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(PHP 4, PHP 5, PHP 7)

system — ¿ÜºÎ ÇÁ·Î±×·¥À» ½ÇÇàÇÏ°í Ãâ·ÂÀ» Ç¥½ÃÇÏ´Â

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string system ( string $command [, int &$return_var ] )
system() ´Â ÁöÁ¤ÇÑ command ¸¦ ½ÇÇàÇÏ°í °á°ú¸¦ Ãâ·ÂÇÏ´Â C¾ð¾îÀÇ systemÇÔ¼ö¸¦ ´à¾Ò½À´Ï´Ù.

PHP¸¦ ¼­¹ö ¸ðµâ·Î¼­ ½ÇÇàÇÏ´Â °æ¿ì, system() ÄݷεéÀ» Ãâ·ÂÇÑ µÚ Web¼­¹öÀÇ Ãâ·Â ¹öÆÛ°¡ ÀÚµ¿ÀûÀ¸·Î Á¦°ÅµË´Ï´Ù.

¸í·ÉÀ» ½ÇÇàÇÏ°í, ¾Æ¹«·± °¡°øµµ ÇÏÁö ¾Ê°í ¸ðµç µ¥ÀÌÅ͸¦ ¸í·É¿¡¼­ Á÷Á¢ µ¹·ÁÁÙ ÇÊ¿ä°¡ ÀÖ´Â °æ¿ì,passthru() ÇÔ¼ö¸¦ »ç¿ëÇϼ¼¿ä.

ÆĶó¹ÌÅÍ
command
½ÇÇàÇÏ´Â ¸í·É.

return_var
Àμö°¡return_var Á¸ÀçÇÒ °æ¿ì ½ÇÇàÇÑ ¸í·É¾îÀÇ °±À» À§»óÀÌ ÀÌ º¯¼ö¿¡ ¾¹´Ï´Ù.

¹Ýȯ °ª
¼º°ø ¶§´Â ¸í·É Ãâ·ÂÀÇ ¸¶Áö¸· ÇàÀ» µ¹·ÁÁÖ°í ½ÇÆÐ ½ÃFALSE ¸¦ °±°Ú½À´Ï´Ù.

¿¹
»ç·Ê 1system() ÀÇ ¿¹

<?php
echo '<pre>';

// ¼Ð ¸í·É¾î "ls" ÀÇ ¸ðµç °á°ú¸¦ Ãâ·ÂÇÏ°í Ãâ·ÂÀÇ ¸¶Áö¸·
// ÇàÀ» $last_line ¿¡ °Ý³³ÇÕ´Ï´Ù. ¼Ð ¸í·É¾îÀÇ µ¹¾Æ°¡´Â °ªÀº
// $retval ¿¡ ÀúÀåµË´Ï´Ù.
$last_line = system('ls', $retval);

// Ãß°¡ Á¤º¸¸¦ Ç¥½ÃÇÕ´Ï´Ù.
echo '
</pre>
<hr />Last line of the output: ' . $last_line . '
<hr />Return value: ' . $retval;
?>
ÁÖÀÇ
°æ°í
»ç¿ëÀÚ°¡ ÀÔ·ÂÇÑ µ¥ÀÌÅ͸¦ ÀÌ ÇÔ¼ö¿¡ Áֱ⸦ Çã¿ëÇÏ´Â °æ¿ì »ç¿ëÀÚ°¡ ÀÓÀÇÀÇ Ä¿¸àµå¸¦ ½ÇÇàÇÒ ¼ö ÀÖµµ·Ï ½Ã½ºÅÛÀ» ¼ÓÀÏ ¸øÇÏ°Ôescapeshellarg() ¶Ç´Â escapeshellcmd() ¸¦ Àû¿ëÇÒ ÇÊ¿ä°¡ ÀÖ½À´Ï´Ù.

ÁÖÀÇ:

ÇÁ·Î±×·¥ÀÌ ÀÌ ÇÔ¼ö·Î ½ÃÀÛµÉ °æ¿ì ¹è°æÀ¸·Î 󸮸¦ ÁøÇà½ÃÅ°´Â¿¡´Â ÇÁ·Î±×·¥ÀÇ Ãâ·ÂÀ» ÆÄÀÏÀ̳ª ´Ù¸¥ Ãâ·Â ½ºÆ®¸²¿¡ ¹æÇâ ¼öÁ¤ÇÒ ÇÊ¿ä°¡ ÀÖ½À´Ï´Ù. ¾È ±×·¯¸é ÇÁ·Î±×·¥ÀÌ ½ÇÇàÀ» ¸¶Ä¥ ¶§±îÁö PHP´Â Çà ÇÕ´Ï´Ù.
ÁÖÀÇ: ¼¼ÀÌÇÁ ¸ðµå°¡ À¯È¿ÇÑ °æ¿ì safe_mode_exec_dir ¾È¿¡ ÀÖ´Â ½ÇÇà ÇÁ·Î±×·¥¸¸À» ½ÇÇà °¡´ÉÇÕ´Ï´Ù. ½ÇÁ¦ÀûÀÎ ÀÌÀ¯·Î ÇöÀç ½ÇÇà ÇÁ·Î±×·¥¿¡ ´ëÇÑ Æнº¸¦.. Æ÷ÇÔÇÒ ¼ö ¾ø½À´Ï´Ù.
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¼¼ÀÌÇÁ ¸ðµå°¡ À¯È¿ÇÑ °æ¿ì ¸í·É ¹®ÀÚ¿­Àº escapeshellcmd() ±×·¡¼­ È®ÀåµË´Ï´Ù. Áï,´Âecho y | echo x ,echo y \| echo x ÀÔ´Ï´Ù.
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