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, PHP 7, PHP 8)
chdir — ディレクトリを変更する
パラメータ
directory-
新しいカレントディレクトリ
エラー / 例外
失敗した場合は E_WARNING レベルのエラーが発生します。
例
例1 chdir() の例
<?php
// カレントディレクトリ
echo getcwd() . "\n";
chdir('public_html');
// カレントディレクトリ
echo getcwd() . "\n";
?>上の例の出力は、 たとえば以下のようになります。
/home/vincent /home/vincent/public_html
注意
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)
