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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 |
|---|---|
| 227 | */ |
| 228 | function get_image_tag($id, $alt, $title, $align, $size='medium') { |
| 229 | |
| 230 | list( $img_src, $width, $height ) = image_downsize($id, $size); |
| 231 | $hwstring = image_hwstring($width, $height); |
| 232 | |
| 233 | $title = $title ? 'title="' . esc_attr( $title ) . '" ' : ''; |
| 234 | |
| 235 | $class = 'align' . esc_attr($align) .' size-' . esc_attr($size) . ' wp-image-' . $id; |
| 236 | $class = apply_filters('get_image_tag_class', $class, $id, $align, $size); |
| 237 | |
| 238 | $html = '<img src="' . esc_attr($img_src) . '" alt="' . esc_attr($alt) . '" ' . $title . $hwstring . 'class="' . $class . '" />'; |
| 239 | |
| 240 | $html = apply_filters( 'get_image_tag', $html, $id, $alt, $title, $align, $size ); |
| 241 | |
| 242 | return $html; |
| 243 | } |
| 244 | |
| 245 | /** |