February 12, 2011 
Definition:
function get_image_tag($id, $alt, $title, $align, $size='medium') {}
An <img src /> tag for an image attachment, scaling it down if requested.
The filter ‘get_image_tag_class’ allows for changing the class name for the image without having to use regular expressions on the HTML content. The parameters are: what WordPress will use for the class, the Attachment ID, image align value, and the size the image should be.
Parameters
- int $id: Attachment ID.
- string $alt: Image Description for the alt attribute.
- string $title: Image Description for the title attribute.
- string $align: Part of the class name for aligning the image.
- string $size: Optional. Default is ‘medium’.
Return values
returns:HTML IMG element for given image attachment
Defined filters
- get_image_tag_class
apply_filters('get_image_tag_class', $class, $id, $align, $size) - get_image_tag
apply_filters( 'get_image_tag', $html, $id, $alt, $title, $align, $size )
Source code
function get_image_tag($id, $alt, $title, $align, $size='medium') {
list( $img_src, $width, $height ) = image_downsize($id, $size);
$hwstring = image_hwstring($width, $height);
$class = 'align' . esc_attr($align) .' size-' . esc_attr($size) . ' wp-image-' . $id;
$class = apply_filters('get_image_tag_class', $class, $id, $align, $size);
$html = '<img src="' . esc_attr($img_src) . '" alt="' . esc_attr($alt) . '" title="' . esc_attr($title).'" '.$hwstring.'class="'.$class.'" />';
$html = apply_filters( 'get_image_tag', $html, $id, $alt, $title, $align, $size );
return $html;
}
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