How Can I Reliably Create Directories with UTF-8 Filenames in PHP?

Using UTF-8 Strings in PHP Filesystem Functions

In PHP, UTF-8 strings can prove problematic when using filesystem functions. Consider the code snippet below:

$dir_name = "Depósito";
mkdir($dir_name);

When browsed in Windows Explorer, the created folder appears as "Depósito". This issue arises due to incompatibilities between UTF-8 strings and the filesystem's native encoding (ISO-8859-1 on Windows).

To resolve this, you can:

Use URL Encoding

URL encoding converts characters to a form that is safe for use in filenames. To create a directory with UTF-8 characters, you can encode the string as follows:

$dir_name = urlencode("Depósito");
mkdir($dir_name);

Limitations of Alternative Solutions

While some alternative solutions exist, they come with their own drawbacks:

• Using ASCII-Only Filenames: This limits filenames to characters supported by ISO-8859-1, which can be restrictive.
• Converting UTF-8 to ISO-8859-1: This can lead to incorrect characters being displayed in non-Windows environments or when using filesystem functions that don't natively handle UTF-8.
• Transliteration: Transliteration involves replacing characters with similar-sounding alternatives, which may not always be desirable or preserve the original meaning.

In conclusion, URL encoding remains the preferred solution for handling UTF-8 strings in PHP filesystem functions. It ensures compatibility across different environments and allows for accurate representation of characters in filenames.

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