<?php
$test = "AdamsKevin35";
function stringrpl($vitrichen,$kituchen,$str)
    {
        $out = "";
        $temp = substr($str,$vitrichen);
        $out = substr_replace($str,"$kituchen",$vitrichen);
        $out .= $temp;
        return $out;
    }
function chen($text, $char, $vitri)
    {
        $text1 = "";
        $text1 = stringrpl($vitri,".",$text);
        return $text1;
    } 
        $tong = strlen ($test);
        $stt = 1;
        $file = fopen("C:\Program Files (x86)\VertrigoServ\www\chuoi\gmail_mul.txt",'w');
     
        for ($i = 1; $i < $tong; $i++)
        {
            $test1 = chen($test, ".", $i);
            //echo $test1."</br>";
            $string = $test1."@gmail.com";
            fwrite($file,$string);
            fwrite($file, "\r\n");
            //fclose($file);
            //exit;
        }
     
        for ($i = 1; $i < $tong - 1; $i++)
        {
            $test1 = chen($test, ".", $i);
            //echo $test1."</br>";
            for($b = $i + 2; $b <= $tong; $b++ )
                {
                    $test2 = chen($test1, ".", $b);
                    //echo $stt++."/";
                    //echo $test2."@gmail.com</br>";
                    $string = $test2."@gmail.com";
                    fwrite($file,$string);
                    fwrite($file, "\r\n");
                }
        }
        fclose($file);
        echo "successful!"
?>