PHP Conference Nagoya 2025

    Spoofchecker::areConfusable

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

    Spoofchecker::areConfusable — Checks if given strings can be confused

    Description

    public Spoofchecker::areConfusable(string $string1, string $string2, int &$errorCode = null): bool

    Checks whether two given strings can easily be mistaken.

    Parameters

    string1

    First string to check.

    string2

    Second string to check.

    errorCode

    This variable is set by-reference to int containing an error, if there was any.

    Return Values

    Returns true if two given strings can be confused, false otherwise.

    Examples

    Example #1 Spoofchecker::areConfusable() example

    <?php
    $checker     = new Spoofchecker();

    $checker->areConfusable('google.com', 'goog1e.com'); // true
    // Lower l can be confused with digit one

    $checker->areConfusable('google.com', 'g00g1e.com'); // false
    // Zero (0) cannot be easily confused with "o" letter

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