Passing variable from preprocess block to the block body

Question

There is a block which its body is produced by PHP Code. I need to set a variable before loading the block and use it in it. This is my code

function THEME_preprocess_block(&$variables){
    $variables['var']="some text";
}

when I open the block configuration page and in its body I write

<?php print $var;?>

it prints nothing. How do I can pass variable from block template page in to the block body in the block configuration page?

Answer 1

Your variable will be available in block.tpl.php. Consider making your own block like described on How to theme a custom block?. (You probably do not need hook_theme().)

Using PHP directly in blocks (via UI) is not the best practice: It slows your site down, as the block needs to be rendered with every request, when it comes to caching.