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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 |
---|---|
1175 | * |
1176 | * Passing a non-empty value to the filter will short-circuit generation |
1177 | * of the default playlist output, returning the passed value instead. |
1178 | * |
1179 | * @since 3.9.0 |
1180 | * |
1181 | * @param string $output Playlist output. Default empty. |
1182 | * @param array $attr An array of shortcode attributes. |
1183 | */ |
1184 | $output = apply_filters( 'post_playlist', '', $attr ); |
1185 | if ( $output != '' ) { |
1186 | return $output; |
1187 | } |
1188 |
|
1189 | /* |
1190 | * We're trusting author input, so let's at least make sure it looks |
1191 | * like a valid orderby statement. |
1192 | */ |
1193 | if ( isset( $attr['orderby'] ) ) { |