我不能为我的生活弄清楚为什么我在运行时从表单输入的信息，不会进入我链接到它的数据库。当我手动输入时，数据库中的信息显示出来，并且删除按钮用于擦除数据库的部分，但添加内容无法使用php表单。请帮忙！
<?php
// A simple PHP script demonstrating how to connect to MySQL.
$servername = getenv('IP');
$username = getenv('C9_USER');
$password = "potato12";
$database = "c9";
$dbport = 3306;
// Create connection
$db = new mysqli($servername, $username, $password, $database, $dbport);
// Check connection
if ($db->connect_error) {
die("Connection failed: " . $db->connect_error);
}
echo "Connected successfully (".$db->host_info.")";
$thisPHP = $_SERVER['PHP_SELF'];
echo <<<EOT
<form action="$thisPHP" method="POST">
Name: <input type="text" name="Name"> Address: <input type="text" name="Address"><br>
Phone: <input type="text" name="Phone"> Email: <input type="text" name="Email"><br>
Availability: <input type="Radio" name="Availability" Value="Now"> Now(<1 month) <input type="Radio" name="Availability" value="Soon"> Soon(1-3 months) <input type="Radio" name="Availability" value="Exploring"> Exploring(3+ months)<br>
Company Title: <input type="text" name="Title"><br>
Job Title: <input type="text" name="Job Title"><br>
Description: <input type="text" name="Description"><br>
Skill 1 <select name="Skill1">
<option>Organized</option><option>Works in a team</option><option>Problem Solving</option>
</select>
Skill 2 <select name="Skill2">
<option>Organized</option><option>Works in a team</option><option>Problem Solving</option></select>
Skill 3 <select name="Skill3">
<option>Organized</option><option>Works in a team</option><option>Problem Solving</option></select><br>
Experiance <select name="Experiance">
<option>0</option><option>1-3</option><option>3-5</option><option>5-10</option><option>10+</option></select><br>
Position: <input type="radio" name="Position" value="Team-Member"> Team-Member <input type="radio" name="Position" value="Team-Leader"> Team-Leader <input type="radio" name="Position" value="Manager"> Manager <input type="radio" name="Position" value="Executive"> Executive <br>
<input type="submit" name="Add" value="Add"> <br>
<hr>
</form>
EOT;
// Start executing the script
$id = $_POST["ID"];
$Name = $_POST["Name"];
$Email = $_POST["Email"];
$Phone = $_POST["Phone"];
$Address = $_POST["Address"];
$Availability = $_POST["Availability"];
$Ctitle = $_POST["Title"];
$Jtitle = $_POST["Job Title"];
$Description = $_POST["Description"];
$Skill1 = $_POST["Skill1"];
$Skill2 = $_POST["Skill2"];
$Skill3 = $_POST["Skill3"];
$Experiance = $_POST["Experiance"];
$Position = $_POST["Position"];
// At least name must be specified
if (!empty($name)){
// Form sql string
$sql = "insert into Employee (ID, Name, Phone, Email, Address, Availability, Title, Job Title, Description, Skill1, Skill2, Skill3, Experiance, Position ) values ('$id', '$Name', '$Phone', '$Email', '$Address' , '$Availability' , '$Ctitle' , '$Jtitle' , '$Description' , '$Skill1' , '$Skill2' , '$Skill3', '$Experiance' , '$Position')";
if ($db->query ($sql) == TRUE)
{
echo "Record added <br>";
}
}
// Check if delete is selected
if (isset($_POST['btnDelete'])) {
$gid = $_POST['gid'];
$sql = "delete from Employee where id='$id'";
if ($db->query ($sql) == TRUE)
{
echo "Record deleted <br>";
}
}
else if (isset($_POST['btnEdit'])) {
$sql = "select * from Employee where id='$id'";
if (($result = $db->query ($sql)) == TRUE)
{
while($row = $result->fetch_assoc()) {
$id = $_POST["ID"];
$Name = $_POST["Name"];
$Email = $_POST["Email"];
$Phone = $_POST["Phone"];
$Address = $_POST["Address"];
$Availability = $_POST["Availability"];
$Ctitle = $_POST["title"];
$Jtitle = $_POST["Job Title"];
$Description = $_POST["Description"];
$Skill1 = $_POST["Skill1"];
$Skill2 = $_POST["Skill2"];
$Skill3 = $_POST["Skill3"];
$Experiance = $_POST["Experiance"];
}
}
echo <<<EOE
<form action="$thisPHP" method="POST">
Name: <input type="text" name="name"> Address: <input type="text" name="Address"><br>
Phone: <input type="text" name="phone"> Email: <input type="text" name="email"><br>
Availability: <input type="Radio" name="Availability" Value="Now"> Now(<1 month) <input type="Radio" name="Availability" value="Soon"> Soon(1-3 months) <input type="Radio" name="Availability" value="Exploring"> Exploring(3+ months)<br>
Company Title: <input type="text" name="title"><br>
Job Title: <input type="text" name="Job Title"><br>
Description: <input type="text" name="description"><br>
Skill 1 <select name="skill1">
<option>Organized</option><option>Works in a team</option><option>Problem Solving</option>
</select>
Skill 2 <select name="skill2">
<option>Organized</option><option>Works in a team</option><option>Problem Solving</option></select>
Skill 3 <select name="skill3">
<option>Organized</option><option>Works in a team</option><option>Problem Solving</option></select><br>
Experiance <select name="experiance">
<option>0</option><option>1-3</option><option>3-5</option><option>5-10</option><option>10+</option></select><br>
Position: <input type="radio" name=Position" value="Team-Member"> Team-Member <input type="radio" name=Position" value="Team-Leader"> Team-Leader <input type="radio" name=Position" value="Manager"> Manager <input type="radio" name=Position" value="Executive"> Executive <br>
<input type="submit" name="Add" value="Add"> <br>
<hr>
</form>
EOE; }
// Show rows
$sql = "SELECT * FROM Employee";
$result = $db->query($sql);
if ($result->num_rows > 0) {
// output data of each row
while($row = $result->fetch_assoc())
{
$id = $row["ID"];
echo
"id: " . $id . " - Name: " . $row["Name"] .
" - Email: " . $row["Email"] .
" - Phone: " . $row["Phone"] .
" - Address: " . $row["Address"] .
" - Availability: " . $row["Availability"] .
" - Company Title: " . $row["Company Title"] .
" - Job Title: " . $row["Job Title"] .
" - Description: " . $row["Description"] .
" - Skill 1: " . $row["Skill1"] .
" - Skill 2: " . $row["Skill2"] .
" - Skill 3: " . $row["Skill3"] .
" - Experiance: " . $row["Experiance"];
echo " <form action=\"$thisPHP\" method='post' style=\"display:inline\" >";
echo "<input type='hidden' name='id' value='$id'>";
echo "<input type='submit' name='btnEdit' value='Edit'> ";
echo "<input type='submit' name='btnDelete' value='Delete'> </form>" . "<br>";
}
} else
{
echo "0 results";
}
$db->close();
＆GT;