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如何使用php英文单词统计器?

2016-08-18 16:43:20 来源:www.45fan.com 【

如何使用php英文单词统计器?

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

如何使用php英文单词统计器?

2. word.php

<html>
<style>
td{
 background-color:#CF6;
 width:100px;
 margin:5px;
}
</style>
<body>
<?php
/**
 * 程序开始运行, 按"浏览"钮选择一个英文文档, 再按"统计"钮,
 * 即可得到按字母顺序列出的所有单词,及其出现的次数
 * 
 * 作者: 许同春 author Tongchun Xu 
 * @开源中国 Open Source, Chna communiity
 * 完成日期:2016年6月10日 completion date: 10 June, 2016
 */
 
require("StringTokenizer.php");
require("output.php");
 if($_POST['submit']){
 if ($_FILES["file"]["error"] > 0)
 echo "Error: " . $_FILES["file"]["error"] . "<br />";
 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);
 }
}
?>
<h2>英文文档单词统计 Statistics on English words </h2>
<p>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 </p>
 
<form action="word.php" method="post"
enctype="multipart/form-data">
<label for="file">英文文档名 File Name:</label>
<input type="file" name="file" id="file" /> 
<input type="submit" name="submit" value="统计 Statistics" />
</form>
</body>
</html>

3. output.php

<meta charset="utf-8" />
<?
/**
 * The class LinkedList allows an application to store strings in
 * alphabetical order by calling orderInsert().
 * 此处定义的 LinkedList 类,可以调用它的 方法 orderInsert(),来以字母
 * 大小的顺序储存 英文字符串。
 * 同时记录 英文单词出现的次数
 * 作者: 许同春 author Tongchun Xu 
 * @开源中国 Open Source, China communiity
 * 完成日期:2016年6月10日 completion date: 10 June, 2016
 */
class Node{
 public $data;
 public $frequency;
 public $next;
 function __construct($data, $next = null, $frequency = 1){
  $this->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:<table><tr>";
  echo "<td>".$p->data."<br>出现次数:".$p->frequency."</td>";
  $n=1;
  while($p->next != null){
   $p=$p->next;
   echo "<td>".$p->data."<br>出现次数:".$p->frequency."</td>";
   $n++;
   if ($n%11==0) echo "</tr><tr>";
   }
    
   echo "</tr></table>";   
  }else
  echo "链表为空!";
 }
  
  
 function words_count(){
 if($this->isEmpty())
 echo "<br>没有储存字符串 <br>";
  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

<?php
 
/**
 * The string tokenizer class allows an application to break a string into tokens.
 *
 * @author Azeem Michael
 * @example The following is one example of the use of the tokenizer. The code:
 * <code>
 * <?php
 * $str = "this is:@\t\n a test!";
 * $delim = " !@:'\t\n\0"; // remove these chars
 * $st = new StringTokenizer($str, $delim);
 * echo 'Total tokens: '.$st->countTokens().'<br/>';
 * while ($st->hasMoreTokens()) {
 * echo $st->nextToken() . '<br/>';
 * }
 * prints the following output:
 * Total tokens: 4
 * this
 * is
 * a
 * test
 * ?>
 * </code>
 */
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路饭。


本文地址:http://www.45fan.com/bcdm/64681.html
Tags: PHP 统计 英文
编辑:路饭网
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