Using the Verification Code feature in thinkphp3.2

For the security of the site, the use of verification code technology is more common, today according to the thinkphp3.2 full development manual example (address http://document.thinkphp.cn/manual_3_2.html#verify), always error , the verification code cannot be displayed because the GD library was not opened in the php.ini file.

Just remove the Extension=php_gd2.dll comment from the configuration file php.ini (Php_gd2.dll GD library image function Library GD2).

Generate Verification Code

      Public function code () {    $Verifynew  Verify ();     $Verify->fontsize =;     $Verify->length   = 4;     $Verify false ;     $Verify-entry ();}

Login Check

functionDo_login () {//get the user name and password, and so on. And in the database, there is a user allowed to log on otherwise output error page            $username=$_post[' username ']; $password=$_post[' Password ']; $code=$_post[' Code ']; $verify=New\think\verify (); $r=$verify->check ($code, ‘‘); if(!$r){                $this->error (' Verification code Error! ‘); }            $m=m (' User '); $where[' username ']=$username; $where[' Password ']=$password; $i=$m->where ($where),Count(); if($i>0){                $this->redirect (' User/index '); }Else{                $this->error (' The user does not exist '); }        }