PHP logging in code

Is it possible to write a PHP log-in form with 2 fields (username and password) so that the web page wouldn't need any box?

It should work as a command line. (think about linux/ms-dos terminal)

To get an idea of what I am saying, the page should run like the following C code (just run it if you want to see what am I talking about):

#include <conio.h>
#include <stdio.h>

int main()
{
    int DBl,i,tl;
    struct DB //DB-database
    {
        char u[32];
        char p[32];
    };
    char iu[32], ip[32];
    //iu - input user; ip -input passowrd

    //let's put some users in the database:
    struct DB q[100];
    sprintf(q[1].u,"%s","user");
    sprintf(q[1].p,"%s","pass");
    sprintf(q[2].u,"%s","admin");
    sprintf(q[2].p,"%s","admin");
    sprintf(q[3].u,"%s","username");
    sprintf(q[3].p,"%s","password");

    DBl=3; //database length
    tl=5; //tries left
    printf("Welcome to our website.\n");

    while (tl!=0)
    {
        printf("\nusername:   "); gets(iu);
        printf("\n%s@password:    ",iu);gets(ip);
        //printf("\n");
        for (i=1;i<=DBl;i++)
            if(strcmp(q[i].u,iu)==0)
                if (strcmp(q[i].p,ip)==0)
                    {
                        printf("logging in...");
                        return 1;
                    }
                    else break;
        tl--;
        printf("Wrong username and password!\n");
        printf("Tries left: %d.\n",tl);
    }
    printf("Input blocked. Come back in 5 minutes!");

    return 0;
}