Curl-php how to disable remote call address output

I used the curl method in the interface to call a remote address, which contains content output, which affects the output format of my interface, how Can I disable remote address output. in addition, shouldn't the remote link output be the returned value after curl_exec is executed... I used the curl method in the interface to call a remote address, which contains content output, which affects the output format of my interface, how Can I disable remote address output. in addition, shouldn't the remote link output be the returned value after curl_exec is executed? why is it printed directly in the browser?

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I used the curl method in the interface to call a remote address, which contains content output, which affects the output format of my interface, how Can I disable remote address output. in addition, shouldn't the remote link output be the returned value after curl_exec is executed? why is it printed directly in the browser?

$ Url = 'http: // postzz173.com '; $ ch = curl_init (); curl_setopt ($ ch, CURLOPT_URL, $ url); curl_setopt ($ ch, CURLOPT_SSL_VERIFYPEER, false ); curl_setopt ($ ch, CURLOPT_SSL_VERIFYHOST, false); // return instead of directly outputting curl_setopt ($ ch, CURLOPT_RETURNTRANSFER, true ); // The retrieved content is saved in the re variable $ re = curl_exec ($ ch); // The echo ($ re) command is executed to output the data );