时间:2021-07-01 10:21:17 帮助过:9人阅读
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
<?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"] . "
"; 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
<? /** * 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:
".$p->data." 出现次数:".$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 "
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:
*
* <?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().'
';
* 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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