Foreach循环没有做它看起来应该的样子 - 或者它可能是在被调用的函数中？ PHP

public function delete($messageID) {
    $type = $this->findType($messageID);
    if ($type == 'in') {
        foreach ($this->inArr as $key => $value) {
            if ($this->inArr[$key]->messageID != $messageID)
                $implodeData[$key] = $this->inArr[$key]->messageID;
            }
        if (!isset($implodeData))
            $imploded = '0';
        else
            $imploded = implode(',', $implodeData);
        $result = $this->_database->updatePMUser('inArr', $imploded, 'UID', $this->UID);
        $result2 = $this->_database->deletePM('messageID', $messageID);
        return;
        }
    else {
        foreach ($this->sentArr as $key => $value) {
            if ($this->sentArr[$key]->messageID != $messageID)
                $implodeData[$key] = $this->sentArr[$key]->messageID;
            }
        if (!isset($implodeData))
            $imploded = '0';
        else
            $imploded = implode(',', $implodeData);
        $result = $this->_database->updatePMUser('sentArr', $imploded, 'UID', $this->UID);
        $result2 = $this->_database->deletePM('messageID', $messageID);
        return;
        }
    }

private function _processSelectedSent() {
    $pmObj = unserialize(base64_decode($_POST['pmObj']));
    $i=1;
    foreach ($_POST as $key => $value) {
        if ($value == 'marked') {
            $checkedArray[$i] = $key;
            $i++;
            }
        }
    if ($_POST['submitter'] == 'Delete Selected') {
        if (is_array($checkedArray)) {
            foreach ($checkedArray as $key => $value)
                $pmObj->delete($value);
            }
        else
            $pmObj->delete($checkedArray[1]);
        header("Location: ".HOME_PAGE.PM_PAGE."?view=sentbox&nocache=".time());
        }
    }