如何检查主布局中是否定义了常量?

问题描述

我在主布局文件中有以下代码片段(protected/views/layouts/main.php):

    <?php if (defined('YII_DEBUG')) { ?>
        <button id="search-hidden-button"></button>
        <script>
            $(function(){
                $('#search-hidden-button').click(function(){
                    $('#search-query-form').submit();
                });
            });
        </script>
    <?php } ?>

但是我收到此错误，但我不知道为什么:

    <?php if (true) { ?>
        <button id="search-hidden-button"></button>
        <script>
            $(function(){
                $('#search-hidden-button').click(function(){
                    $('#search-query-form').submit();
                });
            });
        </script>
    <?php } ?>

解决方案

您按下了ALT-GR + SPACE组合键，您的编辑器将其显示为正常空间，但实际上是PHP无法解码的特殊字符. /p>

这通常发生在意大利语键盘上，其中"{"用ALT-GR + SHIFT + [印刷.当您真正快速键入内容时(就像优秀的程序员一样:)，您会这样

1. 几乎同时按下Shift和ALT-GR
2. 按[
3. 发布[
4. 发布ALT-GR和SHIFT
5. 按空格键

有时，第4步和第5步被切换，您得到了未知的角色.

删除IF语句中的所有空格，然后重试，它将被修复(然后正确重新设置空格！)

I've this snippet of code in main layout file (protected/views/layouts/main.php):

    <?php if (defined('YII_DEBUG')) { ?>
        <button id="search-hidden-button"></button>
        <script>
            $(function(){
                $('#search-hidden-button').click(function(){
                    $('#search-query-form').submit();
                });
            });
        </script>
    <?php } ?>

But I get this error and I dont know why:

    <?php if (true) { ?>
        <button id="search-hidden-button"></button>
        <script>
            $(function(){
                $('#search-hidden-button').click(function(){
                    $('#search-query-form').submit();
                });
            });
        </script>
    <?php } ?>

解决方案

You pressed a combination of ALT-GR + SPACE that your editor shows as a normal space but in fact is a special character that PHP can't decode.

This happens usually on Italian Keyboards, where "{" is printed with ALT-GR + SHIFT + [.When you type really fast (as good programmers do :) you do like this

1. Press shift and ALT-GR almost at the same time
2. Press [
3. Release [
4. Release ALT-GR and SHIFT
5. Press Spacebar

Sometimes it happens that step 4 and 5 are switched, and you get your unknown character.

Remove all spaces in your IF statements and try again, it will be fixed (then re-space correctly!)

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