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本文实例为大家分享了英文单词统计器php 实现,供大家参考,具体内容如下
程序开始运行, 按"浏览"钮选择一个英文文档, 再按"统计 Statistics"钮, 即可得到按字母顺序列出的所有单词,及其出现的次数
用于测试的数据文档: data.txt
驱动程序:word.php
output.php 和 StringTokenizer.php 是 要求在同一个文件夹中的程序
1. words_statistics_PHP.png

2. word.php
td{
background-color:#CF6;
width:100px;
margin:5px;
}
0)
echo "Error: " . $_FILES["file"]["error"] . "
";
else {
$myfile = fopen($_FILES["file"]["tmp_name"], "r") or die("Unable to open file!");
$str = fread($myfile,filesize($_FILES["file"]["tmp_name"]));
$delim = "?\\,. /:!\"()\t\n\r\f%";
$st = new StringTokenizer($str, $delim);
echo '找到字符串: '.$st->countTokens();
$list=new LinkedList();
while ($st->hasMoreTokens()) {
$list->orderInsert($st->nextToken());
}
$list->words_count();
$list->traversal();
fclose($myfile);
}
}
?>
英文文档单词统计 Statistics on English words
程序开始运行, 按"浏览"钮选择一个英文文档, 再按"统计 Statistics"钮,
即可得到按字母顺序列出的所有单词,及其出现的次数
英文文档名 File Name:
3. output.php
data = $data; //英文字符串
$this->next = $next; //指向后继结点的指针
$this->frequency=$frequency; //英文字符串出现的次数
}
}
class LinkedList{
private $head; //单链表的头结点,不存储数据
function __construct(){//单链表的构造方法
//头结点的数据为"傀儡", 不代表 任何数据
$this->head = new Node("dummy 傀儡");
$this->first = null;
}
function isEmpty(){
return ($this->head->next == null);
}
/* orderInsert($data) 方法,
* 按给定字符串 $data 的大小, 将其安插到适当的位置,
* 以保证单链表中字符串的存储,始终是有序的。
*/
function orderInsert($data){
$p = new Node($data);
if($this->isEmpty()){
$this->head->next = $p;
}
else {
$node= $this->find($data);
if(!$node){
$q = $this->head;
while($q->next != NULL && strcmp($data, $q->next->data)> 0 ){
$q = $q->next;
}
$p->next = $q->next;
$q->next = $p;
}else
$node->frequency++;
}
}
function insertLast($data){//将字符串插到单链表的尾部
$p = new Node($data);
if($this->isEmpty()){
$this->head->next = $p;
}
else{
$q = $this->head->next;
while($q->next != NULL)
$q = $q->next;
$q->next = $p;
}
}
function find($value){//查询是否有给定的字符串
$q = $this->head->next;
while($q->next != null){
if(strcmp($q->data,$value)==0){
break;
}
$q = $q->next;
}
if ($q->data == $value)
return $q;
else
return null;
}
function traversal(){//遍历单链表
if(!$this->isEmpty()){
$p=$this->head->next;
echo "输出结果:";
echo "".$p->data."
出现次数:".$p->frequency."";
$n=1;
while($p->next != null){
$p=$p->next;
echo "".$p->data."
出现次数:".$p->frequency."";
$n++;
if ($n%11==0) echo "";
}
echo "";
}else
echo "链表为空!";
}
function words_count(){
if($this->isEmpty())
echo "
没有储存字符串
";
else{
$counter=0;
$p=$this->head->next;
while($p->next != null){
$p=$p->next;
$counter++;
};
echo "***共有单词 ".$counter." 个***";
}
}}
?>
4. StringTokenizer.php
* countTokens().'
';
* while ($st->hasMoreTokens()) {
* echo $st->nextToken() . '
';
* }
* prints the following output:
* Total tokens: 4
* this
* is
* a
* test
* ?>
*
*/
class StringTokenizer {
/** @var string
*/
private $string;
/** @var string
*/
private $token;
/** @var string
*/
private $delim;
/**
* Constructs a string tokenizer for the specified string.
* @param string $str String to tokenize
* @param string $delim The set of delimiters (the characters that separate tokens)
* specified at creation time, default to " \n\r\t\0"
*/
public function __construct($str, $delim=" \n\r\t\0") {
$this->string = $str;
$this->delim = $delim;
$this->token = strtok($str, $delim);
}
/**
* Destructor to prevent memory leaks
*/
public function __destruct() {
unset($this);
}
/**
* Calculates the number of times that this tokenizer's nextToken method can
* be called before it generates an exception
* @return int - number of tokens
*/
public function countTokens() {
$counter = 0;
while($this->hasMoreTokens()) {
$counter++;
$this->nextToken();
}
$this->token = strtok($this->string, $this->delim);
return $counter;
}
/**
* Tests if there are more tokens available from this tokenizer's string. It
* does not move the internal pointer in any way. To move the internal pointer
* to the next element call nextToken()
* @return boolean - true if has more tokens, false otherwise
*/
public function hasMoreTokens() {
return ($this->token !== false);
}
/**
* Returns the next token from this string tokenizer and advances the internal
* pointer by one.
* @return string - next element in the tokenized string
*/
public function nextToken() {
$hold = $this->token; //hold current pointer value
$this->token = strtok($this->delim); //increment pointer
return $hold; //return current pointer value
}
}
?>
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。
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