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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 |
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1061 | // If the caller expects signature verification to occur, check to see if this URL supports it. |
1062 | if ( $signature_verification ) { |
1063 | /** |
1064 | * Filters the list of hosts which should have Signature Verification attempteds on. |
1065 | * |
1066 | * @since 5.2.0 |
1067 | * |
1068 | * @param array List of hostnames. |
1069 | */ |
1070 | $signed_hostnames = apply_filters( 'wp_signature_hosts', array( 'wordpress.org', 'downloads.wordpress.org', 's.w.org' ) ); |
1071 | $signature_verification = in_array( parse_url( $url, PHP_URL_HOST ), $signed_hostnames, true ); |
1072 | } |
1073 |
|
1074 | // Perform signature valiation if supported. |
1075 | if ( $signature_verification ) { |
1076 | $signature = wp_remote_retrieve_header( $response, 'x-content-signature' ); |
1077 | if ( ! $signature ) { |
1078 | // Retrieve signatures from a file if the header wasn't included. |
1079 | // WordPress.org stores signatures at $package_url.sig |