spamFilter.snippet.php

<?php
/*
        snippet: spamFilter
        purpose: Check message of email for chinese/russian characters and badwords
        usage: add snippet to validate rules and customValidator property
        
        &validate=`message:email:spamFilter:required`
        &customValidators=`spamFilter`
    */
    
    
    $contact = $modx->getOption('emailsender');
    
    $contact = 'info@example.com';
    
    /*
        &validate=`message:emailDetectSpam:required`
    */
    
    if (!function_exists('filterCyrillic')) {
        // Test: Выйграйтe дeньги в казино
        
        function filterCyrillic($value){
            // 1 if found
            // 0 if not found
            // false if an error occurs
            return preg_match( '/[\p{Cyrillic}]/u', $value);
        }
    }
    
    if (!function_exists('filterHan')) {
        // Test: 期期发计划给你
        
        function filterHan($value){
            return preg_match("/\p{Han}+/u", $value);
        }
    }
    
    if (!function_exists('filterURL')) {
        function filterURL($value){
        // test: https://google.com
            
            return preg_match('/http/',$value);
        }
    }
    
    if (!function_exists('filterBlacklist')) {
     // test: crypto, currency, USD, girls    
        
        function filterBlacklist($value){
            $blacklist = array(
                 'bitcoin'    
                ,'sex'
                ,'USD'
            );
            $success = 0;
            foreach($blacklist as $badword){
                if(preg_match('/'.$badword.'/mi',$value) == 1){
                    $success = 1;
                    break;
                }
            }
            return $success;
        }
    }
    
    if(!function_exists('filterEmoji')){
        function filterEmoji ($value){
            // Kein Test. Emojis wwerden in MODX beim speichern gelöscht ;) 
            
            // hat mit einem Textschnipsel von Wikipedia nicht funktioniert...
            // https://de.wikipedia.org/wiki/Emoji
            
            return preg_match("/[\u{1f300}-\u{1f5ff}\u{e000}-\u{f8ff}]/u", $value);
            
            return preg_match('/\xEE[\x80-\xBF][\x80-\xBF]|\xEF[\x81-\x83][\x80-\xBF]/' , $value);
        }
    }
    
    $success = true;
    
    $filters = array(
         'filterCyrillic'   => 1
        ,'filterHan'        => 1
        ,'filterEmoji'      => 1
        ,'filterURL'        => 1
        ,'filterBlacklist'  => 1
    );
    
    if($filters['filterCyrillic'] == 1 AND filterCyrillic($value) == 1){
        $error = 'A1';
        $success = false;
    }
    elseif($filters['filterHan'] == 1 AND filterHan($value) == 1){
        $error = 'A2';
        $success = false;
    }
    elseif($filters['filterEmoji'] == 1 AND filterEmoji($value == 1)){
        $error = 'A3';
        $success = false;
    }
    elseif($filters['filterURL'] == 1 AND filterURL($value) == 1){
        $error = 'A4';
        $success = false;
    }
    elseif($filters['filterBlacklist'] == 1 AND filterBlacklist($value) == 1){
        $error = 'A5';
        $success = false;
    }
    
    if($success == false){
        $msg = 'Das Kontaktformular kann Ihre Nachricht leider nicht versenden (Fehler: '.$error.'). Senden Sie ihre Nachricht bitte per E-Mail an ' . $contact ;

        $validator->addError($key, $msg );
    }
    
    return $success;