PHP echo在echo中 [英] PHP echo in echo

问题描述

我有一个看起来像这样的字符串:

I have a string that looks like this:

<center>
    <div style="margin-top: 10px; margin-bottom: 10px; font-size: 20px; color: #000; font-weight: bold;">
        <?php echo strlen(file_get_contents('test.txt')); ?> Applications Sent
    </div>
</center>

但是，我想用if陈述来回应这一点.例如:

However, I want to echo this with an if statment. For example:

if ($test == '') { 
    echo '<center><div style="margin-top: 10px; margin-bottom: 10px; font-size: 20px; color: #000; font-weight: bold;"><?php echo strlen(file_get_contents("test.txt")); ?> Applications Sent</div></center>';
}

问题在于这将无法正常工作，因为原始字符串中已经包含了回显.我该如何解决?

The problem is that this will not work, because the original string already has an echo in it. How can I get around this?

推荐答案

为实现此目的，您应该连接字符串.在这种情况下，您在函数周围有两个字符串-但是该函数返回一个字符串，因此将它们全部串联在一起是完全有效的.

In order to achieve this you should concatenate your strings. In this case you have two strings surrounding a function - but that function returns a string so it is perfectly valid to just concatenate them all together.

if ($test == '') { 
    echo '<center><div style="margin-top: 10px; margin-bottom: 10px; font-size: 20px; color: #000; font-weight: bold;">' . strlen(file_get_contents("test.txt")) . ' Applications Sent</div></center>';
}

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