php中的html元素

我们先看下面的代码 form2.php html head title greetins eartyling / title / head body form action ="formprocess2.php" method ="post" table tr td Name / td td input type ="text" name ="name" // td / tr tr td Greetings / td td select name ="gr

我们先看下面的代码

form2.php

<span><span>html</span><span>></span> 
<span><span>head</span><span>><span>title</span><span>></span>greetins eartyling<span></span><span>title</span><span>></span><span>head</span><span>></span>
<span><span>body</span><span>></span> 
<span><span>form </span><span>action</span><span>="formprocess2.php"</span><span> method</span><span>="post"</span><span>></span>
    <span><span>table</span><span>></span>
        <span><span>tr</span><span>></span>
            <span><span>td</span><span>></span>Name<span></span><span>td</span><span>></span>
            <span><span>td</span><span>><span>input </span><span>type</span><span>="text"</span><span> name</span><span>="name"</span> <span>/></span><span>td</span><span>></span>
        <span></span><span>tr</span><span>></span>
        <span><span>tr</span><span>></span>
            <span><span>td</span><span>></span>Greetings<span></span><span>td</span><span>></span>
            <span><span>td</span><span>></span>
                <span><span>select </span><span>name</span><span>="greeting"</span><span> id</span><span>=""</span><span>></span>
                    <span><span>option </span><span>value</span><span>="Hello"</span><span>></span>Hello<span></span><span>option</span><span>></span>
                    <span><span>option </span><span>value</span><span>="Hola"</span><span>></span>Hola<span></span><span>option</span><span>></span>
                    <span><span>option </span><span>value</span><span>="Bonjour"</span><span>></span>Bonjour<span></span><span>option</span><span>></span>
                <span></span><span>select</span><span>></span>
            <span></span><span>td</span><span>></span>
        <span></span><span>tr</span><span>></span>
        <span><span>tr</span><span>></span>
            <span><span>td</span><span>></span> <span></span><span>td</span><span>></span>
            <span><span>td</span><span>><span>input </span><span>type</span><span>="checkbox"</span><span> name</span><span>="debug"</span><span> checked</span><span>="checked"</span><span>/></span>Display Debug info<span></span><span>td</span><span>></span>
        <span></span><span>tr</span><span>></span>
        <span><span>tr</span><span>></span>
            <span><span>td </span><span>colspan</span><span>="2"</span><span> style</span><span>="text-align:center"</span><span>></span>
                <span><span>input </span><span>type</span><span>="submit"</span><span> name</span><span>="submit"</span><span> value</span><span>="Submit"</span><span>/></span>
            <span></span><span>td</span><span>></span>
        <span></span><span>tr</span><span>></span>
    <span></span><span>table</span><span>></span>
<span></span><span>form</span><span>></span>
<span></span><span>body</span><span>></span>
<span></span><span>html</span><span>></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span>

formprocess2.php

<span><span>html</span><span>></span>
    <span><span>head</span><span>></span>
        <span><span>title</span><span>></span>Greeting earthing<span></span><span>title</span><span>></span>
    <span></span><span>head</span><span>></span>
    <span><span>body</span><span>></span>
    <span></span><span>php
    echo '<h1>'.$_POST["greeting"] ."  ".$_POST["name"].' !</h1>';
    if(isset($_POST["debug"]))
    {
        echo '<pre class="brush:php;toolbar:false"><strong>Degut:</strong>';
        print_r($_POST);
        echo '

'; } ?> body> html>

选中Display Debug info这个checkbox然后点击submit显示内容如下：

Bonjour 谁谁谁 !

<strong>Degut:</strong>Array
(
    [name] => 谁谁谁
    [greeting] => Bonjour
    [debug] => on
    [submit] => Submit
)

可以看到input元素的值都可以使用$_POST("name")函数来获得，不单单是文本框，单选框checkbox和下拉列表框select都可以，注意这里checkbox如果选中获取的值是"on"，不是true，还有如果我们没有选中checkbox使用$_POST("debug")来获取这个checkbox的值会报错，因为$_POST这个数组中没有这个元素。