问PHP:为什么else-block不起作用？

EN

<form action="" method="POST">
    <input id="delete" name="delete" placeholder="Name" type="text"></b>
    <input type="submit" name="deleteButton" value="Go!">
</form>

<?php
if (isset($_POST['deleteButton'])) {
    $temp = $_POST['delete'];
    $deleteSQL = "DELETE FROM `berater` WHERE `Nachname` LIKE '$temp' OR `Vorname` LIKE '$temp' OR CONCAT(Vorname,' ', Nachname) LIKE '%$temp%'";
    $searchSQL = "SELECT FROM `berater` WHERE `Nachname` LIKE '$temp' OR `Vorname` LIKE '$temp' OR CONCAT(Vorname,' ', Nachname) LIKE '%$temp%'";
    $search = mysqli_query($db_link, $searchSQL);
    $loeschen = mysqli_query($db_link, $deleteSQL);

    if (!$search) {
        echo "Kein Datensatz gefunden!";
    } else {
        echo "$temp erfolgreich gelöscht.";
    }
}