Shulou(Shulou.com)06/02 Report--

Database design random design anyway, the user can deposit it!

The body tp background method is simplified:

/ / user Authentication function checknm ($name) {$info = D ('user')-> where ("user_name =' $name'")-> find (); / / dump ($info); die; $flag =''; if ($info) {echo 1;} else {echo 2;}}

Backend returns 1 and 2

The front-end ajax part receives the status of 1 and 2 with data

Of course, the reception of data mainly depends on what format of data type you transmit in the background! This everyone can Baidu ajax!

.msg {color:gray;} .msg2 {color:#ff3333 } function checkname () { Var name = document.getElementById ('User_username'). Value $.get ('/ tpTest/index.php/User/checknm', {name:name}, function (data) {/ / alert (name)) If (data = = 1) {var nm = document.getElementById ('span1'); NM [XSS _ clean] =' username exists'; nm.className = "msg2" } if (data = = 2) {var nm = document.getElementById ('span1'); NM [XSS _ clean] =' user can use' Nm.className = "msg" })} User name

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