How to get not get an error if custom image attribute image isn't there?

Question

I'm trying to add an image link to the head of my pages. This code below works except if the image isn't there, I've tried a lot of different ways but no luck. The part <?php echo $this->getImage(); ?> works fine on it's on but it doesn't get the correct image, so I'm using it to fall back on if the other image isn't there. But I keep getting errors and the page goes blank if the image isn't there. Here's my latest attempt.

<?php if (($this->helper('catalog/image')->init(Mage::registry('current_product'), 'twitter_image')) != null): ?>
    <?php $twitter_image = $this->helper('catalog/image')->init(Mage::registry('current_product'), 'twitter_image'); ?> 
    <?php if ($twitter_image): ?><?php echo $twitter_image; ?>
    <?php else: ?>
    <?php echo $this->getImage(); ?>
    <?php endif; ?>
    <?php endif; ?>

Any suggestions?

Thanks

Answer 1

try getimagesize

    <?php if (getimagesize($twitter_image)!== false): ?><?php echo $twitter_image; ?>
    <?php else: ?>
    <?php echo $this->getImage(); ?>
    <?php endif; ?>

another solution

<?php $products=Mage::getModel('catalog/product')->load(Mage::registry('current_product')->getId());
if ($products->getTwitterImage()): ?>
<?php $twitter_image = $this->helper('catalog/image')->init(Mage::registry('current_product'), 'twitter_image'); ?> 
<?php echo $twitter_image; ?>
<?php else: ?>
<?php echo $this->getImage(); ?>

<?php endif; ?>

Answer 2

You need to check your error log / php logs to see what's killed the page.

What looks weird to me immediately is this line:

<?php if (($this->helper('catalog/image')->init(Mage::registry('current_product'), 'twitter_image')) != null): ?>

This is the function you're calling:

/** 135 * Initialize Helper to work with Image 136 * 137 * @param Mage_Catalog_Model_Product $product 138 * @param string $attributeName 139 * @param mixed $imageFile 140 * @return Mage_Catalog_Helper_Image 141 */ 142 public function init(Mage_Catalog_Model_Product $product, $attributeName, $imageFile=null)

It doesn't ever return null, it returns an instance of Mage_Catalog_Helper_Image. If you want to check if the product has the attribute you're better off doing something like

$_product = Mage::registry('current_product); if ($product && $product->getTwitterImage()) { }

Answer 3

 Please try below code.

<?php
$product_id = Mage::registry('current_product')->getId();
$_product = Mage::getModel('catalog/product')->load($_productId);
$twitter_image = $this->helper('catalog/image')->init($_product, 'twitter_image')->resize(100);
    if($twitter_image != '' && $twitter_image != 'no_selection'){
    ?>
    <img src='<php echo$twitter_image ; ?>' />
    <?php
    }
?>