PHP から Mecab を使うコード

mecab_test.php

<?php
$text = $argv[1];
$mecab = new Mecab();

$keywords = array();
$nodes = $mecab->parseToNode($text);
foreach ($nodes as $node) {
  if ($node->posid >= 37 && $node->posid <= 66) {
    if (isset($keywords[$node->surface])) {
      $keywords[$node->surface]++;
    } else{
      $keywords[$node->surface] = 1;
    }
  }
}
arsort($keywords);
print_r($keywords);
?>

$ php mecab_test.php <sentence>