【发布时间】：2014-07-07 14:17:51
【问题描述】：
我有一个包含多个提交的表单。首先有一个带有几个选项的下拉菜单。基于该选择，当从菜单中选择一个值时，在页面上的某些语言更改（Buck而不是Bull ...等）。显示更多表单输入。在用户填写其余部分并提交该数据后，将其写入数据库。我遇到的问题是我试图使用 $_SESSION 来存储第一个 $_POST 值。
它会在第一个帖子之后存储它，但在第二个帖子之后它会被清除。非常沮丧。
<?
include_once('global_inc.php');//required for debugging
include_once('MySQL.php');//connects this form to the database
session_start();
?>
<html>
<body>
<form action="<?php print $_SERVER['PHP_SELF']?>" method="post" id="cervidSolutions">
<?
if (empty($_POST)) {
echo "<h3>Please select the species of your farm.</h3>";
echo "<select name='cervid'>";
$list = array("WHITETAIL"=>"Whitetail", "RED_DEER"=>"Red Deer", "ELK"=>"Elk", "FALLOW_DEER"=>"Fallow Deer", "MULE_DEER"=>"Mule Deer");
foreach ($list as $key=>$value) { //Creates a drop down from the above array
echo "<option value='{$key}'";
if ($_POST['cervid'] == $key)
echo " selected";
echo ">{$value}</option>";
}
echo "</select>";
echo "<input type='submit' name='speciesSelected' value='Select Species' />";
}
$_SESSION['cervid'] = $_POST['cervid'];
//Statements to assign noun values
if ($_POST['cervid'] == "WHITETAIL" || $_POST['cervid'] == "MULE_DEER" || $_POST['cervid'] == "FALLOW_DEER") {
$maleNames = "Buck";
$femaleNames = "Doe";
$babyNames = "Fawn";
} else {
$maleNames = "Bull";
$femaleNames = "Hind";
$babyNames = "Calf";
}
/* Main form information including name, email, phone number and head count. */
if (!empty($_POST['cervid'])) { //These elements will only appear if $_POST['cervid'] has a value
echo "<p>Please type your name, email, and phone number. This information will help us provide you with any assistence you may need.</p>
<fieldset class='mainFormNamesFieldset'>
<label for='firstName'>First Name</label>
<input type='text' value='' name='firstName' class='mainFormNames' required />
</fieldset>
<fieldset class='mainFormNamesFieldset'>
<label for='lastName'>Last Name</label>
<input type='text' value='' name='lastName' class='mainFormNames' required />
</fieldset>
<fieldset class='mainFormEmailFieldset'>
<label for='emailAddress'>Email Address</label>
<input type='email' value='' name='emailAddress' class='mainFormEmail' required />
</fieldset>
<fieldset class='mainFormPhoneFieldset'>
<label for='phoneNumber'>Phone Number</label>
<div class='phoneWrap'>
<input type='text' value='' maxlength='3' name='phoneNumber1' id='mainFormPhoneFirst' required /><span class='dash'>-</span>
<input type='text' value='' maxlength='3' name='phoneNumber2' id='mainFormPhoneMiddle' required /><span class='dash'>-</span>
<input type='text' value='' maxlength='4' name='phoneNumber3' id='mainFormPhoneLast' required />
</div>
<div class='phoneWrap'>
<span id='hashLeft'>###</span>
<span id='hashMiddle'>###</span>
<span id='hashRight'>####</span>
</div>
</fieldset>
<fieldset class='mainFormHerdFieldset'>
<label for='maleHeadCount'>Number of ". $maleNames ."</label>
<input type='text' value='' maxlength='3' size='3' name='maleHeadCount' class='mainFormMale' />
</fieldset>
<fieldset class='mainFormHerdFieldset'>
<label for='femaleHeadCount'>Number of ". $femaleNames ."</label>
<input type='text' value='' maxlength='3' size='3' name='femaleHeadCount' class='mainFormFemale' />
</fieldset>
<fieldset class='mainFormHerdFieldset'>
<label for='femaleHeadCount'>Number of ". $babyNames ."</label>
<input type='text' value='' maxlength='3' size='3' name='babyHeadCount' class='mainFormBaby' />
</fieldset>
<input type='submit' name='custInfo' value='Submit Data' id='submitCustInfo' /><input type='reset' name='reset' value='Reset Form' id='resetForm' />";
}
这就是所有相关的代码。剩下的只是一些变量计算和一个插入语句。我知道插入语句是正确的，因为如果我硬编码一个值，它将写入它。做一个 print_r($_SESSION['cervid']);在第一个帖子后显示变量，但在第二个帖子后清除。
【问题讨论】：