July 5, 2011 
Definition:
function wp_http_supports( $capabilities = array() {}
Determines if there is an HTTP Transport that can process this request.
Parameters
- array $capabilities: Array of capabilities to test or a wp_remote_request() $args array.
- string $url: Optional. If given, will check if the URL requires SSL and adds that requirement to the capabilities array.
Source code
function wp_http_supports( $capabilities = array(), $url = null ) {
$objFetchSite = _wp_http_get_object();
$capabilities = wp_parse_args( $capabilities );
$count = count( $capabilities );
// If we have a numeric $capabilities array, spoof a wp_remote_request() associative $args array
if ( $count && count( array_filter( array_keys( $capabilities ), 'is_numeric' ) ) == $count ) {
$capabilities = array_combine( array_values( $capabilities ), array_fill( 0, $count, true ) );
}
if ( $url && !isset( $capabilities['ssl'] ) ) {
$scheme = parse_url( $url, PHP_URL_SCHEME );
if ( 'https' == $scheme || 'ssl' == $scheme ) {
$capabilities['ssl'] = true;
}
}
return (bool) $objFetchSite->_get_first_available_transport( $capabilities );
}
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