<?php//! Write out serialized data.// write_cache uses serialize() to store $var in $filename.// $var - The variable to be written out.// $filename - The name of the file to write to. function write_cache(&$var, $filename) { $filename = $filename; $success = false;// try to open the file if ($fp = @fopen($filename, 'w')) {// obtain a file lock to stop corruptions occuring flock($fp, 2); // LOCK_EX// write serialized data fputs($fp, serialize($var));// release the file lock flock($fp, 3); // LOCK_UN fclose($fp); $success = true; } return $success; }//! Read in seralized data.// read_cache reads the serialized data in $filename and// fills $var using unserialize().// $var - The variable to be filled.// $filename - The name of the file to read. function read_cache(&$var, $filename, $auto_expire = false){ $filename = $filename; $success = false; if (($auto_expire == true) && file_exists($filename)) { $now = time(); $filetime = filemtime($filename); $difference = $now - $filetime; if ($difference >= $auto_expire) { return false; } }// try to open file if ($fp = @fopen($filename, 'r')) {// read in serialized data $szdata = fread($fp, filesize($filename)); fclose($fp);// unserialze the data $var = unserialize($szdata); $success = true; } return $success; }?>
示例:
<?phpread_cache($array,'cache.cache');echo count($array);$array = array();$array[] = '1';$array[] = '2';$array[] = '3';write_cache($array,'cache.cache');?>
相关资源：敏捷开发V1.0.pptx
