php - Remove previous element from array if statement == true -

i have foreach loop iterates through array want check if array contains $item == 'survey-east-upper' , if that's true hide previous $item 'survey-east'. i've looked in_array can't figure how remove previous element.

my original code:

foreach ($survey_array->services $service) {   foreach ($service $item) {     echo '<li title="' . rtrim($item) . '" class="' . strtolower(preg_replace('/[^a-za-z0-9]/', '-', rtrim($item))) . '">' . $item . '</li>';     }   } 

the new code:

foreach ($survey_array->services $service) {   foreach ($service $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 accomplish this?

dont use foreach, use indexing. in every iteration, 1 item ahead , check item. if "survey-east-upper", skip actual iteration , continue further.

foreach ($survey_array->services $service) {   ($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 last item in array $service[count($service) - 1], because wont included in loop