CSS Minification function

css-min.php

<?php

//Function for compressing the CSS as tightly as possible
function compress($buffer) {
    
    //Remove CSS comments
    $buffer = preg_replace('!/\*[^*]*\*+([^/][^*]*\*+)*/!', '', $buffer);
    
    //Remove tabs, spaces, newlines, etc.
    $buffer = preg_replace('`\s+`', ' ', $buffer);
    $replace = array(
     ' )' => ')',
     ') ' => ')',
     ' }' => '}',
     '} ' => '}',
     ' {' => '{',
     '{ ' => '{',
     ', ' => ',',
     ': ' => ':',
     '; ' => ';',
    );
    
    //Eradicate every last space!
    $buffer = trim(strtr($buffer, $replace));
    $buffer = str_replace('{ ', '{', $buffer);
    $buffer = str_replace('} ', '}', $buffer);
    
    return $buffer;
}