When working with FFI under a PHP ZTS environment, there is no standard way to change the directory with libraries (dll/so/dylib/etc), so to get around this problem, you should use something like this polyfill:
<?php
$directory = 'path/to/libraries';
switch (\PHP_OS_FAMILY) {
case 'Windows':
\FFI::cdef('extern unsigned char SetDllDirectoryA(const char* lpPathName);', 'kernel32.dll')
->SetDllDirectoryA($directory)
;
break;
case 'Linux':
case 'BSD':
\FFI::cdef('int setenv(const char *name, const char *value, int overwrite);')
->setenv('LD_LIBRARY_PATH', $directory, 1)
;
break;
case 'Darwin':
\FFI::cdef('int setenv(const char *name, const char *value, int overwrite);')
->setenv('DYLD_LIBRARY_PATH', $directory, 1)
;
break;
}
?>
chdir
(PHP 4, PHP 5)
chdir — Change directory
說明
bool chdir
( string
$directory
)
Changes PHP's current directory to
directory.
參數
-
directory -
The new current directory
回傳值
如果成功則回傳 TRUE，失敗則回傳 FALSE。
錯誤/例外
Throws an error of level E_WARNING on failure.
範例
Example #1 chdir() example
<?php
// current directory
echo getcwd() . "\n";
chdir('public_html');
// current directory
echo getcwd() . "\n";
?>
上例的輸出類似於：
/home/vincent /home/vincent/public_html
註釋
Note: 當安全模式被啟用時，PHP 將檢查被操作的目錄是否和正在執行的腳本有相同的 UID（擁有者）。
add a note
User Contributed Notes 3 notes
nesk at xakep dot ru ¶
3 years ago
php dot duke at qik dot nl ¶
15 years ago
When changing dir's under windows environments:
<?php
$path="c:\temp"';
chdir($path);
/* getcwd() gives you back "c:\temp" */
$path="c:\temp\"';
chdir($path);
/* getcwd() gives you back "c:\temp\" */
?>
to work around this inconsistency
doing a chdir('.') after the chdir always gives back "c:\temp"
herwin at snt dot utwente dot nl ¶
17 years ago
When using PHP safe mode and trying to change to a dir that is not accessible due to the safe mode restrictions, the function simply fails without generating any kind of error message.
(Tested in PHP 4.3.10-16, Debian Sarge default)
