Wordpress woocommerce get_post_meta if / else挂起页面

Question

I have a custom field in a woocommerce template. The values from the select box are 0 and 1.

If I put this in my product template file it will echo 1 or 0 depending on the selection made

<?php echo get_post_meta( get_the_ID(), '_select', true ); ?>

However I want to echo out a different button depending on the value with and if/else statement. When I try this the page just hangs and won't load with the following code...

<h1>

<?php 

$grade = get_post_meta( get_the_ID(), '_select', true ); 

if ($grade == true) {
 echo "<a class="button small secondary" title="" href="">True</a>";
} 
else if ($grade == false){
 echo "<a class="button small secondary" title="" href="">False</a>";   
}

?>
</h1>

Any ideas why this is happening?

Answer 1

you should change your double quote to a single like below and all will be fine.

if ($grade == true) {
 echo "<a class='button small secondary' title='' href=''>True</a>";
} 
else if ($grade == false){
 echo "<a class='button small secondary' title='' href=''>False</a>";   
}