[英]Why do I get 2 equal html GET parameters when using 'hidden' and 'button' input for same variable?
我想在網站中使用三種語言-兩個按鈕用於未選擇的語言，而僅一個文本用於所使用的語言-加上兩個按鈕在div上顯示不同的數據（數據庫中的表，此處未顯示）。
一切都是“ button type ='submit'...”。 我讀到我“只需要”添加一個“ input type ='hidden'...”，但是由於未選擇語言的可點擊按鈕，我在URL上得到一個重復的“ lang”參數。
請問正確的方法是什么？
這是代碼，浮動語言欄位於右上角：
<?php session_start();
// connects to the databse
$erroConn = include(".../connector.php");
// converts $_GETs to $php_vars
if (isset($_GET['lang'])) { // language
$lang = $_GET['lang'];
leDic($lang); // reads the apropriate language file
} else {
$lang = NULL;
}
if (isset($_GET['table'])) { // table
$table = $_GET['table'];
} else {
$table = NULL;
}
?>
<html lang='en'>
<head>
<meta charset='UTF-8'>
<title>Example</title>
<style>
.langs { /* makes the language bar float */
background-color: #90A090;
position:absolute;
right:10;
top:10;
font-size: 0.75em; /* 10px/16px = 0.625em */
}
</style>
</head>
<body>
<form id="form1" name="form1" method="get" action="">
<?php
echo "<h1>".txt('titulo')."</h1>"; // draws the appropriate phrase from the language file
// if don't have a table selected yet
if (is_null($table)) {
// shows both buttons
echo "<button type='submit' name='table' value='A'>table A</button><BR>";
echo "<button type='submit' name='table' value='B'>table B</button><BR>";
} else {
// if already have a table selected, shows only the others as buttons
switch($table) {
case 'A':
echo "table A<BR>";
echo "<button type='submit' name='table' value='B'>table B</button><BR>";
break;
case 'B':
echo "<button type='submit' name='table' value='A'>table A</button><BR>";
echo "table B<BR>";
break;
}
}
// constructs the language bar inside the div 'langs'
$dir1 = glob('./coisas_txt*'); # all languages available
echo "<div id='langs' class='langs'>";
foreach ($dir1 as $fname) {
$sigla = mb_substr($fname,-2,NULL,'UTF-8');
// draws a darker button for the selected language
if ($sigla == $lang) {
echo "<button type='submit' name='lang' value='$sigla'><strong>$sigla</strong></button>";
} else {
echo "<button type='submit' name='lang' value='$sigla'>$sigla</button>";
}
}
echo "</div>";
echo "<div id='tabela'>";
if (!is_null($table)) {
// shows the data, if any
switch($table) {
case 'A':
echo 'tabela A';
break;
case 'B':
echo 'tabela B';
break;
}
}
echo "</div>";
?>
</form>
</body>
</html>
謝謝！
這是基本語言選擇和會話存儲的粗略示例
<?php // lang.php
session_start();
$validLanguages = array('en','jp','ru');
// If found on URL, set the session
if(isset($_GET['lang']) and !empty($_GET['lang']) and in_array($_GET['lang'],$validLanguages))
{
$lang = $_SESSION['lang'] = $_GET['lang'];
}
// Read from session
elseif(isset($_SESSION['lang']))
{
$lang = $_SESSION['lang'];
}
// Default
else
{
$lang = 'en';
}
?>
<form method="get">
<input type="submit" name="lang" value="en" <?php if($lang == 'en'){ ?>disabled<?php }?>>
<input type="submit" name="lang" value="jp" <?php if($lang == 'jp'){ ?>disabled<?php }?>>
<input type="submit" name="lang" value="ru" <?php if($lang == 'ru'){ ?>disabled<?php }?>>
<input type="submit" name="lang" value="es" <?php if($lang == 'es'){ ?>disabled<?php }?>>
</form>
<a href="lang.php">Some Page link</a> | <a href="lang.php">Another Page link</a>
好吧，我需要的是兩個單獨的表單，其中一個表單的按鈕作為另一表單的隱藏輸入，反之亦然。
這是代碼，以防萬一有人需要它：
<?php // index.php
session_start();
$errorConn = include(".../dbfile.php");
// If found on URL, set the session
if(isset($_GET['lang']) and !empty($_GET['lang'])) { //and in_array($_GET['lang'],$validLanguages)
$lang = $_SESSION['lang'] = $_GET['lang'];
} elseif(isset($_SESSION['lang'])) { // Read from session
$lang = $_SESSION['lang'];
} else { // Default
$lang = $_SESSION['lang'] = 'BR';
}
leDic($lang);
if(isset($_GET['table']) and !empty($_GET['table'])) { //and in_array($_GET['lang'],$validLanguages)
$table = $_SESSION['table'] = $_GET['table'];
} elseif(isset($_SESSION['table'])) { // Read from session
$table = $_SESSION['table'];
} else { // Default
$table = $_SESSION['table'] = -1;
}
?>
<html lang='BR'>
<head>
<meta charset='UTF-8'>
<title>Example</title>
<style>
.langs {
background-color: #90A090;
position:absolute;
right:10;
top:10;
font-size: 0.75em; /* 10px/16px = 0.625em */
}
</style>
</head>
<body>
<form id="form1" name="form1" method="get" action="">
<?php
echo "<h1>".txt('titulo')."</h1>";
echo "<input type='hidden' name='lang' value='$lang' />";
echo "<button type='submit' name='table' value='A'>table A</button><BR>";
echo "<button type='submit' name='table' value='B'>table B</button><BR>";
echo "<div id='tabela'>";
if (!is_null($table)) {
switch($table) {
case 'A':
echo 'tabela A';
break;
case 'B':
echo 'tabela B';
break;
}
}
echo "</div>";
?>
</form>
<form id="form2" name="form2" method="get" action="">
<?php
$dir1 = glob('./coisas_txt*'); # all languages available
echo "<input type='hidden' name='table' value='$table' />";
echo "<div id='langs' class='langs'>";
foreach ($dir1 as $fname) {
$sigla = mb_substr($fname,-2,NULL,'UTF-8');
if ($sigla == $lang) {
echo "<button type='submit' name='lang' value='$sigla'><strong>$sigla</strong></button>";
} else {
echo "<button type='submit' name='lang' value='$sigla'>$sigla</button>";
}
}
echo "</div>";
?>
</form>
</body>
</html>
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