How can I reduce the PF when run php code?

[oneboy]

When I use the function of "file()" to open files many times(refresh in 0s),the webhost's PF becomes higher and higher...I try to unset() the variables, but it is no use.

Is there a way to reduce the code use memory or release it?

[wazaa]

php don't clean memory in a same execution... do you need all the file? do you open the same file some times?

If you don't need all the content of the file, use a fopen and search the pattern in your own ways...

If you open the same file some times, in a session or some sessions (withouth changes of the file), store the file in globals or session variables...

The last possibility is store the file in a BD, to do the same operations with SQL.

[Nugen]

pull information in those files with a for statement that pulls 4096 bytes of information at a time.

Here is an example out of a app I've been writing:

				$fp = fopen($T_FEED[1],"r")
					   or die("Error reading RSS data.");

			// Read the XML file 4KB at a time
			while ($data = fread($fp, 4096))
			   // Parse each 4KB chunk with the XML parser created above
			   xml_parse($xml_parser, $data, feof($fp));

			// Close the XML file
			fclose($fp);

			// Free up memory used by the XML parser
			xml_parser_free($xml_parser);
			// --- end parsing
		} //end feed while