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 */
    public const int SINGLE_SCRIPT_CONFUSABLE;
    public const int MIXED_SCRIPT_CONFUSABLE;
    public const int WHOLE_SCRIPT_CONFUSABLE;
    public const int ANY_CASE;
    public const int SINGLE_SCRIPT;
    public const int INVISIBLE;
    public const int CHAR_LIMIT;
    public const int ASCII;
    public const int HIGHLY_RESTRICTIVE;
    public const int MODERATELY_RESTRICTIVE;
    public const int MINIMALLY_RESTRICTIVE;
    public const int UNRESTRICTIVE;
    public const int SINGLE_SCRIPT_RESTRICTIVE;
    public const int MIXED_NUMBERS;
    public const int HIDDEN_OVERLAY;
    /* 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
    public setRestrictionLevel(int $level): void
    }

    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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