<?php

function randword ()
{
  $word     = "";

  $size = rand (3, 20);
  for ($i = 0; $i < $size; $i++) {
    $randchr  = chr (rand (ord ('a'), ord('z')));
    $word    .= $randchr;
  }

  return $word;
}

srand (0);
mt_srand (0);

################################################
# NUMBER OF WORDS TO GENERATE FOR THE TEST
# (change following line)
################################################
$number_of_words = 1000;

$randwords = array();
for ($i = 0; $i < $number_of_words; $i++) {
  array_push ($randwords, randword());
}

echo "<?php\n";
?>
function randword ()
{
  $word     = "";

  $size = rand (3, 20);
  for ($i = 0; $i < $size; $i++) {
    $randchr  = chr (rand (ord ('a'), ord('z')));
    $word    .= $randchr;
  }

  return $word;
}

$total        = 100000;

$switch_start = microtime (TRUE);
srand (0);
<?php
echo 'for ($i = 0; $i < $total; $i++) {' . "\n";
echo '  switch (randword()) {' . "\n";
for($i = 0; $i < count($randwords); $i++) {
  echo '    case "' . $randwords[$i] . '": $ret = ' . $i . " ; break; \n";
}
echo '    default: $ret = -1; break;' . "\n";
echo "  }\n";
echo "}\n";
?>
$switch_end = microtime (TRUE);

<?php
echo "\$asoc = array(\n";
for($i = 0; $i < count($randwords); $i++) {
  echo '  "' . $randwords[$i] . '" => ' . $i . ",\n";
}
echo ");\n";
?>

srand (0);
$array_start = microtime (TRUE);
for ($i = 0; $i < $total; $i++) {
  $randw = randword();
  if (!array_key_exists ($randw, $asoc)) { $ret = -1; }
  else { $ret = $asoc[$randw]; }
}
$array_end = microtime (TRUE);

echo "Total Iterations: $total\n";
echo "Switch Total Time: " . ($switch_end - $switch_start) . " ms\n";
echo "Array Total Time: " . ($array_end - $array_start) . " ms\n";