(PHP 5 >= 5.4.0, PHP 7, PECL intl >= 2.0.0)
Spoofchecker::isSuspicious — Checks if a given text contains any suspicious characters
public Spoofchecker::isSuspicious ( string $text [, string &$error ] ) : bool
Checks if given string contains any suspicious characters like letters which are almost identical visually, but are Unicode characters from different sets.
text
String to test.
error
This variable is set by-reference to string containing an error, if there were any.
Returns true if there are suspicious characters, false otherwise.
Example #1 Spoofchecker::isSuspicious() example
<?php
$checker = new Spoofchecker();
$checker->isSuspicious('google.com'); // FALSE: only ASCII characters
$checker->isSuspicious('Рaypal.com'); // TRUE
// The first letter is from Cyrylic, not a regular latin "P"
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https://www.php.net/manual/en/spoofchecker.issuspicious.php