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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 |
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220 |
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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 |
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229 | $html = apply_filters( 'get_image_tag', $html, $id, $alt, $title, $align, $size ); |
230 |
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231 | return $html; |
232 | } |
233 |
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234 | /** |
235 | * Load an image from a string, if PHP supports it. |
236 | * |
237 | * @since 2.1.0 |
238 | * |