返回语句的语法错误

本文介绍了返回语句的语法错误的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我正在做一个简单的网站，却遇到了这个错误:

I'm doing this simple website, and I have run into this error:

我的功能:

<?php function user_exists($username) { $username = sanitize($username); $query = mysqli_query($connect, "SELECT COUNT(`user_id`) FROM `users` WHERE `username` = '$username'"); return (mysqli_result($query, === 0) 1) ? true : false; } ?>

我的php错误日志:

PHP Parse error: syntax error, unexpected '===' (T_IS_IDENTICAL) in function on line 6

第6行是返回行.

我了解语法错误的含义，但是我很确定'==='并不是问题.

I understand what a syntax error means, but I'm quite sure that the '===' is not the problem.

推荐答案

我只是在谈论三元条件，这个答案是错误的，因为 mysqli_result()函数不存在.

Edit : I was only talking about the ternary condition and this answer is false because the mysqli_result() function doesn't exist.

我想您正在尝试这样做:

I guess you are trying to do this :

return mysqli_result($query) === 0 ? false : true;

正如Marcel Korpel所说，请使用准备好的语句来避免安全漏洞.

And as Marcel Korpel said, use prepared statements to avoid security flaws.