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see php.net/manual/en/features.file-upload.post-method.php for documentation of the $_FILES array, which is what I came to this page for in the first place. The PHP Manual is available online in a selection of languages. Please pick a language from the list below. More information about php.net URL shortcuts byUnless you specify no sorting, file names are sorted in ASCII alphabetic order, meaning numbers first, then uppercase, then lowercase letters, even on operating Copyright · PHP Manual Time Related Extensions · File System Related Extensions · Human Language and Character Encoding Support · Image Processing Note that realpath() will return false if the file doesn't exist. So if you're going to absolutize the path and resolve symlinks anyway, you can just check the return The PHP manual is available in a selection of languages and formats. going to download the documentation in CHM format, you need to "unblock" the file after Beschreibung ¶. Filesystem is the default wrapper used with PHP and represents the local filesystem. When a relative path is specified (a path which does not throw new RuntimeException('Failed to move uploaded file.'); You will necessarily allow this manually in the case your master files come with AllowOverride You can use file_get_contents() to return the contents of a file as a string. . PS: also see: php.net/manual/de/function.fgetcsv.php to read CSV data into an I just learned that, to specify file names in a portable manner, you DON'T need 'DIRECTORY_SEPARATOR' - just use '/'. This really surprised and shocked me,