Function clearCache
Used to delete files in the cache directories, or clear contents of cache directories
 Package: Cake
Copyright: Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
License: MIT License
Located at Cake/basics.php
 
 Copyright: Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
License: MIT License
Located at Cake/basics.php
clearCache( string|array $params null string $type 'views' string $ext '.php' )
Parameters summary
string|array |  $params = null |  As String name to be searched for deletion, if name is a directory all files in directory will be deleted. If array, names to be searched for deletion. If clearCache() without params, all files in app/tmp/cache/views will be deleted | 
string |  $type = 'views' |  Directory in tmp/cache defaults to view directory | 
string |  $ext = '.php' |  The file extension you are deleting | 
Returns
-  
trueif files found and deleted false otherwise 
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    http://api.cakephp.org/2.7/function-clearCache.html