<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<form action="#" method="post">
<input type="text" name="text" value="<?php if (isset($_POST['text'])) echo $_POST['text']; ?>" >
<input type="Submit">
</form>
<?php
//检验是否已提交表单
if($_SERVER['REQUEST_METHOD']=='POST'){
//提交文本框内容
if(!empty($_REQUEST['text'])){
$text=$_REQUEST['text'];
}
else{
$text=null;
}
echo $text;
}
?>
</body>
</html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<form action="#" method="post">
<input type="text" name="text" value="<?php if (isset($_POST['text'])) echo $_POST['text']; ?>" >
<input type="Submit">
</form>
<?php
//检验是否已提交表单
if($_SERVER['REQUEST_METHOD']=='POST'){
//提交文本框内容
if(!empty($_REQUEST['text'])){
$text=$_REQUEST['text'];
}
else{
$text=null;
}
echo $text;
}
?>
</body>
</html>