为什么这些Heredoc和Nowdoc会导致错误? [英] Why do these Heredoc and Nowdoc cause errors?

问题描述

我已经找到了一些解决方案，但是不知道发生了什么事...

I've already found some solutions, but can't know what happened...

示例1:

<?php

echo <<< EOD
test
EOD;

示例2:

<?php

echo <<< 'EOD'
test
EOD;

输出1,2:

PHP Parse error:  syntax error, unexpected end of file, expecting variable (T_VARIABLE) or heredoc end (T_END_HEREDOC) or ${ (T_DOLLAR_OPEN_CURLY_BRACES) or {$ (T_CURLY_OPEN)

示例3:

<?php

echo <<< EOD
test
EOD;

?>

示例4:

<?php

echo <<< 'EOD'
test
EOD;

?>

示例5:

<?php

echo <<< EOD
test
EOD;
'dummy';

示例6:

<?php

echo <<< 'EOD'
test
EOD;
'dummy';

输出3、4、5、6:

test

推荐答案

在前两个示例中，终止符后面可能有空格，例如

You probably have spaces after the terminator in your first two examples, e.g.

EOD;[space]

与此:

<?php
echo <<<EOL
test
EOL;[space]

我收到您的错误消息，但没有空格，没有错误.不管是否有结束?>，这都是事实.

I get your error message, but WITHOUT the space, there's no error. And that's true whether there's a closing ?> or not.

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