generate_random_passwords.php

<?php

function random_passwords($length,$count,$characters) {
 
// $length - the length of the generated password(s)
// $count - number of passwords to be generated
// $characters - types of characters to be used in the password
 
// define variables used within the function    
  $symbols = [];
  $passwords = [];
  $use_chars = '';
 
// an array of different character types    
  $chars["lower_case"] = 'abcdefghijklmnopqrstuvwxyz';
  $chars["upper_case"] = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
  $chars["numbers"] = '1234567890';
  $chars["special_symbols"] = '!?~@#-_$+=';
 
  $characters = explode(",",$characters); // get characters types to be used for the passsword
  foreach ($characters as $key=>$value) {
    $use_chars .= $chars[$value]; // build a string with all characters
  }
  $chars_length = strlen($use_chars) - 1; // strlen starts from 0 to get number of characters deduct 1

  for ($p = 0; $p < $count; $p++) {
    $pass = '';
    for ($i = 0; $i < $length; $i++) {
        $n = rand(0, $chars_length); // get a random character from the string with all characters
        $pass .= $use_chars[$n]; // add the character to the password string
    }
    $passwords[] = $pass;
  }

  return $passwords; // return the generated passwords
}
// usage  
$passwords = random_passwords(32,5,"lower_case,upper_case,numbers,special_symbols");
foreach($passwords as $pass) {
  echo $pass, "\n";
}

license.txt

Copyright 2018 Hendrik Eduard Kuiper

Permission is hereby granted, free of charge, to any person obtaining a 
copy of this software and associated documentation files (the "Software"), 
to deal in the Software without restriction, including without limitation 
the rights to use, copy, modify, merge, publish, distribute, sublicense, 
and/or sell copies of the Software, and to permit persons to whom the 
Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in 
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESSED 
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 
SOFTWARE.

Don't generate passwords/tokens using rand(), they're insecure and predictable in a way. rand() is not a cryptographically secure pseudo random number generator (CSPRNG). Here's a piece about cracking rand() seeds and once cracked you can generate same passwords.

Since PHP 7.1 rand() is an alias to mt_rand() so here's mt_rand() seed cracker too.

You need to use cryptographically secure random numbers so they're not predictable. You can generate them using random_bytes() or random_int().

Don't use rand(), mt_rand(), uniqid(), time() etc. for generating tokens or passwords.