leach() = "legacy each": php72 compat for deprecated each(). Use to refactor tired third party libs, when not performance critical.

leach.php

<?php

/**                                                                                                                                                           
 * leach() = "legacy each"                                                                                                                                    
 *                                                                                                                                                            
 * replacement for deprecated each() for php7.2                                                                                                               
 * use this if refactoring would be too painful and performance is not relevant                                                                               
 *                                                                                                                                                            
 */
function leach(&$arr)
{
  $k = key($arr);
  if ($k === null)
  {
    // https://secure.php.net/manual/en/function.each.php                                                                                                     
    // If the internal pointer for the array points past the end of                                                                                           
    // the array contents, each() returns FALSE.                                                                                                              
    return false;
  }
  else
  {
    $v = current($arr);

    // After each() has executed, the array cursor will be left on the                                                                                        
    // next element of the array, or past the last element if it hits the                                                                                     
    // end of the array.                                                                                                                                      
    next($arr);

    // Returns the current key and value pair from the array                                                                                                  
    // array. This pair is returned in a four-element array, with the                                                                                         
    // keys 0, 1, key, and value. Elements 0 and key contain the key                                                                                          
    // name of the array element, and 1 and value contain the data.                                                                                           
    return [
      1 => $v,
      'value' => $v,
      0 => $k,
      'key' => $k
    ];
  }
}