Defination:

This is a sample code to implement different image signatures in your blog post based on a defined variable called "sig" from the custom field.

Instructions

• Step 1: Create a folder in your website root directory called "authors".
• Step 2: Upload the signature image files. (For this example we have 3 difference signatures)
• Step 3: Edit the code below to reflect the name of the image signature files
• Step 4: Insert the code in Main Index Template (index.php) such that it is after your blog post & before your tags or comments code. 

e.g.

<--- Blog Post Content Code here --->  - Usually: <?php the_content(__('Read more', 'studiopress'));?>

<--- Copy code here --->

<---tag code --->

For this example, I am using the 1 or 2 to determined if i plan to use signature 1 or 2 respectively. If I do not define a number it takes the default signature "3" as the main signature.

  <?php
	//This part of the code inserts the value pulled from the custom field ("sig") in the blog post of WordPress to the variable "$signature"
	
	$signature = get_post_meta($post->ID, 'sig', $single = true);
	
	// This then does a check to see if signature 1 is needed
	if ($signature == "1")
	{
		// Input your 1st signature file name
		echo "<img src='/authors/avatar_1.png' />";
	}
	
	// This then does a check to see if signature 2 is needed
	elseif ($signature == "2")
	{
		// Input your 2nd signature file name	
		echo "<img src='/authors/avatar_2.png' />";
	}
	
	// This then loads signature 3 as defauly as signature 1&2 condition was not fulfilled
	else
	{
		// Input your 3rd signature file name
		echo "<img src='/authors/avatar_3.png' />";
	}
?> 

Hope this helps everyone as it works great for me.

Andrew