Begging for PHP file read/write stream issues

What are the usage of these methods? What is the last method? It is better to mark comments. Thank you later .. Although the score is not much, there is no way. There's only so much. Thank you ....? PhpclassAccount_Del {CreateFilefunctionCreate_file ($ sFile) {if (! File_exis

What are the usage of these methods? What is the last method? It is better to mark comments. Thank you later .. Although the score is not much, there is no way. There's only so much. Thank you ....? Php class Account_Del {// Create File function Create_file ($ sFile) {if (! File_exis

What are the usage of these methods? What is the last method? It is better to mark comments. Thank you later .. Although the score is not much, there is no way. It's only so much. I'm grateful ....

Class Account_Del
{
/// Create File
Function Create_file ($ sFile)
{
If (! File_exists ($ sFile ))
{
$ Fp = fopen ($ sFile, "w + ");
System ('chown apache '. $ sFile );
Fclose ($ fp );
}
}

/// Delete File
Function Delete_file ($ sFile)
{
If (file_exists ($ sFile ))
Unlink ($ sFile );
}

Function DelAcc ()
{
If (! File_exists ("./ac/aclist. ini "))
Exit;

$ Fp = @ fopen ("./ac/aclist. ini", "r ");
$ Temp = "";
While (! Feof ($ fp ))
{
$ Temp = $ temp. fgets ($ fp );
}

$ Flag = false;

$ Temp = str_replace ("\ r \ n", "", $ temp );
$ Accounts = explode (",", $ temp );

$ Time = time ();
$ Nowdate = date ('Y-m-d', $ time );
$ Times1 = explode ("-", $ nowdate );

For ($ I = 0; $ I {
If ($ Accounts [$ I]! = "")
{
$ First = substr ($ Accounts [$ I], 0, 1 );
If (eregi ("^ [A-Za-z] {1} [A-Za-z] {0, 2} $", $ first ))
{
$ Accounts1 = explode ("&", $ Accounts [$ I]);
If (strlen ($ Accounts1 [1])> = 8) // Date Format: 2008-04-08/2008-4-8/2008-04-8/2008-4-08; minimum 8-bit; maximum 10-bit
{
$ Times2 = explode ("-", $ Accounts1 [1]);
$ N = (mktime (0, 0, 0, $ Times1 [1], $ Times1 [2], $ Times1 [0])-mktime (0, 0, 0, $ Times2 [1], $ Times2 [2], $ Times2 [0])/(60*60*24 );
If ($ n> = 90)
{
System ('/usr/sbin/userdel-R'. $ Accounts1 [0], $ return );
If ($ return = 0)
{
$ Flag = true;
$ Accounts [$ I] = "";
}
}
} // Strlen
} // Eregi
}
}

If ($ flag)
{
$ This-> Delete_file ("./ac/aclist. ini ");
$ This-> Create_file ("./ac/aclist. ini ");

$ Temp = "";
$ Fp = @ fopen ("./ac/aclist. ini", "");
For ($ I = 0; $ I {
If ($ Accounts [$ I]! = "")
{
If (eregi ("^ [a-z] {1} [a-z] {} $", substr ($ Accounts [$ I )))
$ Temp = $ temp. $ Accounts [$ I]. ',';
}
}
@ Fwrite ($ fp, $ temp );
@ Fclose ($ fp );
}

Exit;
}

} // End class

$ AccDel = new Account_Del;
$ AccDel-> DelAcc ();
?>

======= The information of the aclist. ini file = the end time of the User Name Creation Time ===

Root &, bin &, daemon &, adm &, lp &, sync &, shutdown &, halt &, mail &, news &&, uucp &, operator &, games &, gopher &, ftp &, nobody &, ntp &, rpc &, vcsa &, nscd &&, sshd &, rpm &, mailnull &, smmsp &, rpcuser &, nfsnobody &, pcap &, xfs &, wnn &, named &&, &, desktop &, postgres &, apache &, postfix &, squid &, webalizer &, oishare &, jasonma &, sente &&, mysql &, oi &, gaga &, fisherprice &, fisherprice327 &, hasbro &, mattel &, mattel_la &, softshare &, sonix &&, MGA &, temp &, VisualStudio &, stock &, sat &, leapfrog &, cdttest &, winenterprise &, PIL &, vtech &&, smtpu &, solforcarmen &, Mattel &, EI &, Tomy &, SWT &, mike &, mattel_hk &, Takara &, konami &&, cranium &, wizardtrow.& &, reddot &, hasbro_fran &, sonix-cdt &, fp_kd &, mgae &, temp_cdt &, usr &&, kdi &, kidsii &, TomyUK &, toytec &, DES &, mt &, warehouse &, acct_hk &, idt &, huaqi &&, omnivision &, mac &, it &, micomtech &, backpacktoys &, IDT &, pacific_hk &, mttest &, mga &, onyxx &&, test &, test1 &, mattel_tmp &, wiltec &, sunvigor &, spinmaster &, mis0810 & 2009-08-26 & 2035-12-31, mis0811 & 2009-08-11 & 2009-08-25, philips & 2009-08-11 & 2009-08-25, vt_temp & 2009-08-12 & 2009-08-26, sonosys & 2009-08-13 & 2009-08-27, R3916 & 2009-08-13 & 2009-08-27, www888 & 2009-08-14 & 2009-08-28, simtec & 2009-08-17 & 2009-08-31, puppy & 2009-08-18 & 2009-09-01 & idtidt & 2009-08-20 & 2009-09-03, R9100 & 2009-08-20 & 2009-09-03, Jun & 2009-08-21 & Jun, mhg & 2009-08-26 & 2009-09-09, Voice & 2009-08-27 & 2009-09-10, midi &, OI2009 &, mis0901 &, David W &, Herald,, wilsonli, Book, caddie, V117000, sound, ericfung & 2009-09-14 & 2009-09-28, vtech03 & 2009-09-15 & 2009-09-29, talent & 2009-09-16 & 2009-09-30, idthk & 2009-09-16 & 2009-09-30, vt110604 & 2009-09-16 & 2009-09-30, ching1 & 2009-09-17 & 2009-10-01, t4272 &, benjalin, mis0923,, t2rd0925, vt110622 & 2009-10-13, CLR & 2009-09-30 & 2009-10-14, vt110623 & 2009-09-30 & 2009-10-14, & 2009-09-30 & 2009-10-14, LC99596 & 2009-10-07 & 2009-10-21, TMC & 2009-10-07 & 2009-10-21, FB02 & 2009-10-01007 & 2009-10-21, Jun & 2009-10-010-08 & 2009-10-22, dm110622 & 2009-10-13 & 2009-10-27, rc2ef & 2009-10-14 & 2009-10-28, mis0914 & 2009-10-14 & 2009-10-28, Jun & 2009-10-15 & 2009-10-29, example & 2009-10-15 & 2009-10-29, example & 2009-10-15 & 2009-10-29, tt1016 & 2009-10-16 & 2009-10-30, balloon & 2009-10-16 & 2009-10-30, keita & 2009-10-16 & 2009-10-30, t1403712 & 2009-10-16 & 2009-10-30, examples & 2009-10-17 & 2009-10-31, caddie2 & 2009-10-22 & 2009-11-011-05, Chomp & 2009-10-27 & 2009-11-10, OTP & 2009-10-27 & 2009-11-10, spin1028 & 2009-10-28 & 2009-11-11, mis1028 & 2009-10-28 & 2009-11-11, CY800 & 2009-10-29 & 2009-11-12, rav & 2009-10-29 & 2009-11-12, Clerk & 2009-10-29 & 2009-11-12, radica & 2009-10-30 & 2009-11-13, nerul26f & 2009-11-4 & 2009-11-18, caddie3 & 2009-11-4 & 2009-11-18, rc2eric & 2009-11-5 & 2009-11-19,