stream_resolve_include_path
(PHP 5 >= 5.3.2, PHP 7, PHP 8)
stream_resolve_include_path — Resolve filename against the include path
说明
stream_resolve_include_path(string
$filename): string|false
Resolve filename against the include path according to the same rules as fopen()/include.
参数
-
filename -
The filename to resolve.
返回值
Returns a string containing the resolved absolute filename, 或者在失败时返回 false.
范例
示例 #1 stream_resolve_include_path() example
Basic usage example.
<?php
var_dump(stream_resolve_include_path("test.php"));
?>
以上例程的输出类似于：
string(22) "/var/www/html/test.php"
add a note
User Contributed Notes 5 notes
zelnaga at gmail dot com ¶
8 years ago
In case you're running a version of PHP that doesn't have this function...
if (!function_exists('stream_resolve_include_path')) {
/**
* Resolve filename against the include path.
*
* stream_resolve_include_path was introduced in PHP 5.3.2. This is kinda a PHP_Compat layer for those not using that version.
*
* @param Integer $length
* @return String
* @access public
*/
function stream_resolve_include_path($filename)
{
$paths = PATH_SEPARATOR == ':' ?
preg_split('#(?<!phar):#', get_include_path()) :
explode(PATH_SEPARATOR, get_include_path());
foreach ($paths as $prefix) {
$ds = substr($prefix, -1) == DIRECTORY_SEPARATOR ? '' : DIRECTORY_SEPARATOR;
$file = $prefix . $ds . $filename;
if (file_exists($file)) {
return $file;
}
}
return false;
}
}
tambet dot matiisen at gmail dot com ¶
9 years ago
stream_resolve_include_path() seems to cache it's output. After I renamed a file, I had to restart Apache for stream_resolve_include_path() to not return non-existing file name. This was on Windows.
kawewong at gmail dot com ¶
1 year ago
In some case like this, you can't use `realpath()` or `file_exists()` without resolve its path.
Example:
file.php
subfolder/
..|- included.php
..|- subfolder/
.........|- another-included.php
file.php contents:
```
<?php
var_dump(file_exists('subfolder/included.php'));// true
include 'subfolder/included.php';
?>
```
subfolder/included.php contents:
```
<?php
var_dump(file_exists('subfolder/another-included.php'));// false but the file is really exists.
var_dump(file_exists(stream_resolve_include_path('subfolder/another-included.php')));// with `stream_resolve_include_path()` function, it returns true now.
include 'subfolder/another-included.php';// working fine, no errors.
?>
```
subfolder/subfolder/another-included.php contents:
```
<?php
echo 'Hello world';
?>
```
sebastian dot krebs at kingcrunch dot de ¶
11 years ago
It really behaves like `include` and will only resolve the filename against the include-path, if the path is relative. It makes not much sense to resolve already absolute pathnames anyway.
kontakt at victorjonsson dot se ¶
10 years ago
This seems to be a great alternative to file_exists.
if( file_exists(__DIR__.'/som-file.php') )
Goes way slower than:
if( stream_resolve_inlcude_path(__DIR__.'/som-file.php') !== false)
备份地址：http://www.lvesu.com/blog/php/function.stream-resolve-include-path.php