How does curl keep the previous 0

 private function _sendRequest($url)    {        $content = "";        if(function_exists('file_get_contents'))        {            $content = @file_get_contents($url);        }        else        {            $ch = curl_init();            curl_setopt($ch, CURLOPT_URL, $url);            curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);            curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1); //allow redirects            curl_setopt($ch, CURLOPT_HEADER, false);            $content = curl_exec($ch);            $error = curl_errno($ch);            $info = curl_getinfo($ch);            curl_close($ch);        }        $contenArr = json_decode($content);        if(json_last_error() === JSON_ERROR_NONE)        {            return $contenArr;        }        else        {            return $content;        }    

Directly in the browser knocking back is returned 0001 with this method is 1 so reserved in front of the0

Reply content:

 private function _sendRequest($url)    {        $content = "";        if(function_exists('file_get_contents'))        {            $content = @file_get_contents($url);        }        else        {            $ch = curl_init();            curl_setopt($ch, CURLOPT_URL, $url);            curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);            curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1); //allow redirects            curl_setopt($ch, CURLOPT_HEADER, false);            $content = curl_exec($ch);            $error = curl_errno($ch);            $info = curl_getinfo($ch);            curl_close($ch);        }        $contenArr = json_decode($content);        if(json_last_error() === JSON_ERROR_NONE)        {            return $contenArr;        }        else        {            return $content;        }    

Directly in the browser knocking back is returned 0001 with this method is 1 so reserved in front of the0

Json_decode did a good job.
$content was 0001, you Json_decode ($content) to convert it to a value of 1.

Are you sure that Curl was executed, and why not file_get_contents?
Json_decode is used to encode a JSON-formatted string, is it a JSON string, please? Is it surrounded by double quotes?

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