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Create array using range, shuffle it and build HTML

<?php
function _shuffle($min, $max) {
  $output = range($min, $max); // create an array containing a range of elements
  shuffle($output); // shuffle array
return $output; // returns an array
}
     
    $k = _shuffle(1 ,7);
    // print_r($k);
    
    foreach ($k as $key => $value) {
      echo '<img src="./images/' .  $value . '.jpg" alt="" />' . "\n";
    }
?>