array_map() with multiple callback functions

Hi all. I want to apply strtolower() AND trim() to all items in an array. But I don't see a way to call multiple callbacks with the array_map() function. Are my two choices the following: // 1) nesting two array_map() calls $cleanData = array_map('trim',(array_map('strtolower',$rawData))); // 2) call my own function with array_walk() $cleanData = array_walk('myCleaner',$rawData); function myCleaner($passedData){ $cleanData = array_map('strtolower',$passedData); $cleanData = array_map('trim',$cleanData); } //(Of course, wouldn't bother with a function, just to call array_map twice...) Just seeing if there's a better way than having to go through the array twice to apply each callback separately. Thanks,