请先在text.txt文件里面写东西.
代码语言：javascript复制<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<style type="text/css">
#center{
width:300px;
border:1px solid #ccc;
height:auto;
margin:0 auto;
text-align:center;
color:#ff6666;
font-weight:normal;
}
#content p{
width:300px;
text-indent:20px;
border:1px solid #ccc;
margin-bottom:3px;
padding:5px 5px 5px 5px;
font-weight:normal;
}
#showTime{
color:#99cc66;
}
#area{
margin-bottom:10px;
}
#input{
margin-top:10px;
}
#text{
width:300px;
height:auto;
line-height:30px;
border:1px solid #ccc;
font-weight:normal;
font-size:14px;
text-indent:20px;
color:#339933;
padding-top:10px;
padding-bottom:10px;
padding-left:10px;
padding-right:10px;
}
</style>
</head>
<body>
<div id="header">统计关键字在文章中出现的次数</div>
<div id="content">
<center>请输入查询关键字：</center>
<center>
<form action="cyg.php" method="post">
<input type='text' value='' name='str' size=15><br>
<input type="submit" value="查 询" id='input'>
</form>
<div id='text'>
<?php echo $text=file_get_contents('text.txt');?>
</div>
</center>
<?php
if(!empty($_POST['str'])){
$str = $_POST['str'];
echo "<script>alert('".$str."关键字出现的次数为：".substr_count($text,$str)."');</script>";
}
?>
</div>
</body>
</html>
