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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 |
|---|---|
| 39 | * @see WP_Embed::shortcode() |
| 40 | * |
| 41 | * @param array $matches The regex matches from the provided regex when calling {@link wp_embed_register_handler()}. |
| 42 | * @param array $attr Embed attributes. |
| 43 | * @param string $url The original URL that was matched by the regex. |
| 44 | * @param array $rawattr The original unmodified attributes. |
| 45 | * @return string The embed HTML. |
| 46 | */ |
| 47 | function wp_embed_handler_polldaddy( $matches, $attr, $url, $rawattr ) { |
| 48 | return apply_filters( 'embed_polldaddy', '<script type="text/javascript" charset="utf8" src="http://s3.polldaddy.com/p/' . esc_attr($matches[1]) . '"></script>', $matches, $attr, $url, $rawattr ); |
| 49 | } |
| 50 | wp_embed_register_handler( 'polldaddy', '#http://answers.polldaddy.com/poll/(\d+)(.*?)#i', 'wp_embed_handler_polldaddy' ); |
| 51 | |
| 52 | ?> |