Getting user input with optional hide from view

/**
 * Description
 * This function will request the user's password via the command prompt
 * Credit to: <http://marc.info/?l=php-internals&m=117442143122154>
 *
 * Arguments
 * $prompt - string (required). The text for the prompt
 *
 * Examples
 * $password = getUserInput('Enter password: ');
 *
 * Returns string
 */
function getUserInput($prompt, $hideInput = false)
{
 $displayInput = '';
 if ($hideInput === true) {
 $displayInput = ' -echo';
 }

 $ostty = `stty -g`;
 system('stty' . $displayInput . ' icanon min 1 time 0 2>/dev/null || stty' . $displayInput . ' cbreak');

 echo $prompt . ': ' . ' ';

 // Get rid of newline when reading stdin
 $r = substr(fgets(STDIN), 0, -1);

 // echo PHP_EOL;
 system('stty ' . $ostty);

 if ($hideInput === true) {
 echo PHP_EOL;
 }

 return $r;
}

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