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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 |
|---|---|
| 1183 | |
| 1184 | /** |
| 1185 | * Filters the URL where the signature for a file is located. |
| 1186 | * |
| 1187 | * @since 5.2.0 |
| 1188 | * |
| 1189 | * @param false|string $signature_url The URL where signatures can be found for a file, or false if none are known. |
| 1190 | * @param string $url The URL being verified. |
| 1191 | */ |
| 1192 | $signature_url = apply_filters( 'wp_signature_url', $signature_url, $url ); |
| 1193 | |
| 1194 | if ( $signature_url ) { |
| 1195 | $signature_request = wp_safe_remote_get( |
| 1196 | $signature_url, |
| 1197 | array( |
| 1198 | 'limit_response_size' => 10 * KB_IN_BYTES, // 10KB should be large enough for quite a few signatures. |
| 1199 | ) |
| 1200 | ); |
| 1201 | |