Failed to call curl () in php Class Method

{Code ...} tip: Warning: curl_setopt (): Warning: AppServwwwqq_api2.phponline45 I call curl () in the method, as if curl () can only be in _ construct...

class Qq_api {    private $list;    function __construct() {        $this->list['dsp_id'] = DSP_ID;        $this->list['token'] = TOKEN;    }    function curl_post($end = '') {$ch = curl_init(URL.$end);curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);    }    function sync() {        $this->curl_post('sync');        $arr = array();curl_setopt($ch, CURLOPT_POSTFIELDS,$arr);$result = curl_exec($ch);var_dump($result);    }   }

Tip:Warning: curl_setopt (): supplied argument is not a valid cURL handle resource in C: \ AppServ \ www \ qq_api2.php on line 45

I call curl () in the method. It seems that curl () can only be initialized in _ construct (). Why?

Reply content:

class Qq_api {    private $list;    function __construct() {        $this->list['dsp_id'] = DSP_ID;        $this->list['token'] = TOKEN;    }    function curl_post($end = '') {$ch = curl_init(URL.$end);curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);    }    function sync() {        $this->curl_post('sync');        $arr = array();curl_setopt($ch, CURLOPT_POSTFIELDS,$arr);$result = curl_exec($ch);var_dump($result);    }   }

Tip:Warning: curl_setopt (): supplied argument is not a valid cURL handle resource in C: \ AppServ \ www \ qq_api2.php on line 45

I call curl () in the method. It seems that curl () can only be initialized in _ construct (). Why?

Sorry, I tried to block it.

The variable $ ch declared by the method in the class is local. Change all $ ch to $ this-> ch.

    function curl_post($end = '') {$this->ch = curl_init(URL.$end);curl_setopt($this->ch, CURLOPT_CUSTOMREQUEST, 'POST');curl_setopt($this->ch, CURLOPT_SSL_VERIFYPEER, false);curl_setopt($this->ch, CURLOPT_SSL_VERIFYHOST, false);curl_setopt($this->ch, CURLOPT_RETURNTRANSFER, true);    }