<form action="<{:url('index/index/login')}>" method="post" name="form1" >
<input type="text" name="username"><br>
<input type="text" name="password"><br>
<input type="text" name="captcha" placeholder="請輸入驗證碼" required=""><br>
<img src="<{:captcha_src()}>" width="95" height="45" onclick="this.src='<{:captcha_src()}>'"><br><br>
<input type="submit"><br>
</form>
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$captcha = $_REQUEST['captcha'];
if(!captcha_check($captcha)){
//驗證失敗
$this->error('驗證碼輸入錯誤');
}else{
$this->success('驗證碼輸入正確');
}
================================================
JS觸發事件,提交后刷新驗證碼
<img src="<{:captcha_src()}>" id="verify_img" width="95" height="45" onclick="this.src='<{:captcha_src()}>'">
var img = document.getElementById('verify_img');
img.src = "<{:captcha_src()}>";
================================================
