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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 220 | |
| 221 | list( $img_src, $width, $height ) = image_downsize($id, $size); |
| 222 | $hwstring = image_hwstring($width, $height); |
| 223 | |
| 224 | $class = 'align' . esc_attr($align) .' size-' . esc_attr($size) . ' wp-image-' . $id; |
| 225 | $class = apply_filters('get_image_tag_class', $class, $id, $align, $size); |
| 226 | |
| 227 | $html = '<img src="' . esc_attr($img_src) . '" alt="' . esc_attr($alt) . '" title="' . esc_attr($title).'" '.$hwstring.'class="'.$class.'" />'; |
| 228 | |
| 229 | $html = apply_filters( 'get_image_tag', $html, $id, $alt, $title, $align, $size ); |
| 230 | |
| 231 | return $html; |
| 232 | } |
| 233 | |
| 234 | /** |
| 235 | * Load an image from a string, if PHP supports it. |
| 236 | * |
| 237 | * @since 2.1.0 |
| 238 | * |