_autoload_modules.php

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<?php

function temporaryLoader($class)
{
    // handle the upgrade to the latest version of XMLSecLibs using namespaces
    if (strstr($class, 'XMLSec')) {
        if (class_exists('\\RobRichards\\XMLSecLibs\\'.$class, true)) {
            class_alias('\\RobRichards\\XMLSecLibs\\'.$class, $class);
            return;
        }
    }

    if (!strstr($class, 'SimpleSAML_')) {
        return; // not a valid class name for old classes
    }
    $original = $class;

    // list of classes that have been renamed or moved
    $renamed = array(
        'SimpleSAML_Metadata_MetaDataStorageHandlerMDX' => 'SimpleSAML_Metadata_Sources_MDQ',
        'SimpleSAML_Logger_LoggingHandlerSyslog' => 'SimpleSAML_Logger_SyslogLoggingHandler',
        'SimpleSAML_Logger_LoggingHandlerErrorLog' => 'SimpleSAML_Logger_ErrorLogLoggingHandler',
        'SimpleSAML_Logger_LoggingHandlerFile' => 'SimpleSAML_Logger_FileLoggingHandler',
        'SimpleSAML_Logger_LoggingHandler' => 'SimpleSAML_Logger_LoggingHandlerInterface',
        'SimpleSAML_IdP_LogoutHandler' => 'SimpleSAML_IdP_LogoutHandlerInterface',
        'SimpleSAML_IdP_LogoutIFrame' => 'SimpleSAML_IdP_IFrameLogoutHandler',
        'SimpleSAML_IdP_LogoutTraditional' => 'SimpleSAML_IdP_TraditionalLogoutHandler',
    );
    if (array_key_exists($class, $renamed)) {
        // the class has been renamed, try to load it and create an alias
        $class = $renamed[$class];
    }

    // try to load it from the corresponding file
    $path = explode('_', $class);
    $file = dirname(__FILE__).DIRECTORY_SEPARATOR.join(DIRECTORY_SEPARATOR, $path).'.php';
    if (file_exists($file)) {
        require_once $file;
    }

    // it exists, so it's not yet migrated to namespaces
    if (class_exists($class, false) || interface_exists($class, false)) {
        return;
    }

    // it didn't exist, try to see if it was migrated to namespaces
    $new = join('\\', $path);
    if (class_exists($new, false) || interface_exists($new, false)) {
        // do not try to autoload it if it doesn't exist! It should!
        class_alias($new, $original);
        SimpleSAML\Logger::warning("The class or interface '$original' is now using namespaces, please use '$new'.");
    }
}

spl_autoload_register("temporaryLoader");
spl_autoload_register(array('SimpleSAML\Module', 'autoloadPSR0'));
spl_autoload_register(array('SimpleSAML\Module', 'autoloadPSR4'));