Get all occurrences of substring

function tkt_get_contents($str, $startDelimiter, $endDelimiter) {
  $contents = array();
  $startDelimiterLength = strlen($startDelimiter);
  $endDelimiterLength = strlen($endDelimiter);
  $startFrom = $contentStart = $contentEnd = 0;
  while (false !== ($contentStart = strpos($str, $startDelimiter, $startFrom))) {
    $contentStart += $startDelimiterLength;
    $contentEnd = strpos($str, $endDelimiter, $contentStart);
    if (false === $contentEnd) {
      break;
    }
    $contents[] = substr($str, $contentStart, $contentEnd - $contentStart);
    $startFrom = $contentEnd + $endDelimiterLength;
  }

  return $contents;
}

Use it like so:

$string = 'any string with any repetitive html or else valid text content such as this example';
$start = '';
$end = '';
$matches_array = tkt_get_contents($string, '', '');
print_r($matches_array);

This will produce:

Array
(
    [0] => with
    [1] => else
)