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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 |
|---|---|
| 90 | } |
| 91 | } |
| 92 | |
| 93 | if ( !$provider && $args['discover'] ) |
| 94 | $provider = $this->discover( $url ); |
| 95 | |
| 96 | if ( !$provider || false === $data = $this->fetch( $provider, $url, $args ) ) |
| 97 | return false; |
| 98 | |
| 99 | return apply_filters( 'oembed_result', $this->data2html( $data, $url ), $url, $args ); |
| 100 | } |
| 101 | |
| 102 | /** |
| 103 | * Attempts to find oEmbed provider discovery <link> tags at the given URL. |
| 104 | * |
| 105 | * @param string $url The URL that should be inspected for discovery <link> tags. |
| 106 | * @return bool|string False on failure, otherwise the oEmbed provider URL. |
| 107 | */ |
| 108 | function discover( $url ) { |