wp_get_attachment_image

Source code

function wp_get_attachment_image($attachment_id, $size = 'thumbnail', $icon = false, $attr = '') {



	$html = '';

	$image = wp_get_attachment_image_src($attachment_id, $size, $icon);

	if ( $image ) {

		list($src, $width, $height) = $image;

		$hwstring = image_hwstring($width, $height);

		if ( is_array($size) )

			$size = join('x', $size);

		$attachment =& get_post($attachment_id);

		$default_attr = array(

			'src'	=> $src,

			'class'	=> "attachment-$size",

			'alt'	=> trim(strip_tags( get_post_meta($attachment_id, '_wp_attachment_image_alt', true) )), // Use Alt field first

			'title'	=> trim(strip_tags( $attachment->post_title )),

		);

		if ( empty($default_attr['alt']) )

			$default_attr['alt'] = trim(strip_tags( $attachment->post_excerpt )); // If not, Use the Caption

		if ( empty($default_attr['alt']) )

			$default_attr['alt'] = trim(strip_tags( $attachment->post_title )); // Finally, use the title



		$attr = wp_parse_args($attr, $default_attr);

		$attr = apply_filters( 'wp_get_attachment_image_attributes', $attr, $attachment );

		$attr = array_map( 'esc_attr', $attr );

		$html = rtrim("<img $hwstring");

		foreach ( $attr as $name => $value ) {

			$html .= " $name=" . '"' . $value . '"';

		}

		$html .= ' />';

	}



	return $html;

}