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| Code | |||||
===== CachedFastTemplate class ===== <?php /* * Class CachedFastTemplate * by Jesus M. Castagnetto (jesusmc@scripps.edu) * (c) 2000. Version 1.0 * * Description: * This class extends CDI's (cdi@thewebmasters.net) FastTemplate class, * implementing methods to cache the output to a file. This would be * useful for cases in which a template is used for both, the static * pages in a web site, and pages created from PHP scripts. In this * way we will avoid processing pages that do not change too often. */ class CachedFastTemplate extends FastTemplate { var $CACHEDIR = "./cache"; // directory to save cached files var $CACHELENGTH = 30; // length of caching, 30 days. function CachedFastTemplate($path_to_tpls="", $cdir="", $clen="") { $this->FastTemplate($path_to_tpls); if (!empty($cdir)) { $this->set_cache_dir($cdir); } if (!empty($clen)) { $this->set_cache_length($clen); } } function set_cache_dir($dir) { if (substr($dir,(strlen($dir) - 1), 1) == "/") { $dir = substr($dir,0,-1); } $this->CACHEDIR = $dir; } function set_cache_length($length) { $this->CACHELENGTH = $length; } function write_to_cache($filename="", $content="") { global $PHP_SELF; if (empty($filename)) { $filename = str_replace("/", "_", $PHP_SELF); } if (empty($content)) { $content = $this->fetch(); } // write the contents $fp = fopen($this->CACHEDIR."/".$filename.".cache", "w"); fwrite($fp,$content); fclose($fp); // write the cache control file $datestamp = $this->_mkdatestamp(); $fp = fopen($this->CACHEDIR."/".$filename.".cntrl", "w"); fwrite($fp, $datestamp.":".$this->CACHELENGTH); fclose($fp); } function read_from_cache($filename="") { global $PHP_SELF; if (empty($filename)) { $filename = str_replace("/", "_", $PHP_SELF); } if ($this->is_cached($filename)) { readfile($this->CACHEDIR."/".$filename.".cache"); return true; } else { return false; } } function is_cached($filename) { return (is_file($this->CACHEDIR."/".$filename.".cache") && is_file($this->CACHEDIR."/".$filename.".cntrl")); } function valid_cache_file($filename="") { global $PHP_SELF; if (empty($filename)) { $filename = str_replace("/", "_", $PHP_SELF); } if ($this->is_cached($filename)) { $info = file($this->CACHEDIR."/".$filename.".cntrl"); $val = explode(":", $info[0]); $today = $this->_mkdatestamp(); return ( $this->_diff_days($today, $val[0]) <= $val[1] ); } else { return false; } } function _mkdatestamp() { $now = getdate(time()); return mktime(0, 0, 0, $now["mon"], $now["mday"], $now["year"]); } function _diff_days($end, $start) { return intval(($end - $start)/(60*60*24)); } } // end of class definition ?> ===== test_class.php ===== <?php // This test file is a simple modification of a // sample file include in FastTemplate require ("./class.FastTemplate.php3"); require ("./class.CachedFastTemplate.php3"); $tpl = new CachedFastTemplate("./templates"); // for benchmarking // $start = $tpl->utime(); $filename = "yipeee.html"; // if the filename is empty, the class will use PHP_SELF // Check if we can send the cached file if ($tpl->valid_cache_file($filename)) { echo "<B>FROM CACHE</B>\n<BR>"; $tpl->read_from_cache($filename); $end = $tpl->utime(); $runtime = ($end - $start)*1000; echo "Completed in $runtime miliseconds<BR>\n"; exit; // Otherwise process the page // the templates are distributed w/FastTemplate $tpl->define( array( main => "main.tpl", table => "table.tpl", row => "row.tpl" ) ); $tpl->assign( array( TITLE => "FastTemplate Test") ); for ($n=1; $n <= 3; $n++) { $Number = $n; $BigNum = $n*10; $tpl->assign( array( NUMBER => $Number, BIG_NUMBER => $BigNum ) ); $tpl->parse(ROWS,".row"); } $tpl->parse(MAIN, array("table","main")); $data = $tpl->fetch(); $tpl->write_to_cache($filename, $data); $tpl->FastPrint(); // for benchmarking // $end = $tpl->utime(); // $runtime = ($end - $start)*1000; // echo "Completed in $runtime miliseconds<BR>\n"; exit; ?> | |||||
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