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string trim ( string $str [, string $charlist ] )
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•charlist°¡ ÁöÁ¤µÇÁö ¾ÊÀ¸¸é ¾Æ·¡¿Í °°Àº ¹®ÀÚµéÀÌ Á¦°ÅµÊ
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string number_format ( float $number [, int $decimals = 0 ] )
string number_format ( float $number , int $decimals = 0 , string $dec_point = '.' , string $thousands_sep = ',' )
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•decimals´Â ¼Ò¼öÁ¡ Ç¥Çö°¹¼öÀ̸ç, ³¡¿¡¼­ ¹Ý¿Ã¸² 󸮵Ê
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•±Ý¾×µîÀ» Ç¥½ÃÇÒ¶§ õ´ÜÀ§ ÄÞ¸¶ Ç¥Çö Çü½Ä¿¡ È°¿ë


string htmlspecialchars ( string $string [, int $flags = ENT_COMPAT [, string $charset [, bool $double_encode = true ]]] )
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•ENT_NOQUOTESÀÌ¸é µû¿ÈÇ¥´Â º¯È¯ÇÏÁö ¾Ê´Â´Ù
•'&' -> '&' , '"' -> '"' , ''' -> ''' , '<' -> '<' , '>' -> '>' ·Î º¯È¯µÊ
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string htmlentities ( string $string [, int $flags = ENT_COMPAT [, string $charset [, bool $double_encode = true ]]] )
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•ÇÑ±Û ±úÁüÀÌ ¹ß»ýÇÏ´Â °æ¿ì htmlspecialchars() ÇÔ¼ö¸¦ ÀÌ¿ë


string nl2br ( string $string [, bool $is_xhtml = true ] )
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string strip_tags ( string $str [, string $allowable_tags ] )
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•allowable_tags¿¡ Á¦°ÅÇÏÁö ¾ÊÀ» ÅÂ±× ÁöÁ¤ °¡´ÉÇϳª HTMLÁÖ¼®°ú PHPű״ º¯°æ ¾ÈµÊ
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string addslashes ( string $str )

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•µû¿ÈÇ¥('), ÀÌÁßµû¿ÈÇ¥("), ¹é½½·¡½Ã(\), NUL(NULL ¹ÙÀÌÆ®)À» À̽ºÄÉÀÌÇÁ ½ÃÅ´
•get_magic_quotes_gpc()·Î È®ÀÎÇÏ¿© trueÀÏ °æ¿ì GET, POST, COOKIE µ¥ÀÌÅÍ¿¡ ÀÚµ¿ À̽ºÄÉÀÌÇÁ µÈ´Ù
•µû¶ó¼­, addslashes()¸¦ »ç¿ëÇϸé Áߺ¹ À̽ºÄÉÀÌÇÁ°¡ µÇ´Ï »ç¿ëÇÏÁö ¸»°Í


string stripslashes ( string $str )
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•get_magic_quotes_gpc() ±â´ÉÀÌ È°¼ºÈ­µÇ¾îÀÖ´Â °æ¿ì ³Ñ¾î¿Â ÀڷḦ HTML¿¡ ¹Ù·Î Ãâ·ÂÇÏ´Â °æ¿ìµî¿¡ È°¿ë
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string mysql_real_escape_string ( string $unescaped_string [, resource $link_identifier ] )
•unescaped_string ¹®ÀÚ¿­¿¡¼­ mysql_query() ½ÇÇà½Ã ¾ÈÀüÇÑ ÁúÀǹ®À¸·Î º¯È¯ÇÏ¿© ¹ÝȯÇÑ´Ù (PHP4 >= 4.3.0, PHP5)
•\x00, \n, \r, \, ', ", \x1a ¹®ÀÚ¿¡ ¹é½½·¡½Ã¸¦ ºÙÀδÙ
•link_identifierÀº ¿¬°áµÈ µ¥ÀÌÅͺ£À̽º ¿¬°á¸µÅ©¸¦ ³Ñ°ÜÁÖ¾î¾ß ÇÏ°í, DB°¡ ¿¬°áµÈ »óÅ¿¡¼­¸¸ ÇÔ¼ö ÀÌ¿ëÀÌ °¡´É
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string sprintf ( string $format [, mixed $args [, mixed $... ]] )
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