input img wordpress SEO

img.php

<?php 
/*
	@author Cristiano de Mari
	@param Int $ID 
	@param String $attachment
	@param Array $args
	@return <img />
*/

function img($ID = NULL, $thumb_size = 'post-thumbnail',$args = NULL ){
	if($ID){
		//get post
		$p = get_post( $ID );
		//not attachment
		if($p->post_type != 'attachment'){
			//get id thumbnail
			$image_post_id   = get_post_thumbnail_id( $ID );
			//get post thumbnail image
			$image_post = get_post( $image_post_id );
			$source_files =  wp_get_attachment_image_src( $image_post->ID  , $thumb_size );
		}
		//is attachment
		if($p->post_type == 'attachment'){
			//thumbnail id
			$image_post_id   = $ID ;
			//get post thumbnail image
			$image_post = $p;
			$source_files =  wp_get_attachment_image_src( $image_post->ID  , $thumb_size );
		}
		//Set attrs 
		if(isset($args['class'])){
			if(is_array($args['class'])){
			  $class = implode(' ', $args['class']);
			}else{
				$class = $args['class'];
			}
		}
		if(isset($args['id'])){
			$id = $args['id'];
		}
		
		$alt       =  get_post_meta($image_post_id, '_wp_attachment_image_alt', TRUE);
		#$legenda   =  ($image_post->post_excerpt) ? $image_post->post_excerpt.' ' : ' ' ;                    
		#$descricao =  ($image_post->post_content) ? $image_post->post_content.' ' : ' ' ;                   
		$title     =  $image_post->post_title;

		$img =  '<img ';
		$img .= ($source_files[0]) ?       "src=\"{$source_files[0]}\" " : '' ;
		$img .= ($id) ?                     "id=\"{$id}\" "              : '' ;
		$img .= ($class) ?               "class=\"{$class}\" "           : '' ;
		$img .= ($title) ?               "title=\"{$title}\" "           : '' ;
		$img .= ($alt) ?                   "alt=\"{$alt}\" "             : '' ;
		$img .= ($source_files[1]) ?   "width=\"{$source_files[1]}\" "   : '' ;
		$img .= ($source_files[2]) ? "height=\"{$source_files[2]}\""     : '' ;
		$img .= ' />';
		
		return $img;
	}
}