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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 |
|---|---|
| 64 | * Discovery is disabled for users lacking the unfiltered_html capability. |
| 65 | * Only providers in this array will be used for those users. |
| 66 | * |
| 67 | * @see wp_oembed_add_provider() |
| 68 | * |
| 69 | * @since 2.9.0 |
| 70 | * |
| 71 | * @param array $providers An array of popular oEmbed providers. |
| 72 | */ |
| 73 | $this->providers = apply_filters( 'oembed_providers', $providers ); |
| 74 | |
| 75 | // Fix any embeds that contain new lines in the middle of the HTML which breaks wpautop(). |
| 76 | add_filter( 'oembed_dataparse', array($this, '_strip_newlines'), 10, 3 ); |
| 77 | } |
| 78 | |
| 79 | /** |
| 80 | * The do-it-all function that takes a URL and attempts to return the HTML. |
| 81 | * |
| 82 | * @see WP_oEmbed::discover() |