Stop if word is found?

Hi! I am searching some files for a word and if word is found I will stop the script. I tried with die, but I have never used it before and it didn´t work perhaps I used it in a wrong way.. $fd = fopen($filename1, "r"); $string = fread($fd, filesize($filename1)); $fruits = explode (" ", $string); fclose($fd); while (list ($key, $val) = each ($fruits)) { if (eregi("$word", $val)) { print "$filename1".",".$key; } } $fd = fopen($filename2, "r"); $string = fread($fd, filesize($filename2)); $fruits = explode (" ", $string); fclose($fd); while (list ($key, $val) = each ($fruits)) { if (eregi("$word", $val)) { print "$filename2".",".$key; } } ------ If I put in a word wich is found in both files than I got two answers but I only wan´t to know the first one. Can I prevent it to run if the word is found in file1? Thanks in advance for helping me. Regards Jan