TYPO3 Core

/**

* Minify a JavaScript file and store it as temporary file in "typo3temp/"

*

* The filename contains a fix prefix "javascript_" a value user defined prefix

* (normaly the extension key) and last a md5 hash from the filename.

*

* The file will be rewritten if the given files lastmodified tstamp is greater than the cached one.

*

* @param string $file Full path to a file

* @param string $prefix OPTIONAL Can be the filename of file to compress

* @param string $errorMessage OPTIONAL Error message

* @return string Full path to the minifyed tempfile

* @author Michael Klapper <michael.klapper@aoemedia.de>

*/

public static function minifyJS2TempFile($file, $prefix = '', $errorMessage = '') {

$absfile = t3lib_div::getFileAbsFileName($file);

$isValidFile = ( (t3lib_div::validPathStr($file) === true) && file_exists($absfile) && is_file($absfile) && is_readable($absfile) ) ? true : false;

$urlPrefix = $GLOBALS['TSFE']->absRefPrefix;

if ( $isValidFile ) {

$lastModified = fileatime($absfile);

$lastModifiedTempFile = 0;

// create filename / tags:

$tempFileName = 'typo3temp/javascript_' . $prefix . '_' . substr(md5($file), 0, 10) . '.js';

if ( file_exists($tempFileName) && is_file($tempFileName) && is_readable($tempFileName) ) {

$lastModifiedTempFile = fileatime($tempFileName);

}

if ( !file_exists(PATH_site . $tempFileName) || ($lastModified > $lastModifiedTempFile) ) {

$fileContent = t3lib_div::minifyJavaScript (

file_get_contents($absfile),

$errorMessage

);

t3lib_div::writeFileToTypo3tempDir(PATH_site . $tempFileName, $fileContent);

}

}

return $tempFileName;

}

if ($GLOBALS['TSFE']->pSetup['includeJS.'][$key.'.']['minify']) {

$ss = t3lib_div::minifyJS2TempFile($ss, basename($ss, ".js"));

}