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php英文单词统计器,_PHP教程

程序员文章站 2022-05-16 19:18:17
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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

php英文单词统计器,_PHP教程

2. word.php

 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

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 ""; $n=1; while($p->next != null){ $p=$p->next; echo ""; $n++; if ($n%11==0) echo ""; } echo "
".$p->data."
出现次数:".$p->frequency."
".$p->data."
出现次数:".$p->frequency."
"; }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帮客之家。

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