PHP检测字符串中的多个连续特殊字符

function checkSpecialChars($str) {
    $pattern = '/([!@#$%^&*()_\-+=~`[\]{}|:;"\'<>,.?\/]+)/';
    preg_match_all($pattern, $str, $matches);
    
    $specialChars = array_unique($matches[0]);
    
    if (count($specialChars) > 1) {
        return true;
    } else {
        return false;
    }
}

// 示例用法
$string1 = "Hello!@#World";
$string2 = "Hello@#World";
$string3 = "HelloWorld";

if (checkSpecialChars($string1)) {
    echo "字符串中包含多个连续特殊字符";
} else {
    echo "字符串中不包含多个连续特殊字符";
}