PHP If语句始终触发为true [英] PHP If statement always firing as true

问题描述

首先，我知道这已经被问了一百万次，但我找到的答案似乎都没有用。我在'Header.php'页面中有以下if语句：

First of all, I know that this has already been asked a million times, but none of the answers I have found seem to work. I have the following if statement in my 'Header.php' page:

<?php
$currentpage = $_SERVER['REQUEST_URI'];
    echo($currentpage);
    if($currentpage == "/recap-2013.php" || "/index.php" ) { ?>
        <script src=... a bunch of HTML
<?php } ?>

如果$ currentpage等于recap-2013.php或index，则插入一些JS .php，如果没有，什么都不做。

The idea is to insert some JS if $currentpage is equal to either recap-2013.php or index.php, and if not, to do nothing.

我添加了 echo（$ currentpage） in那里检查我的 REQUEST_URI 是什么。

I've added the echo($currentpage) in there to check what my REQUEST_URI is.

问题是，即使请求URI是/someotherpage.php ，该语句的计算结果为true，JS出现在我的head标签中。我确定这是一个很小的东西我不知道但我无法弄清楚是什么。

The problem is, even if the request URI is /someotherpage.php, the statement evaluates as true and the JS appears in my head tag. I'm sure it's something small that I'm missing but I cannot figure out what.

提前感谢您的帮助！

推荐答案

你的if语句逻辑是不正确的。你的意思是：

Your if statement logic is incorrect. What you really mean is:

if($currentpage == "/recap-2013.php" || $currentpage == "/index.php" ) { ?>

在你当前的逻辑中，第二个表达式将永远为真，因为PHP有​​松散的输入，字符串将被评估作为布尔值和非空字符串始终为真。

In your current logic the second expression will always be true because PHP has loose typing the string will be evaluated as a boolean and a non-empty string is always true.

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