<?php

function removeAccents($stripAccents){
  return strtr($stripAccents,'àáâãäçèéêëìíîïñòóôõöùúûüýÿÀÁÂÃÄÇÈÉÊËÌÍÎÏÑÒÓÔÕÖÙÚÛÜÝ','aaaaaceeeeiiiinooooouuuuyyAAAAACEEEEIIIINOOOOOUUUUY');
}

function filtrarNumeros($texto){
	return filter_var($texto, FILTER_SANITIZE_NUMBER_INT);
}

$qt = "rand(1, 99)";
$qt = strtolower(removeAccents($qt));
$sndline = "Random number";

if (($qt == "rand") or ($qt == "random")){
    $result = rand(1, 9999);
    echo $result . "\n";
}
elseif (filtrarNumeros((strstr($qt, 'rand')) !== false) or (filtrarNumeros(strstr($qt, 'random')) !== false)){
	$tok = strtok($qt, ",");
	$min = filtrarNumeros($tok);
	$max = filtrarNumeros(strtok(','));
	$result = rand($min, $max);
	echo $result . "\n";
}
else{
	//....
}