Remove previous element from array if statement == true

Question

I have a foreach loop that iterates through an array but I want to check if the array contains $item == 'survey-east-upper' and if that's true then hide the previous $item which is 'survey-east'. I've looked into in_array but can't figure how to remove the previous element.

My original code:

foreach ($survey_array->Services as $service) {
  foreach ($service as $item) {
    echo '<li title="' . rtrim($item) . '" class="' . strtolower(preg_replace('/[^a-zA-Z0-9]/', '-', rtrim($item))) . '">' . $item . '</li>';
    }
  }

The new code:

foreach ($survey_array->Services as $service) {
  foreach ($service as $item) {
    if (in_array("survey-east-upper", $survey_array->Services)) {
       unset($site->Services['survey-east']);
    }
    echo '<li title="' . rtrim($item) . '" class="' . strtolower(preg_replace('/[^a-zA-Z0-9]/', '-', rtrim($item))) . '">' . $item . '</li>';
    }
  }

How can I accomplish this?

Answer 1

Dont use foreach, use for with indexing. In every iteration, look one item ahead and check that item. If its "survey-east-upper", skip actual iteration and continue further.

foreach ($survey_array->Services as $service) {
  for ($i = 0; $i < count($service) - 1; $i++) {
    $item = $service[$i];
    if ($service[$i + 1] == "survey-east-upper") {
         continue;
    }
    echo '<li title="' . rtrim($item) . '" class="' . strtolower(preg_replace('/[^a-zA-Z0-9]/', '-', rtrim($item))) . '">' . $item . '</li>';
    }

  }

Edit:

You have to do something with last item in array $service[count($service) - 1], because that wont be included in for loop