php encrypt script based on string time character replace .runs on cli

gistfile1.php

<?php
/* 
  this is a simple encrypt script based on string character replace,
  it also replace some characters based on seconds from time date('U') command,
  so the output will be almost different every time the program runs 

  And its working only from command line interface
*/

error_reporting(E_ALL ^ (E_NOTICE | E_WARNING)); //disabled error reporting
echo ' |--------welcome to Protectsoft---------|-->'.exec('whoami')."\n";
fwrite(STDOUT, "enter your keyword: ");
$passwd = trim(fgets(STDIN));

$unix = date('U');
 if ($unix[9] == 0) {
  $unix[9] = 2;
}

$replace = array(       //basic replace array table
        'b' => '|.',
        'c' => 'v',                
        'f' => 'g',
        'g' => 'h',               
        'j' => 'k',
        'k' => '|<',
        'l' => 'a',
        'm' => 'z',               
        'p' => 'q',
        'q' => 'w',
        'r' => 't',
        's' => 'd',                
        'v' => 'b',
        'w' => '|v|',
        'x' => 'c',
        'y' => 'u',
        'z' => 'x',
        '1' => 'l',
        '2' => 'z',
        '3' => '3',
        '4' => '@',
        '5' => '$',
        '6' => 'G',
        '7' => 't',
        '8' => 'b',
        '9' => 'g',
        '/' => '|',
                   );

$letters = array(    //replace array table based on seconds 1 to 9
  '1' => 'a',
  '2' => 'D',
  '3' => 'e',
  '4' => 'h',
  '5' => 'i',
  '6' => 'n',
  '7' => 'o',
  '8' => 't',
  '9' => 'u',
              );

$passwd = str_replace(array_keys($replace),array_values($replace),$passwd);


$out = $passwd[0].($unix[9] * 2).$passwd[1].$unix[1].$passwd[2].($unix[9] * 3).$passwd[3].$unix[3].$passwd[4].($unix[9] * 2).$passwd[5].$unix[5].$passwd[6].($unix[9] * 2).$passwd[7].$passwd[8];  //the output. Maybe it will be better without the unix[9] * number.just did this for the output to have some random numbers in

for ($num = 1, $max = 9; $num < $max; $num++)
 if ($unix[9] == $num) {
  $out[$num] = $letters[$num + 1];
 }



fwrite(STDOUT, "this is your encrypted keyword: $out  \n");
echo ' |------------Protectsoft-Protectron------------|', "\n"; 


?>