curl批量伪造数据

<?php
set_time_limit();
$url = "http://www.ciweishixi.dev/app.php?c=form&a=submitActivity";
$num =  ;
for($k =  ; $k <  ; $k++ ){
    $data = array(
    'child_flag' => 'urkldasd' ,
    'field_11' => "单选2--" .getRandom() ,
    'field_12'=>getRandom()   ,
    'field_13'=>"单行文本输入-2-----" . getRandom() ,
    'field_14'=>"多行输入" . getRandom() ,
    'flag' =>"data323" ,
    'source'=>"pc"

    );
    $data =  RequestData($url , $data );
    $data = json_decode($data , true );
    if($data['code'] ==  ){
        $num++;
    }
    usleep();

}
echo "success is : $num ";

     function RequestData($url,$data = null){
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, $url);
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);
        if (!empty($data)){
            curl_setopt($curl, CURLOPT_POST, );
            curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
        }
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, );
        $output = curl_exec($curl);
        curl_close($curl);
        return $output;
    }

    function getRandom($length = , $type = ) {
        switch ($type) {
            case :
                $string = '';
                break;

            case :
                $string = 'abcdefghijklmnopqrstuvwxyz';
                break;

            case :
                $string = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
                break;

            case :
                $string = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
                break;

            case :
                $string = '1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
                break;
        }
        $output = '';
        for ($i = ; $i < $length; $i++) {
            $pos = mt_rand(, strlen($string) - );
            $output .= $string[$pos];
        }
        return $output;
    }