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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 |
|---|---|
| 1159 | |
| 1160 | /** |
| 1161 | * Filters the URL where the signature for a file is located. |
| 1162 | * |
| 1163 | * @since 5.2.0 |
| 1164 | * |
| 1165 | * @param false|string $signature_url The URL where signatures can be found for a file, or false if none are known. |
| 1166 | * @param string $url The URL being verified. |
| 1167 | */ |
| 1168 | $signature_url = apply_filters( 'wp_signature_url', $signature_url, $url ); |
| 1169 | |
| 1170 | if ( $signature_url ) { |
| 1171 | $signature_request = wp_safe_remote_get( |
| 1172 | $signature_url, |
| 1173 | array( |
| 1174 | 'limit_response_size' => 10 * KB_IN_BYTES, // 10KB should be large enough for quite a few signatures. |
| 1175 | ) |
| 1176 | ); |
| 1177 | |