Write a simple PHP script that accepts a single word and URL that then returns the number of instances the word is found at the destination URL.

httpWordFinder.php

<?php
/**
 * This returns the amount of times
 * a $word is found in a string ($str)
 */
function wordsInString($word, $str) {
    // \b is for a word boundary, 
    // the i modifier is for case-insensitive matching
    // g is for global
    $regex = "/\b$word\b/i"; 
    preg_match_all($regex, $str, $matches);

    if(count($matches)) {
        return count($matches[0]);       
    }
    return 0;
}

/**
 * Write a simple PHP script that accepts a single word and URL 
 * that then returns the number of instances the word is found at the destination URL.
 */
function httpWordFinder($word, $url) {
    $res = file_get_contents($url);
    if($res) {
        return wordsInString($word, $res);
    }
    return 0;
}


// TESTS
assert(wordsInString('duck', 'duck this ducking duck') == 2);
assert(wordsInString('Great', 'great Great GReAT GReATER') == 3);
assert(httpWordFinder('function.get-magic-quotes-gpc.php', 'http://php.net/manual/en/function.assert.php') == 1);
?>