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se co nd link co nti nu es to poi nt to the dis k blo ck co nta inin g the dat a, an d the OS will not fre e it as lon g as it do es. Determining File Attributes PHP provides a number of functions which can be used to find additional information about the file: int file_exists(string filename) The file_exists() function can be used to check that the file exists. It returns true if the file exists; otherwise false is returned: int fileatime(string filename) The fileatime() function returns the time when the file was last accessed: int filectime(string filename) The filectime()returns the time when the file, either the content or meta data information like permissions, was last modified: Page 244
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