http_match_modified

(PECL pecl_http >= 0.1.0)

http_match_modified — Match last modification

bool http_match_modified ([ int $timestamp = -1 [, bool $for_range = false ]] )

Matches the given Unix timestamp against the clients If-Modified-Since resp. If-Unmodified-Since HTTP headers.

timestamp: Unix timestamp; current time, if omitted
for_range: if set to TRUE, the header usually used to validate HTTP ranges will be checked

Returns TRUE if timestamp represents an earlier date than the header, else FALSE.