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i have problem with php, i meka a php script under window when i uploade it to asus and see with nano i dont have in it php script

this is my script

<?php

if (File_Exists ("../data/192.168.1.21.in.txt")):

$vypis=0;

$vypis=file("../data/192.168.1.21.in.txt");

$riadok=1;

$mb=$vypis$riadok?/1024;

echo round($mb, 2);

endif;

?>

but in asus see only this

1901

i have intall php-thttpd