5.PHP与Web页面交互

PHP与Web页面交互

PHP中提供了两种与Web页面交互的方法，一种是通过Web表单提交数据，另一种是通过URL参数传递。

表单提交用户名字和密码：

<form name "form1" method="post" action="">
    UserName:<input type="text" name="user" size="20"></td>
    PassWord:<input name="pwd" type="password" id="pwd" size="20"></td>
    <input name="submit" type="submit" id="submit" value="login">&nbps;</td>
    </tr>
</form>      

<?php
if($_POST["submit"] == "login"){
    echo "User:".$_POST['user']." Password:".$_POST['pwd'];
}
?>      

单选按钮选择性别

<form action="" method="post" name="form1">
sex:<input name="sex" type="radio" value="1" checked>Man<input name="sex" type ="radio" value="0">Woman
    <input type="submit" name="Submit" value="submit">
</form>
<?php
    echo "esx:".$_POST["sex"];
?>      

复选框选择爱好

<form name="form1" method="post" action="">
    <table width="445" cellpadding="0" cellspacing="0">
        <tr>
            <td width="443" height="41" align="center" valign="top">ni xi huan de tu shu lei xing:
                <input type="checkbox" name="mrbool[]" value="rumen"> rumen
                <input type="checkbox" name="mrbool[]" value="anli"> anli
                <input type="checkbox" name="mrbool[]" value="jiangjie"> jiangjie
                <input type="checkbox" name="mrbool[]" value="shili"> shili
                <input type="submit" name="submit" value="submit">
            </td>
        </tr>
     </table>
</form>      

<?php
if($_POST["mrbool"] != null){
    echo "ni xuan ze de jie guo shi:";
    for($i = 0 ;$i < count($_POST["mrbool"]) ;$i ++) {
        echo $_POST["mrbool"][$i] . "  ";
    }
}
?>      

下拉列表选择

<form name="form1" method="post" action="">
    <table width="280" border="0" cellpadding="0" cellspacing="0">
        <tr>
            <td width="80" height="20" align="center"> <span class="stype2">yijianzhuti:</span> </td>
            <td width="194">
                <select name="select" size="1">
                    <option value="gongsifazhan" selected>gongsifazhan</option>
                    <option value="guanlizhidu">guanlizhidu</option>
                    <option value="houqinfuwu">houqinfuwu</option>
                 </select>   
                 <input type="submit" name="submit" value="submit">
            </td>
        </tr>
    </table>
</form>      

<?php
    if($_POST["select"] != ""){
        echo "ninxuanzedeyijianzhutiwei:<br>";
        echo $_POST["select"]."\n";
    }
?>      

菜单栏选择（可多选）

<form name="form1" method="post" action="">
    <table width="300" border="0" cellpadding="0" cellspacing="0">
        <tr>
            <td height="30" align="center" valign="middle">qing xuan ze xi huan de PHP lei tu shu</td>
        </tr>
        <tr>
            <td align="center" valign="middle"><select name="select[]" size="5" multiple>
                <option value="11111">11111</option>
                <option value="22222">22222</option>
                <option value="33333">33333</option>
                <option value="44444">44444</option>
                <option value="55555">55555</option>
            </select></td>
        </tr>
        <tr>
            <td height="30" align="center" valign="middle">
                <input type="submit" name="Submit" value="submit">
            </td>
        </tr>
    </table>
</form>

<?php
    if($_POST["Submit"] == "submit"){
        echo "ninxuanzedeyijianzhutiwei:<br>";
        for($i = 0;$i < count($_POST["select"]) ;$i ++){
            echo $_POST["select"][$i]."\n";
        }
    }
?>      

获取文件域的值

<!-accept可以指定文件类型-!>
<!-本例子并没有真是上传文件，所以没有写元素enctype="multipart/form-data"-!>
<form name="f" method="post" action="">
    <input type="file" name="file" size="15">
    <input type="submit" name="upload" value="up">
</form>      

<?php
    echo $_POST["file"];
?>      

URL参数编码/解码

<a href="demo.php?id=<?php echo urlencode("aaa a编码")?>">PHPLINK</a>
//http://localhost:63342/untitled/demo.php?id=aaa+a%E7%BC%96%E7%A0%81      

<?php
    header("Content-Type: text/html;charset=utf-8");
//echo urlencode("aaaa你好");
    echo urldecode(urlencode("aaaa你好"));
?>      

最后无聊，写了一个评论的东西。简单的模拟而已，用文件存的。并且没有各种ip次数什么的限制。就是为了练习下相关表单提交。

Index.php是主界面

WriteATalk.php是提交处理界面，直接就是表单提交到这里，存下文件而已。

Index.php
<form name "form1" method="post" action="WriteATalk.php">
    Say Something:<br>
    <textarea name="tktk"  id="tktk" rows="10" cols="40" ></textarea>
    <input name="submit" type="submit" id="submit" value="Submit">
</form>

<?php
header("Content-Type: text/html;charset=utf-8");
function ShowTalk()
{
    $fp = fopen("talk.dat", "a+");
    if ($fp) {
        while (!feof($fp)) {
            echo fgets($fp)."<br>";
        }
        fclose($fp);
    }
    return ;
}
ShowTalk();
?>
WriteATalk.php
<?php
    header("Content-Type: text/html;charset=utf-8");
    function AddOneTalk($str_message){
        $fp = fopen("talk.dat", "a+");
         if(!($fp)){
         return 0;
        }
        $flag=fwrite($fp,$str_message."\r\n");
        fclose($fp);
        return $flag;
    }
    $str_message =  date("Y/m/d h:i:s a")." ( ".$_SERVER["REMOTE_ADDR"]." )"."<br>";
    $str_message =$str_message."  ".$_POST["tktk"]."<br>";
    AddOneTalk($str_message);
    echo"以下内容已经成功提交:<br>".$str_message."<br>";
    echo "<a href='index.php'>返回上一页面</a>";
?>