February 12, 2011 
Definition:
function wp_get_http_headers( $url, $deprecated = false ) {}
Retrieve HTTP Headers from URL.
Parameters
- string $url
- bool $deprecated: Not Used.
Return values
returns:False on failure, headers on success.
Source code
function wp_get_http_headers( $url, $deprecated = false ) {
if ( !empty( $deprecated ) )
_deprecated_argument( __FUNCTION__, '2.7' );
$response = wp_remote_head( $url );
if ( is_wp_error( $response ) )
return false;
return wp_remote_retrieve_headers( $response );
}
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A HitchHackers guide through WordPress 
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