嗨，我正在开发一个购物车。我需要知道如何将 php 代码作为电子邮件发送给客户。当客户单击“立即订购”按钮时，必须显示一个页面，显示他购买的所有产品和一封电子邮件应该自动发送到客户的邮件ID，详细说明他购买的产品。我的问题是我不知道编写发送电子邮件的代码。有人可以帮我吗？这是我的代码。
<?php
session_start();
include('head.php');
?>
<?php
$fname=$_POST['fname'];
$lname=$_POST['lname'];
$email=$_POST['email'];
$phone=$_POST['phone'];
$pmode=$_POST['pmode'];
$query="INSERT INTO customer(customer_first_name,customer_last_name,customer_email,customer_phone,payment_type)VALUES('".$fname."','".$lname."','".$email."','$phone','".$pmode."')";
if(mysql_query($query)){
?>
<html>
<center><font color="#493D26"><b><?php echo "Welcome $fname";?></b><font></center><br><br>
<center><font color="#151B54"><b><?php echo "You have successfully registered";?></b></font></center>
<?php
echo "<br>";
echo "<br>";
?>
<form name="orderform" action="pdtorder.php" method="post">
<table align="center" width="750" height="300">
<tr><td> First Name:</td><td><input type="text" name="fname" value="<?php echo $fname; ?>"></td></tr>
<tr><td> Last Name:</td><td><input type="text" name="lname" value="<?php echo $lname; ?>"></td></tr>
<tr><td> Email id :</td><td><input type="text" name="email" value="<?php echo $email; ?>"></td></tr>
<tr><td> Phone Number :</td><td><input type="text" name="phone" value="<?php echo $phone; ?>"></td></tr>
<tr><td> Payment Mode : </td>
<?php
if($pmode=='money'){
?>
<td><font color="#0000A0"><b>Money Transfer</b></font><input type="radio" name="pmode" value="money" checked/></td>
<td><font color="#0000A0"><b>Bank Transfer</b></font><input type="radio" name="pmode" value="bank"/></td>
<td><font color="#0000A0"><b>Credit Card</b></font><input type="radio" name="pmode" value="credit"/></td></tr>
<?php
}
if($pmode=='bank'){
?>
<td><font color="#0000A0"><b>Money Transfer</b></font><input type="radio" name="pmode" value="money" /></td>
<td><font color="#0000A0"><b>Bank Transfer</b></font><input type="radio" name="pmode" value="bank" checked/></td>
<td><font color="#0000A0"><b>Credit Card</b></font><input type="radio" name="pmode" value="credit"/></td></tr>
<?php
}
if($pmode=='credit'){
?>
<td><font color="#0000A0"><b>Money Transfer</b></font><input type="radio" name="pmode" value="money" /></td>
<td><font color="#0000A0"><b>Bank Transfer</b></font><input type="radio" name="pmode" value="bank" /></td>
<td><font color="#0000A0"><b>Credit Card</b></font><input type="radio" name="pmode" value="credit" checked/></td></tr>
<?php
}
?>
</table>
<h4>You have ordered</h4>
<table id="mytable" width="50%" cellpadding="1px" cellspacing="3px">
<tr>
<th>Item</th>
<th>Price</th>
<th>Quantity</th>
<th>Subtotal</th>
</tr>
<?php
$count=0;
foreach( $_SESSION['r'] as $key=>$ar):
?>
<tr id="<?php echo $ar['Id']; ?>">
<td align="center"><?php echo $ar['Name']?></td>
<td align="center"><?php echo $ar['Price']?></td>
<td align="center">
<select class="myclass" name="qty" id='<?php echo $Identifier;?>' >
<?php
for ($i=1; $i<=100; $i++) {
$y="";
if( $i==$_SESSION['r'][$key]['Quantity']){
$y="selected";
}
echo "<option ";
echo "value=\"$i\" ".$y.">", $i, "</option>\n";
}
?>
</select>
</td>
<?php $x=$x+$ar['Quantity']; ?>
<td name="price"><?php echo $ar['Total']; ?></span></td>
<input type='hidden' name='id' id="pid_<?php echo $Identifier;?>" value='<?php echo $ar['Id']; ?>'>
<input type='hidden' name='price' id="price_<?php echo $Identifier;?>" value='<?php echo $ar['Price'] ?>' class="input">
<?php $tt[]=$ar['Total']; ?>
</tr>
<?php
$cnt++;
endforeach;
?>
</table>
<?php
foreach($tt as $t){
$count=$count+$t;
}
?>
<br><br>
<table>
<tr></tr>
<tr><b><font color="B048B5">Grand Total :</font><?php echo $count; ?></b><span id="GrandTotal"></span></tr>
<b><!--<font color="#F6358A">Your Cart:--></font></b>
<div align="center" id="cart"><?php echo $x; ?> </div>
<center><img src="upload/images.jpeg" width="100"></center>
</table>
<input type="submit" name="order" value="Order Now" />
<input type="hidden" name="hemail" value="<?php echo $email; ?>" />
</form>
</html>
<?php
}else{
die(mysql_error());
}
?>
</html>
当我点击“立即订购”按钮时，我需要将 $_SESSION['r'] 作为内容发送到客户的邮件 ID。我该怎么做？由于我需要发送许多产品详细信息，我需要为每个循环使用一个，然后作为电子邮件内容发送。我该怎么做？