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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 |
|---|---|
| 818 | * Filters the title attribute of the given oEmbed HTML iframe. |
| 819 | * |
| 820 | * @since 5.2.0 |
| 821 | * |
| 822 | * @param string $title The title attribute. |
| 823 | * @param string $result The oEmbed HTML result. |
| 824 | * @param object $data A data object result from an oEmbed provider. |
| 825 | * @param string $url The URL of the content to be embedded. |
| 826 | */ |
| 827 | $title = apply_filters( 'oembed_iframe_title_attribute', $title, $result, $data, $url ); |
| 828 | |
| 829 | if ( '' === $title ) { |
| 830 | return $result; |
| 831 | } |
| 832 | |
| 833 | if ( $has_title_attr ) { |
| 834 | // Remove the old title, $matches[1]: quote, $matches[2]: title attribute value. |
| 835 | $result = str_replace( ' title=' . $matches[1] . $matches[2] . $matches[1], '', $result ); |
| 836 | } |