<?php
if (!is_front_page()) && (!is_single()) && (!is_page())
echo "<a href='http://chusmix.com/'>Cambiar Imagen</a>";
?>
It's actually the elseif of a bigger if but I tried to do separately trying to increase my chances of making it work. The bigger statement is this one, all works except the elseif:
<?php
$res= get_search_query();
$image_path = 'Imagenes/grupos/' . substr(get_search_query(), 1) . '.jpg';
if (file_exists($image_path)) {
echo "<img src='http://chusmix.com/Imagenes/grupos/".substr(get_search_query(), 1). ".jpg'>";
echo "<a style='padding-left:180px;' href='http://chusmix.com/'>Cambiar Imagen</a>";
echo "<hr style='border: 0;'>";
}
elseif (!is_front_page()) && (!is_single()) && (!is_page())
echo "<a href='http://chusmix.com/'>Cambiar Imagen</a>";
?>
You're missing an outer set of parentheses:
elseif ((!is_front_page()) && (!is_single()) && (!is_page()))
You can leave out each individual pair that surrounds the function names though to make it look cleaner:
elseif (!is_front_page() && !is_single() && !is_page())