php man page for http_match_modified

HTTP_MATCH_MODIFIED(3)							 1						    HTTP_MATCH_MODIFIED(3)

http_match_modified - Match last modification

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

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

PARAMETERS
	      o $timestamp
		- Unix timestamp; current time, if omitted

	      o $for_range
		- if set to TRUE, the header usually used to validate HTTP ranges will be checked

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

SEE ALSO
       http_match_etag(3), http_match_request_header(3), http_cache_etag(3), http_cache_last_modified(3).

PHP Documentation Group 												    HTTP_MATCH_MODIFIED(3)