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这是错误，我该如何解决它？那是所有的代码，我很困惑与PHP。我有自动模板制作错误日志，所以我看到了这一点，我无法访问profile.php。请帮忙！PHP致命错误：调用未定义的函数getusername（）
<?php
\t require_once('./pieces/header.php');
?>
<div class="row">
\t <div class="col-sm-8" id="center">
\t \t <div class="panel panel-default">
\t \t \t <div class="panel-heading">Profile Editor</div>
\t \t \t <div class="panel-body">
\t \t \t \t <form method="POST">
\t \t \t \t <div class="form-group input-group">
\t \t \t \t \t \t <span class="input-group-addon"><i class="fa fa-github-alt"></i></span>
\t \t \t \t \t \t <input type="text" class="form-control" value="<?php $user>getUsername(); ?>" title="Account username." disabled />
\t \t \t \t \t </div>
\t \t \t \t \t <div class="form-group input-group">
\t \t \t \t \t \t <span class="input-group-addon"><i class="fa fa-envelope"></i></span>
\t \t \t \t \t \t <input type="text" class="form-control" value="<?php $user>getEmail(); ?>" title="Account email." disabled />
\t \t \t \t \t </div>
\t \t \t \t \t <div class="form-group input-group">
\t \t \t \t \t \t <span class="input-group-addon"><i class="fa fa-trophy"></i></span>
\t \t \t \t \t \t <input type="text" class="form-control" value="<?php $user>getMembership(); ?>" title="Account membership." disabled />
\t \t \t \t \t </div>
\t \t \t \t \t <div class="form-group input-group">
\t \t \t \t \t \t <span class="input-group-addon"><i class="fa fa-key"></i></span>
\t \t \t \t \t \t <input type="password" name="oldpassword" class="form-control" placeholder="Current Password" title="Current account password." value="" maxlength="32" autocomplete="off" />
\t \t \t \t \t </div>
\t \t \t \t \t <div class="form-group input-group">
\t \t \t \t \t \t <span class="input-group-addon"><i class="fa fa-key"></i></span>
\t \t \t \t \t \t <input type="password" name="password" class="form-control" placeholder="New Password" value="" title="New account password." maxlength="32" autocomplete="off" />
\t \t \t \t \t </div>
\t \t \t \t \t <div class="form-group no-margn">
\t \t \t \t \t \t <input type="submit" name="save" class="btn btn-success btn-block" value="Save Changes"/>
\t \t \t \t \t </div>
\t \t \t \t </form>
\t \t \t </div>
\t \t </div>
\t </div>
该功能是否定义？ – zerkms
@zerkms它应该连接到MySQL，当他们更改用户名密码或电子邮件时，它们会在点击提交并发送给MySQL时发生变化。 –