Reverse words in a sentence - PHP

Challenge: Reverse words in a given sentence without using split and join (or the like).

PHP

$str = "The lazy dog jumped over the fox";
$spaceCount = substr_count($str, " ");
$letterIndx = 0;

// count number of spaces and then loop
for($i=0; $i<=$spaceCount; $i++) {
  // get space positions
  $spaceIndx = strpos($str, " ", $letterIndx);
  // assign word by specifying start position and length
  if ($spaceIndx == 0) {
    $word = substr($str, $letterIndx);
  } else {
    $word = substr($str, $letterIndx, $spaceIndx - $letterIndx);
  }
  // push word into array
  $myArray[] = $word;
  // get first letter after space
  $letterIndx = $spaceIndx + 1;
}
// reverse the array
$reverse = array_reverse($myArray);
// echo it out
foreach($reverse as $rev) {
  echo $rev." ";
}

DEMO
http://codepad.org/chK5mNre

Here's the code if you use split and join (or the like)

PHP

$str = "The lazy dog jumped over the fox";
$myArray = str_word_count($str, 1);
$reverse = array_reverse($myArray);
foreach ($reverse as $rev) { echo $rev." "; }

DEMO
http://codepad.org/8ZvsvZzO