Only show image from custom field when present

Question

How would I adjust the following code to only show the image tag when there is a variable present in the "imageembed" field?

<?php $imageid = get_post_meta($post->ID, 'imageembed', true); ?>
   <div class="newsimage"><img src="<?php echo wp_get_attachment_url( $imageid ); ?>" width="640" /></div>

Answer 1

<?php
    $imageid = get_post_meta($post->ID, 'imageembed', true);
    if($imageid != '') 
       { ?>
        <div class="newsimage"><img src="<?php echo wp_get_attachment_url( $imageid ); ?>" width="640" /></div>
<?php  } ?>

Use if condition to check if $imageid has any value in it or not.

Answer 2

    <?php    
  if (strlen($imageid = get_post_meta($post->ID, 'imageembed', true))) {
?>
    <div class="newsimage"><img src="<?php echo wp_get_attachment_url((int) $imageid); ?>" width="640" /></div>
<?php } ?>

Answer 3

Simple. Use the if conditional statement, like this:

<?php
    if ( get_post_meta($post->ID, 'imageembed', true) ) {
        $imageid = get_post_meta($post->ID, 'imageembed', true);
?>

    // Show when custom field has a value
    <div class="newsimage"><img src="<?php echo wp_get_attachment_url( $imageid ); ?>" width="640" /></div>

<?php } ?>

READ: Function Reference / get_post_meta (WordPress Codex)