pfitzer/dnsbl

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## DNSBL
check ip for blacklisting

install
-------
composer require pfitzer/dnsbl
```
"require": {
    "pfitzer/dnsbl": "*"
}
```
usage
-----
```
$dnsbl = new Dnsbl();

try {
    $result = $dnsbl->lookup('127.0.0.1');
} catch (\InvalidArgumentException $e) {
    # do something
}
```

contribute
----------
feel free to do so

#### install dev dependencies
```
composer install
```
#### run unit tests
```
docker build -t dnsbl
docker run --rm dnsbl
```