremlins.biz: > > On Saturday 10 May 2003 19:53, iliketheworld@gmx.ch wrote: > >> 1. i would like to include only a given amount (the first 50) lines of a > >> text file. i think they should be included using fgets() or fread() > >> instead of include() but i dont know how. > >> > >> 2. besides that i need to include the laste 50 lines of a text file -- > >> in reversed order! > > > > The easiest way would be to use file() and the array manipulation > > functions. > > yes, but isn't a 500+ line file a bit heavy to read into an array? i > thought this may cause massive slow down -- isn't it? Assuming you have 500 lines each with 80 chars, that's around 40KB. Further assume that in storing those lines into an array increases its storage requirements ten-fold. That still only uses 400KB -- a piddling amount of memory these days (unless you're running your webserver on 32MB). For (1), if you wanted to do it using fgets() it's just a simple matter of opening the file with fopen() then use a for-loop to call fgets() 50 times. For (2), it's more complicated. You would probably have to use fread() then count how many newline characters there are. Then loop N times and skip the first N-50 lines and keep the rest. For both (1) and (2) if you're using a un*x system and don't mind a non-portable way of doing things then have a look at head and tail. -- Jason Wong -> Gremlins Associates -> www.gremlins.biz Open Source Software Systems Integrators * Web Design & Hosting * Internet & Intranet Applications Development * ------------------------------------------ Search the list archives before you post http://marc.theaimsgroup.com/?l=php-general ------------------------------------------ /* Apathy Club meeting this Friday. If you want to come, you're not invited. */