php 串联问题

Question

我收到以下行的错误：

$get = mysql_fetch_assoc( $result );    
$id = $_REQUEST['id'];
echo '<form action="invoices.php?id=$id" method="POST">';
echo '<label>Invoice ID: </label>'. $id. '<br>';
echo '<label>User ID: </label>'. $get['customer_id']. '<br>';
echo '<label>Set Status: </label> <select name="status" id="status">
<option value="Unpaid"'.**if($get[/'status/'] == "Unpaid"**){ echo " selected";}.'>Unpaid</option>
<option value="Paid"'.**if($get[/'status/'] == "Paid"**){ echo " selected";}.'>Paid</option>
<option value="Cancelled"' **.if($get[/'status/'] == "Cancelled"**){ echo " selected";}.'>Cancelled</option>
</select>';

它显示的错误是意外的 If 语句在第 xx 行

问题在于 php 连接两个字符串。谁能帮我更正 if 语句？

Answer 1

这个怎么样？

$get = mysql_fetch_assoc( $result );    
$id = $_REQUEST['id'];
echo '<form action="invoices.php?id=' . $id . '" method="POST">';
echo '<label>Invoice ID: </label>'. $id. '<br>';
echo '<label>User ID: </label>'. $get['customer_id']. '<br>';
echo '<label>Set Status: </label> <select name="status" id="status">
<option value="Unpaid"'; if($get['status'] == "Unpaid"){ echo "selected"; } echo '>Unpaid</option>
<option value="Paid"'; if($get['status'] == "Paid"){ echo "selected"; } echo '>Paid</option>
<option value="Cancelled"'; if($get['status'] == "Cancelled"){ echo " selected";} echo '>Cancelled</option>
</select>';

实际上并没有加入字符串，但这会对您有所帮助。

Answer 2

我更喜欢这种格式：

echo '<form action="invoices.php?id=' . $id . '" method="POST">';
echo '<label>Invoice ID: </label>'. $id. '<br>';
echo '<label>User ID: </label>'. $get['customer_id']. '<br>';
echo '<label>Set Status: </label> 
    <select name="status" id="status">
        <option value="Unpaid"' . ($get['status'] == 'Unpaid' ? ' selected' : '') . '>Unpaid</option>
        <option value="Paid"' . ($get['status'] == 'Paid' ? ' selected' : '') . '>Paid</option>
        <option value="Cancelled"' . ($get['status'] == 'Cancelled' ? ' selected' : '') . '>Cancelled</option>
    </select>';

php 串联问题

Issue with php concatenation

php

syntax-error

echo