Can I tell fwrite where to write in a file?

schwim

Hi there guys,

I'm toying with a bot blocking script and I was going to offer the user a chance to block either via htaccess or a php include.

I want them to be able to block by multiple methods; IP/referer/user agent, and if it's done via htaccess, then I'll have these sections where the script would add any new additions. I'd like to segregate this so I can print the separate sections to screen if they want to view/delete any later.

I'm wondering if there's any way to dictate where fwrite writes in a file.

#
#Section for referer
#
SetEnvIfNoCase Referer /\#$ BadReferrer
SetEnvIfNoCase Referer html\#$ BadReferrer
SetEnvIfNoCase Referer php\#$ BadReferrer

#
#Section for user-agent
#
SetEnvIfNoCase User-Agent "^libwww-perl*" BadBots

order allow,deny
deny from env=BadReferrer
deny from env=BadBots

#
#Section for IPs
#
deny from 80.41.19.27
deny from 80.227.0.153
deny from 69.16.200.85
deny from 125.18.15.99
deny from 89.124.215.108
deny from 89.124.215.103
deny from 89.124.215.61
deny from 89.124.215.254

<Files 403.shtml>
order deny,allow
allow from all
</Files>


ErrorDocument 403 /403.shtml
ErrorDocument 404 /404.shtml

You can see how I've divvied up the conditions. Can I write the script to write to particular portions of the file? If so, how would I go about doing this?

thanks,
json

halojoy

there is some functions
to move the filepointer

[man]fseek[/man] [man]rewind[/man]
but this is to use only when reading, I think

to write a segment of the file
Ithink you have to

1. read the file data, into a string
2. write to segment in this string
3. write resulting string to file

I use mostly fopen 'wb' .... write binary

Only sometimes the file_get_contents, file_put_contents

Weedpacket

You can use [man]fseek[/man] when writing. The tricky part is knowing where to seek to.

schwim

Well at first, I was thrilled to hear that, but after reading the function page, I think I'm more likely to successfully perform brain surgery 🙂

Thanks very much for your links guys. It seems like that may not be the way to go.

Maybe, rewrite the whole htaccess file every time a modification is made, huh?

thanks,
json