当包含include（）的相对路径时，PHP检查哪些目录？ [英] Which directories does PHP check when including a relative path with include()?

问题描述

这很奇怪，有没有人得出结论呢？

It's very odd,has anyone ever sum up with a conclusion yet?

有时它也会检查所包含文件的目录。

Sometimes it checks the directory of the included file,too.

但有时不会。

D：\ test\1.php

D:\test\1.php

<?php

include('sub\2.php');

D：\ test\2.php

D:\test\2.php

<?php

include('3.php');

其中 3.php 是相同的dir as 2.php 。

Where 3.php is in the same dir as 2.php.

以上是有效的，但为什么呢？当前目录应为 D：\ test ，但它仍然可以找到3.php，它位于 D：\ test\sub

The above works,but why?The current directory should be D:\test,but it can still find 3.php,which is in D:\test\sub

更多故事（最终）

大约一年以前我遇到了这个问题，然后我最终修复了下面的硬编码：

About a year ago I met this problem,and then I ended up fixed it with the hardcoding like below:

Common.php：

Common.php:

if (file_exists("../../../Common/PHP/Config.inc"))
    include('../../../Common/PHP/Config.inc');

if (file_exists("../../Common/PHP/Config.inc"))
    include('../../Common/PHP/Config.inc');

if (file_exists("../Common/PHP/Config.inc"))
    include('../Common/PHP/Config.inc');

if (file_exists("Common/PHP/Config.inc"))
    include('Common/PHP/Config.inc');

其中 Config.inc 是相同的目录为 Common.php

推荐答案

如果你看一下您将在main / fopen_wrappers.c中找到php的源代码

If you take a look at the source code for php in main/fopen_wrappers.c you will find

/* check in calling scripts' current working directory as a fall back case
     */
    if (zend_is_executing(TSRMLS_C)) {
        char *exec_fname = zend_get_executed_filename(TSRMLS_C);
        int exec_fname_length = strlen(exec_fname);

        while ((--exec_fname_length >= 0) && !IS_SLASH(exec_fname[exec_fname_length]));
        if (exec_fname && exec_fname[0] != '[' &&
            exec_fname_length > 0 &&
            exec_fname_length + 1 + filename_length + 1 < MAXPATHLEN) {
            memcpy(trypath, exec_fname, exec_fname_length + 1);
            memcpy(trypath+exec_fname_length + 1, filename, filename_length+1);
            actual_path = trypath;

这似乎无条件执行，因此将始终使文件与包含/在同一路径中文件打开脚本可访问...作为include_path中指定的所有可能性之后的最后选择。并且只有在include（）中没有定义相对路径或绝对路径时才会这样。

This seems to be executed unconditionally and therefore will always make a file in the same path as the including/file-opening script accessible ...as the last choice after all possibilities specified in include_path. And only if you do not define a relative or absolute path in the include().

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