Usar finally para ejecutar código de forma diferida: http://www.kroatoan.es/articulos/ejecucion-diferida-php-usando-finally/

exec-defer-finally.php

<?php

$handle = fopen($location, 'r+');

if ($handle === false) {  
    return false;
}

$firstLine = fgets($handle, 1024);

if ( ! $firstLine) {  
   fclose($handle);

   return false;
}

//Do Something with firstline of file

fclose($handle);

return $firstLine;