(PHP 4, PHP 5)
posix_getgid — ｸｽｺﾟ､ﾎ･ﾗ･愠ｻ･ｹ､ﾎｼﾂｺﾝ､ﾎ･ｰ･�ｼ･ﾗ ID ､ﾖ､ｹ
ｸｽｺﾟ､ﾎ･ﾗ･愠ｻ･ｹ､ﾎｼﾂｺﾝ､ﾎ･ｰ･�ｼ･ﾗ ID ､ﾖ､ｷ､ﾞ､ｹ｡｣
ｼﾂｺﾝ､ﾎ･ｰ･�ｼ･ﾗ ID ､ｽ､ｹﾀｰｿﾍ､ﾖ､ｷ､ﾞ､ｹ｡｣
ﾎ�1 posix_getgid() ､ﾎﾎ�
､ｳ､ﾎﾎ网ﾇ､ﾏ｡｢ｼﾂ･ｰ･�ｼ･ﾗ ID ､ｽｼｨ､ｷ｡｢ ｼﾂｸ妺ｰ･�ｼ･ﾗ ID ､ﾑｹｹ､ｷ､ｿｸ螟ﾇｺﾆﾅﾙｼﾂ･ｰ･�ｼ･ﾗ ID ､ｽｼｨ､ｷ､ﾞ､ｹ｡｣ have changed your effective group id.
<?php
echo 'ｼﾂ･ｰ･�ｼ･ﾗ ID ､ﾏ '.posix_getgid(); //20
posix_setegid(40);
echo 'ｼﾂ･ｰ･�ｼ･ﾗ ID ､ﾏ '.posix_getgid(); //20
echo 'ｼﾂｸ妺ｰ･�ｼ･ﾗ ID ､ﾏ '.posix_getegid(); //40
?>