PHP统计字符串里单词出现的次数

PHP统计字符串里单词出现次数

<?
function full_count_words($str) {
//返回完整数组，包含字符串里每个单词

$words = str_word_count($str,1);
$result = array();
foreach ($words as $w) {
$lw = strtolower($w);
//判断单词是否是第一次出现，是则设置为1，否则就增加1

if (!(isset($result[$lw]))) {
$result[$lw] = 1;
} else {
$result[$lw]++;
}
}
return $result;
}

?>

函数描述及例子

<?
$test = "Good luck to you,good by! me to ,good ,good";
$wordcount = full_count_words($test);
//echo $wordcount['good'];

print_r($wordcount);
?>