concrete/src/Page/Page.php
public function isCheckedOut()
    {
        // function to inform us as to whether the current collection is checked out
        $db = Database::connection();
        if (isset($this->isCheckedOutCache)) {
            return $this->isCheckedOutCache;
        }

        $q = "select cIsCheckedOut, cCheckedOutDatetimeLastEdit from Pages where cID = '{$this->cID}'";
        $r = $db->executeQuery($q);

        if ($r) {
            $row = $r->fetchRow();
            // If cCheckedOutDatetimeLastEdit is present, get the time span in seconds since it's last edit.
            if (! empty($row['cCheckedOutDatetimeLastEdit'])) {
                $dh = Core::make('helper/date');
                $timeSinceCheckout = ($dh->getOverridableNow(true) - strtotime($row['cCheckedOutDatetimeLastEdit']));
            }

            if ($row['cIsCheckedOut'] == 0) {
                return false;
            } else {
                if (isset($timeSinceCheckout) && $timeSinceCheckout > CHECKOUT_TIMEOUT) {
                    $this->forceCheckIn();
                    $this->isCheckedOutCache = false;

                    return false;
                } else {
                    $this->isCheckedOutCache = true;

                    return true;
                }
            }
        }
    }
public function isCheckedOut()
    {
        // function to inform us as to whether the current collection is checked out
        $db = Database::connection();
        if (isset($this->isCheckedOutCache)) {
            return $this->isCheckedOutCache;
        }

        $q = "select cIsCheckedOut, cCheckedOutDatetimeLastEdit from Pages where cID = '{$this->cID}'";
        $r = $db->executeQuery($q);

        if ($r) {
            $row = $r->fetchRow();
            // If cCheckedOutDatetimeLastEdit is present, get the time span in seconds since it's last edit.
            if (! empty($row['cCheckedOutDatetimeLastEdit'])) {
                $dh = Core::make('helper/date');
                $timeSinceCheckout = ($dh->getOverridableNow(true) - strtotime($row['cCheckedOutDatetimeLastEdit']));
            }

            if ($row['cIsCheckedOut'] == 0) {
                return false;
            } else {
                if (isset($timeSinceCheckout) && $timeSinceCheckout > CHECKOUT_TIMEOUT) {
                    $this->forceCheckIn();
                    $this->isCheckedOutCache = false;

                    return false;
                } else {
                    $this->isCheckedOutCache = true;

                    return true;
                }
            }
        }
    }
public function isCheckedOut ( ) { // function to inform us as to whether the current collection is checked out $ db = Database :: connection ( ) ; if ( isset ( $ this -> isCheckedOutCache ) ) { return $ this -> isCheckedOutCache ; } $ q = "select cIsCheckedOut, cCheckedOutDatetimeLastEdit from Pages where cID = '{$this->cID}'" ; $ r = $ db -> executeQuery ( $ q ) ; if ( $ r ) { $ row = $ r -> fetchRow ( ) ; // If cCheckedOutDatetimeLastEdit is present, get the time span in seconds since it's last edit. if ( ! empty ( $ row [ 'cCheckedOutDatetimeLastEdit' ] ) ) { $ dh = Core :: make ( 'helper/date' ) ; $ timeSinceCheckout = ( $ dh -> getOverridableNow ( true ) - strtotime ( $ row [ 'cCheckedOutDatetimeLastEdit' ] ) ) ; } if ( $ row [ 'cIsCheckedOut' ] == 0 ) { return false ; } else { if ( isset ( $ timeSinceCheckout ) && $ timeSinceCheckout > CHECKOUT_TIMEOUT ) { $ this -> forceCheckIn ( ) ; $ this -> isCheckedOutCache = false ; return false ; } else { $ this -> isCheckedOutCache = true ; return true ; } } } }
Is the page checked out?

@return bool|null returns NULL if the page does not exist, a boolean otherwise
Is the page checked out?