定义和用法
clearstatcache()函数的作用是：清除文件状态缓存。
PHP的缓存数据对更快更好的运行函数是非常有利的。如果一个文件在脚本中测试了多次，你也许会禁止对正确的结果进行缓存。为了实现这点，你可以使用clearstatcache()函数。
语法
clearstatcache()
提示和注意
提示：执行缓存的函数：
stat()
lstat()
file_exists()
is_writable()
is_readable()
is_executable()
is_file()
is_dir()
is_link()
filectime()
fileatime()
filemtime()
fileinode()
filegroup()
fileowner()
filesize()
filetype()
fileperms()
案例
|
//check filesize echo filesize("test.txt"); echo " "; $file = fopen("test.txt", "a+"); // truncate file ftruncate($file,100); fclose($file);//Clear cache and check filesize againcle arstatcache(); echo filesize("test.txt"); ?> |
上述代码将输出下面的结果：
792100
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