01c12-1.php

来自「介绍PHP5的给类型函数应用」· PHP 代码 · 共 43 行

<?php
// A function to return a count of all words used in the string
function full_count_words($str) {
	// Use str_word_count passing it a '1' so it breaks words out for us
	$words = str_word_count($str, 1);
	
	// Loop over all elements of this array forming a new array that uses
	// the word as a key and counts how many times each one is found
	$results = array();
	foreach ($words as $w) {
		// Convert the entire word to lowercase,
		//  so that 'The' and 'the' will still match
		$lw = strtolower($w);
		// If it's the first time we have seen this word,
		//  add it to the array, else increment it
		if (!(isset($results[$lw]))) {
			$results[$lw] = 1;
		} else {
			$results[$lw]++;
		}
	}
	
	// We now have the count we wanted, return it
	return $results;
}

$test_string = "There are many top secret chemical compounds that we are
trying to keep a secret from the director of the institute.  Perhaps the
secret society could hold a meeting and ask all the members to attend and
discuss this issue.";

// Determine the word count:
$wordcount = full_count_words($test_string);

// First echo out the number of times the word 'secret' is used:
// prints: The word secret was used 3 times.
echo '<pre>';
echo "The word secret was used {$wordcount['secret']} times.\n\n";

// Now go ahead and echo out the entire array:
print_r($wordcount);
echo '</pre>';
?>