thinkphp Source Learning---is_ssl () function to determine whether the SSL protocol

/**
* Determine if the SSL protocol
* @return Boolean
*/

function Is_ssl () {if (Isset ($_server[' https ') ') && (' 1 ' = = $_server[' HTTPS ') | |    ' on ' = = Strtolower ($_server[' HTTPS '))) {return true; }elseif (Isset ($_server[' Server_port ") && (' 443 ' = = $_server[' Server_port '])) {//HTTPS Use port 443 retu    RN true; } return false;}

1.$_server[' server_port '] get HTTPS port

2.https Port 443 HTTP port 80

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thinkphp Source Learning---is_ssl () function to determine whether the SSL protocol