什么是单词？
举个例子:
aaa aaa aaa
这就是三个单词。
cyg.php
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <title> 计算字符串单词数量 </title> <meta name="Generator" content="EditPlus"> <meta name="Author" content="author"> <meta name="Keywords" content="dz5362"> <meta name="Description" content="no-description"> <meta http-equiv="Content-type" content="text/html;charset=GB2312"> <link rel='stylesheet' type='text/css' href='style.css' /> </head> <body> <div id="header">计算字符串单词数量</div> <div id="content"> <center>计算字符串单词数量</center> <center> <form method="post" action="cyg.php"> <input type='text' value='Hello PHP!' name='word'><br> <b>注意：输入的字符必须为大小写字母</b><br> <input type="submit" value="提交" name='sel' id="input"> </form> </center> <?php if(!empty($_POST['word'])){//获取数据如果不为空执行if $str = $_POST['word'];//获取输入的所有的字符串 $num = str_word_count($str);//计算单词数量 echo "<script>alert('单词的数量为：".$num."')</script>";//输出单词数量 } ?> </div> </body> </html>
