The Spoofchecker class

(PHP 5 >= 5.4.0, PHP 7, PHP 8, PECL intl >= 2.0.0)

Introduction

This class is provided because Unicode contains large number of characters and incorporates the varied writing systems of the world and their incorrect usage can expose programs or systems to possible security attacks using characters similarity.

Provided methods allow to check whether an individual string is likely an attempt at confusing the reader (spoof detection), such as "pаypаl" spelled with Cyrillic 'а' characters.

Class synopsis

class Spoofchecker {
/* Constants */
const int|float ASCII = 0x10000000;
const int|float HIGHLY_RESTRICTIVE = 0x30000000;
const int|float MODERATELY_RESTRICTIVE = 0x40000000;
const int|float MINIMALLY_RESTRICTIVE = 0x50000000;
const int|float UNRESTRICTIVE = 0x60000000;
const int|float SINGLE_SCRIPT_RESTRICTIVE = 0x20000000;
const int SINGLE_SCRIPT_CONFUSABLE = 1;
const int MIXED_SCRIPT_CONFUSABLE = 2;
const int WHOLE_SCRIPT_CONFUSABLE = 4;
const int ANY_CASE = 8;
const int SINGLE_SCRIPT = 16;
const int INVISIBLE = 32;
const int CHAR_LIMIT = 64;
/* Methods */
public __construct()
public areConfusable(string $string1, string $string2, int &$errorCode = null): bool
public isSuspicious(string $string, int &$errorCode = null): bool
public setAllowedLocales(string $locales): void
public setChecks(int $checks): void
}

Predefined Constants

Spoofchecker::ASCII

Spoofchecker::HIGHLY_RESTRICTIVE

Spoofchecker::MODERATELY_RESTRICTIVE

Spoofchecker::MINIMALLY_RESTRICTIVE

Spoofchecker::UNRESTRICTIVE

Spoofchecker::SINGLE_SCRIPT_RESTRICTIVE

Spoofchecker::SINGLE_SCRIPT_CONFUSABLE

Spoofchecker::MIXED_SCRIPT_CONFUSABLE

Spoofchecker::WHOLE_SCRIPT_CONFUSABLE

Spoofchecker::ANY_CASE

Spoofchecker::SINGLE_SCRIPT

Spoofchecker::INVISIBLE

Spoofchecker::CHAR_LIMIT

Changelog

Version Description
7.3.0 Class constants used by Spoofchecker::setRestrictionLevel() such as Spoofchecker::ASCII, Spoofchecker::HIGHLY_RESTRICTIVE, Spoofchecker::MODERATELY_RESTRICTIVE, Spoofchecker::MINIMALLY_RESTRICTIVE, Spoofchecker::UNRESTRICTIVE, Spoofchecker::SINGLE_SCRIPT_RESTRICTIVE has been added.

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