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我希望能夠禁止我的表單提交時提交用戶名,我想得到一些幫助。禁用按鈕當用戶名被採取時jquery
我的js代碼:
$('#username').keyup(function() {
var username = $(this).val();
$('#username_status').html('Searching...');
if (username !='') {
$.post('username_check.php', { username: username}, function(data) {
$('#username_status').html(data);
});
} else{
$('#username_status').html('');
}
});
,我的檢查用戶名存在與否:
PHP頁面<?php
if(isset($_POST["username"]))
{
define("HOST","localhost");
define("USERNAME","root");
define("PASS","");
define("DBNAME","testingproject");
$connecDB = mysqli_connect(HOST, USERNAME, PASS, DBNAME)or die('could not connect to database');
$username = $_POST["username"];
$results = mysqli_query($connecDB,"SELECT id FROM attendant WHERE username='$username'");
$username_exist = mysqli_num_rows($results); //records count
if($username_exist) {
$output= "Sorry, this Username is taken";
echo ($output);
}else{
echo('available');
}
}
?>
你可以顯示控制make keyup的代碼嗎? –
將你的表單提交到一個Javascript函數中,然後你可以在檢查你的條件後使用submit()。 – Seano666