首页 \ 问答 \ 如何将PHP输入到HTML占位符？(How to input PHP into HTML placeholder?)

如何将PHP输入到HTML占位符？(How to input PHP into HTML placeholder?)

 我正在尝试使用它来保存用户名，然后在下次访问时将其放入HTML占位符。 这样做最有效的方法是什么？  
 我搜索了其他线程并尝试使用'include'并将$ name放在输入占位符中，但它最终给我错误，因为txtName和txtAge未定义。 我不确定如何重新组织我的代码以使其正常工作。  
 PHP和HTML Doc＃1：  
    $doc = "<!DOCTYPE html>
        <html lang='en'>
        SOME HTML........
        <input type='text' name='txtName' id='txtName' placeholder='$name'>
        SOME HTML........
    </html>";

echo $doc;
 
 PHP /文件＃2：  
<?php 

    $name = $_POST["txtName"];
    $age = $_POST["txtAge"];
    $k = $_POST['radRaceLength'];


    ///check if cookie exists
    if ( isset($_COOKIE["nameData"]) ){
        $name = $_COOKIE["nameData"];
    }
    else{
        $name = $name;
    }
    if ( isset($_COOKIE["ageData"]) ){
        $age = $_COOKIE["ageData"];
    }
    else{
        $age = $age;
    }
    setcookie("nameData", $name, time() + 3600, "/");
    setcookie("ageData", $age, time() + 3600, "/");

    $fiveK = 10 + ($age / 2); 
    $tenK = 18 + ($age / 3);
    $member = isset($_POST["chkMember"]) ? $fiveK = $fiveK - 5 AND $tenK = $tenK - 5: $member = NULL;

    if ( !$name AND $age <= 21 )
        echo "Please provide a name and valid age";
    else

        echo $name.', you are registered for the '.$k.' race. Your fee is: ';
        echo ( ($_POST["radRaceLength"] == "5K")? "$fiveK":"$tenK" );



?>

I'm trying to make it so a cookie saves the users name and then puts it in the HTML placeholder next time they visit. What's the most efficient way of doing this? 
I searched the other threads and tried using 'include' and putting $name in the input placeholder, but it ends up giving me errors because txtName and txtAge are undefined. I'm unsure how to reorganize my code to get it working. 
PHP&HTML Doc#1:  
    $doc = "<!DOCTYPE html>
        <html lang='en'>
        SOME HTML........
        <input type='text' name='txtName' id='txtName' placeholder='$name'>
        SOME HTML........
    </html>";

echo $doc;
 
PHP/Doc#2: 
<?php 

    $name = $_POST["txtName"];
    $age = $_POST["txtAge"];
    $k = $_POST['radRaceLength'];


    ///check if cookie exists
    if ( isset($_COOKIE["nameData"]) ){
        $name = $_COOKIE["nameData"];
    }
    else{
        $name = $name;
    }
    if ( isset($_COOKIE["ageData"]) ){
        $age = $_COOKIE["ageData"];
    }
    else{
        $age = $age;
    }
    setcookie("nameData", $name, time() + 3600, "/");
    setcookie("ageData", $age, time() + 3600, "/");

    $fiveK = 10 + ($age / 2); 
    $tenK = 18 + ($age / 3);
    $member = isset($_POST["chkMember"]) ? $fiveK = $fiveK - 5 AND $tenK = $tenK - 5: $member = NULL;

    if ( !$name AND $age <= 21 )
        echo "Please provide a name and valid age";
    else

        echo $name.', you are registered for the '.$k.' race. Your fee is: ';
        echo ( ($_POST["radRaceLength"] == "5K")? "$fiveK":"$tenK" );



?>

原文：https://stackoverflow.com/questions/35215190

更新时间：2022-11-30 12:11

最满意答案

Apache POI是Apache软件基金会的开放源码函式库，POI提供API给Java程序对Microsoft Office格式档案读和写的功能。
HSSF － 提供读写Microsoft Excel格式档案的功能。
XSSF － 提供读写Microsoft Excel OOXML格式档案的功能。
HWPF － 提供读写Microsoft Word格式档案的功能。
HSLF － 提供读写Microsoft PowerPoint格式档案的功能。
HDGF － 提供读写Microsoft Visio格式档案的功能。

其他回答

是一种标志，    <a href="http://wenwen.soso.com/z/urlalertpage.e?sp=shttp%3a%2f%2fwww.digitalstarmap.com%2fproducts%2fpoi.html" target="_blank">http://www.digitalstarmap.com/products/poi.html</a>

如何将PHP输入到HTML占位符？(How to input PHP into HTML placeholder?)

最满意答案

其他回答

相关问答

高德地图api poi是什么意思[2022-05-20]

收集景点poi是什么意思[2023-09-15]

B站说的poi是什么意思[2022-08-10]

poi是什么意思[2023-08-18]

poi是什么意思[2022-02-24]

舰娘里的poi是什么意思？[2022-04-07]

POI是什么意思，有谁能帮我查查[2022-03-29]

poi是什么意思[2023-08-26]

POI是什么意思[2023-11-26]

有个动漫里的poi是什么意思[2022-05-15]

相关文章

最新问答