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функция не описана

WC_Admin_Post_Types::unique_filename() public WC 1.0

Change filename to append random text.

Это метод класса: WC_Admin_Post_Types{}

Хуков нет.

Возвращает

Строку. Modified filename.

Использование

$WC_Admin_Post_Types = new WC_Admin_Post_Types();
$WC_Admin_Post_Types->unique_filename( $full_filename, $ext );
$full_filename(строка) (обязательный)
Original filename with extension.
$ext(строка) (обязательный)
Extension.

Код WC_Admin_Post_Types::unique_filename() WC 4.5.2

woocommerce/includes/admin/class-wc-admin-post-types.php
<?php
public function unique_filename( $full_filename, $ext ) {
	$ideal_random_char_length = 6;   // Not going with a larger length because then downloaded filename will not be pretty.
	$max_filename_length      = 255; // Max file name length for most file systems.
	$length_to_prepend        = min( $ideal_random_char_length, $max_filename_length - strlen( $full_filename ) - 1 );

	if ( 1 > $length_to_prepend ) {
		return $full_filename;
	}

	$suffix   = strtolower( wp_generate_password( $length_to_prepend, false, false ) );
	$filename = $full_filename;

	if ( strlen( $ext ) > 0 ) {
		$filename = substr( $filename, 0, strlen( $filename ) - strlen( $ext ) );
	}

	$full_filename = str_replace(
		$filename,
		"$filename-$suffix",
		$full_filename
	);

	return $full_filename;
}