PHP sendmail, save mails in local filesystem folder

Params:
OS: Gentoo
Language: PHP 5.3.8

Problem:
Save mails sended from PHP script in local filesystem folder.
View them by KMail

Solution:
Make all changes relative to your distro.
1) Create script fakesendmail.sh

#!/bin/sh 

prefix="/home/<my_username>/temp/sendmail/new"

numPath="/home/<my_username>/temp/sendmail"

if [ ! -f $numPath/num ]; then

    echo "0" > $numPath/num
fi

num=`cat $numPath/num`

num=$(($num + 1))
echo $num > $numPath/num 

name="$prefix/letter_$num.txt"

while read line

do

     echo $line >> $name

done

chmod 777 $name

/bin/true

I saved it in folder /home/<my_username>/Applications/

Don't forget set appropriate pathes in script.

2) Make this script executable: console> chmod +x fakesendmail.sh

3) Create folders for mails: 

console> mkdir 

/home/<my_username>/temp/sendmail/

console> mkdir 

/home/<my_username>/temp/sendmail/cur

console> mkdir 

/home/<my_username>/temp/sendmail/new

console> mkdir 

/home/<my_username>/temp/sendmail/tmp

4) Change folder properties: console> chmod 777 -R 

/home/<my_username>/temp/sendmail/

5) Make changes in php.ini file (on gentoo: /etc/php/apache2-php5.3/php.ini)

Change path to sendmail script to our new script:

sendmail_path = /home/<my_username>/Applications/fakesendmail.sh
6) Open KMail and create new incoming account.
Kontact->Settings->Configure KMail->Accounts->Add Account
In opened window choose "Maildir mailbox" and set appropriate folder "

/home/<my_username>/temp/sendmail"