keep it simple stupid password generator function in php - read-friendly, quoted_printable safe, console safe and entropy level based password generation

kiss_password.php

<?php
function kiss_password( $entropy_level = 4, $length = 16 ) {
   /**   CC0 1.0 Universal License **/
   /**   Created: 2017 by Stefano Kocka **/
   /**   Purpose: Generates read-friendly, quoted_printable safe, console safe and entropy level based password **/
   /**   Caution: This function does not generate cryptographically secure values,
         and should not be used for cryptographic purposes. **/
   /**   Note: If you expect short as possible output
         with all 4 types of entropy then min $length=4 is recommended.
         For max there is no limit. **/
   /**   Note: I recommend to keep all $chars[*] at the same length for best possible results.  **/
   $chars = [
      'ABCDEFGHJKLMNPQRSTUVWXYZ', /**   1=24 **/
      '234567892345678923456789', /**   2=24 **/
      'abcdefghjklmnpqrstuvwxyz', /**   3=24 **/
      '!?$#!?$#!?$#!?$#!?$#!?$#' /**    4=24 **/
   ];
   for ( $i = 0; $i < $entropy_level; $i++ ) {
      $chars[ $i ] = str_shuffle( $chars[ $i ] );
      $chars[ $i ] = substr( $chars[ $i ], 0,
         ceil( $length / $entropy_level ) );
   }
   $chars = array_slice( $chars, 0, $entropy_level );
   $mix = str_shuffle( implode( $chars ) );
   if ( $length > strlen( $mix ) ) {
      $mix = str_pad( str_shuffle( $mix ), $length,
         str_shuffle( $mix ), STR_PAD_RIGHT );
   }
   return substr( str_shuffle( $mix ), 0, $length );
}
/** Example #1 kiss_password() example **/
echo kiss_password() . "\n";
echo kiss_password( 3 ) . "\n";
echo kiss_password( 4, 4 ) . "\n";
echo "\n";
echo kiss_password( 1 ) . "\n";
echo kiss_password( 2 ) . "\n";
echo kiss_password( 3 ) . "\n";
echo kiss_password( 4 ) . "\n";
echo "\n";
echo kiss_password( $entropy_level = 1, $length = 16 ) . "\n";
echo kiss_password( $entropy_level = 2, $length = 16 ) . "\n";
echo kiss_password( $entropy_level = 3, $length = 16 ) . "\n";
echo kiss_password( $entropy_level = 4, $length = 16 ) . "\n";
/** The above example will output something similar to:

xC$vg5Zd!$6U42#D
45cehV5MA67GN9Ty
p8?A

DCYAVWTNBLUQRFXM
CV325EG3XDA8767P
h6pwM5HR4j4W7XuV
5PdQ!E$#6sB7r5?t

AJUVLGSPQMZDYWRK
3Z4PBLT6Q22W85N7
qVdMxn7397RYJvA7
kq!M9Vv?c#E?257P

**/
?>