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sanitize_filename()

function sanitize_filename(string $filename, bool $transliteration = true, int $max_length = 200): string

Description

Sanitizes a filename for safe storage and usage. This function transliterates international characters, removes or replaces special characters and whitespace, preserves file extensions, prevents null byte attacks, generates fallback names for edge cases, and limits filename length to prevent filesystem issues.

Parameters

Parameter Type Description Default
$filename string The filename to sanitize. N/A
$transliteration bool Whether to transliterate international characters to ASCII. true
$max_length int Maximum length for the base filename, excluding extension. 200

Return Value

Type Description
string The sanitized filename with preserved extension.

Example Usage