Count how often the word occurs in the text in PHP

In php I need to Load a file and get all of the words and echo the word and the number of 开发者_如何学JAVAtimes each word shows up in the text, (I also need them to show up in descending order most used words on top) ★✩

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Here's an example:

$text = "A very nice únÌcÕdë text. Something nice to think about if you're into Unicode.";

// $words = str_word_count($text, 1); // use this function if you only want ASCII
$words = utf8_str_word_count($text, 1); // use this function if you care about i18n

$frequency = array_count_values($words);

arsort($frequency);

echo '<pre>';
print_r($frequency);
echo '</pre>';

The output:

Array
(
    [nice] => 2
    [if] => 1
    [about] => 1
    [you're] => 1
    [into] => 1
    [Unicode] => 1
    [think] => 1
    [to] => 1
    [very] => 1
    [únÌcÕdë] => 1
    [text] => 1
    [Something] => 1
    [A] => 1
)

And the utf8_str_word_count() function, if you need it:

function utf8_str_word_count($string, $format = 0, $charlist = null)
{
    $result = array();

    if (preg_match_all('~[\p{L}\p{Mn}\p{Pd}\'\x{2019}' . preg_quote($charlist, '~') . ']+~u', $string, $result) > 0)
    {
        if (array_key_exists(0, $result) === true)
        {
            $result = $result[0];
        }
    }

    if ($format == 0)
    {
        $result = count($result);
    }

    return $result;
}

---

$words = str_word_count($text, 1);
$word_frequencies = array_count_values($words);
arsort($word_frequencies);
print_r($word_frequencies);

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This function uses a regex to find words (you might want to change it, depending on what you define a word as)

function count_words($text)
{
    $output = $words = array();
    preg_match_all("/[A-Za-z'-]+/", $text, $words); // Find words in the text

    foreach ($words[0] as $word)
    {
        if (!array_key_exists($word, $output))
            $output[$word] = 0;

        $output[$word]++; // Every time we find this word, we add 1 to the count
    }

    return $output;
}

This iterates over each word, constructing an associative array (with the word as the key) where the value refers to the occurences of each word. (e.g. $output['hello'] = 3 => hello occured 3 times in the text).

Perhaps you might want to change the function to deal with case insensitivity (i.e. 'hello' and 'Hello' are not the same word, according to this function).

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echo count(explode('your_word', $your_text));