How Can I Successfully Create Folders with UTF-8 Characters in PHP's Filesystem Functions?

Working with UTF-8 Strings in PHP Filesystem Functions

Encountering issues while creating folders with UTF-8 characters using PHP's mkdir function? You're not alone. This problem stems from the expectation of PHP's filesystem wrapper to use ISO-8859-1 strings on Windows. To address this, consider the following solutions:

Preferred Solution: URL Encoding

• Encode UTF-8 strings: Convert your UTF-8 directory names into URL-encoded strings using the urlencode function.
• URL-encoded strings: URL-encoded characters are valid in filenames across NTFS, HFS, and UNIX systems.
• Decode when needed: You can decode the filename back to UTF-8 using urldecode when reading or displaying.

Alternative Solutions (with Caveats):

Option 1: Embrace ISO-8859-1

• Limit characters: Restrict filenames to characters representable in ISO-8859-1.
• Encode before using: Perform UTF-8 to ISO-8859-1 conversion using utf8_decode before using the filename in filesystem functions.
• Decode after scanning: Encode entries obtained from scandir using utf8_encode to access original UTF-8 filenames.

Option 2: Invalid Characters

• Check for invalid characters: Determine if any bytes in the filename match invalid characters in ISO-8859-1.
• Potential issues: This method may not work in all scenarios, especially if the system uses a different encoding than ISO-8859-1.
• Consider transliteration: Transliterating UTF-8 characters might be a more reliable option.

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