php让页面记住表单提交后的信息方法

小程序：扫一扫查出行
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<body>
<?php
$name = $_POST['name'];
echo $name;
$gender = $_POST['gender'];
echo $gender;
?>
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
Name: <input type="text" name="name" value="<?php echo $name;?>">
female:<input type="radio" name="gender"
<?php if (isset($gender) && $gender=='female') echo 'checked' ?> value="female">
<input type="submit" name="submit" value="提交">
</form>

ui界面:

后记:

注意要先获取变量才能输出变量，顺序别搞错

p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px 'Helvetica Neue'; color: #454545}
span.s1 {font: 12.0px '.PingFang SC'}

p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px 'Helvetica Neue'; color: #454545}
span.s1 {font: 12.0px '.PingFang SC'}