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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 |
|---|---|
| 142 | /** |
| 143 | * Filter the link types that contain oEmbed provider URLs. |
| 144 | * |
| 145 | * @since 2.9.0 |
| 146 | * |
| 147 | * @param array $format Array of oEmbed link types. Accepts 'application/json+oembed', |
| 148 | * 'text/xml+oembed', and 'application/xml+oembed' (incorrect, |
| 149 | * used by at least Vimeo). |
| 150 | */ |
| 151 | $linktypes = apply_filters( 'oembed_linktypes', array( |
| 152 | 'application/json+oembed' => 'json', |
| 153 | 'text/xml+oembed' => 'xml', |
| 154 | 'application/xml+oembed' => 'xml', |
| 155 | ) ); |
| 156 | |
| 157 | // Strip <body> |
| 158 | $html = substr( $html, 0, stripos( $html, '</head>' ) ); |
| 159 | |
| 160 | // Do a quick check |