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
<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CuoXin错新网。
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