通过锚链接传递变量显示未识别的索引错误

Question

HTML page to PHP page: (works like a charm)

<a href="usercouponadd.php?id=<?php echo $row2['id'];?>" class="addbutton" ><strong>Add</strong></a>

PHP #1 to another PHP #2 page : (shows a error)

echo '<a href="usercouponaddtopay.php?couponvalue=<?php echo $row[\'couponvalue\'];?>"></a>';

PHP #2 variable initialization: (Un identifies couponvalue index)

$usercouponinhand = $_GET["couponvalue"];

Which put me in a confusing state of whether what did i missed... I have kinda brainstormed 4 hours in it. Any suggestions are welcome..

Answer 1

You can't use <?php inside a string literal. If you view the source of the web page, you'll see that it's actually putting <?php echo $row['couponvalue'];?> in the URL, not the value of the variable. <?php can only be used when you're outside the PHP scripting mode.

So it should be:

echo '<a href="usercouponaddtopay.php?couponvalue={$row['couponvalue']""></a>';

or

?>
<a href="usercouponaddtopay.php?couponvalue=<?php echo $row['couponvalue'];?>"></a>
<?php