intl
PHP Manual

The Spoofchecker class

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

Spoofchecker
/* Constants */
public const int Spoofchecker::SINGLE_SCRIPT_CONFUSABLE;
public const int Spoofchecker::MIXED_SCRIPT_CONFUSABLE;
public const int Spoofchecker::WHOLE_SCRIPT_CONFUSABLE;
public const int Spoofchecker::ANY_CASE;
public const int Spoofchecker::SINGLE_SCRIPT;
public const int Spoofchecker::INVISIBLE;
public const int Spoofchecker::CHAR_LIMIT;
public const int Spoofchecker::ASCII;
public const int Spoofchecker::HIGHLY_RESTRICTIVE;
public const int Spoofchecker::MODERATELY_RESTRICTIVE;
public const int Spoofchecker::MINIMALLY_RESTRICTIVE;
public const int Spoofchecker::UNRESTRICTIVE;
public const int Spoofchecker::SINGLE_SCRIPT_RESTRICTIVE;
public const int Spoofchecker::MIXED_NUMBERS;
public const int Spoofchecker::HIDDEN_OVERLAY;
/* Methods */
public __construct()
public bool areConfusable(string $string1, string $string2, int &$errorCode = null)
public bool isSuspicious(string $string, int &$errorCode = null)
public void setAllowedLocales(string $locales)
public void setChecks(int $checks)
public void setRestrictionLevel(int $level)

Predefined Constants

Spoofchecker::SINGLE_SCRIPT_CONFUSABLE int

Spoofchecker::MIXED_SCRIPT_CONFUSABLE int

Spoofchecker::WHOLE_SCRIPT_CONFUSABLE int

Spoofchecker::ANY_CASE int

Spoofchecker::SINGLE_SCRIPT int

Spoofchecker::INVISIBLE int

Spoofchecker::CHAR_LIMIT int

Spoofchecker::ASCII int

Spoofchecker::HIGHLY_RESTRICTIVE int

Spoofchecker::MODERATELY_RESTRICTIVE int

Spoofchecker::MINIMALLY_RESTRICTIVE int

Spoofchecker::UNRESTRICTIVE int

Spoofchecker::SINGLE_SCRIPT_RESTRICTIVE int

Spoofchecker::MIXED_NUMBERS int

Spoofchecker::HIDDEN_OVERLAY int

Changelog

Version Description
8.4.0 The class constants are now typed.
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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