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$string = preg_replace ("/[ #\&\+\-%@=\/\\\:;,\.'\"\^`~\_|\!\?\*$#<>()\[\]\{\}]/i", "", $string);





string trim ( string $str [, string $charlist ] )
•ÁÖ¾îÁø ¹®ÀÚ¿­ÀÇ ¾ÕµÚ °ø¹éÀ» Á¦°Å (PHP4, PHP5)
•charlist°¡ ÁöÁ¤µÇÁö ¾ÊÀ¸¸é ¾Æ·¡¿Í °°Àº ¹®ÀÚµéÀÌ Á¦°ÅµÊ
•" "(°ø¹é), "\t"(ÅÇ), "\n"(°³Çà), "\r"(Äɸ®Áö¸®ÅÏ), "\0"(³Î¹ÙÀÌÆ®), "\x0B"(¼öÁ÷ÅÇ)À» Á¦°Å
•À§ÀÇ °ø¹é ¹× ÅǵîÀº ¹®ÀÚ¿­ ¾Õ,µÚ¿¡ Àִ°æ¿ì¿¡¸¸ 󸮵Ê


string number_format ( float $number [, int $decimals = 0 ] )
string number_format ( float $number , int $decimals = 0 , string $dec_point = '.' , string $thousands_sep = ',' )
•ÁÖ¾îÁø ¼ýÀÚ¸¦ ÁöÁ¤µÈ Çü½Ä¿¡ ¸Â°Ô ¹Ýȯ (PHP4, PHP5)
•decimals´Â ¼Ò¼öÁ¡ Ç¥Çö°¹¼öÀ̸ç, ³¡¿¡¼­ ¹Ý¿Ã¸² 󸮵Ê
•dec_point´Â ¼Ò¼öÁ¡ÀÇ Ç¥Çö¹®ÀÚÀ̸ç, thousands_sep´Â õ´ÜÀ§¸¶´Ù ±¸ºÐ ¹®ÀÚ¸¦ ÁöÁ¤ÇÔ
•±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 ]]] )
•Æ¯¼ö ¹®ÀÚ¸¦ HTML¿£Æ¼Æ¼·Î º¯È¯
•HTML¿¡¼­ Ưº°ÇÑ Àǹ̸¦ °®´Â ¸î°¡Áö Ư¼ö¹®ÀÚ¿¡ ´ëÇÏ¿© ¿£Æ¼Æ¼·Î º¯È¯ÈÄ ¹Ýȯ
•flags°¡ ENT_COMPATÀ̸é Å«µû¿ÈÇ¥(")¸¸ º¯È¯, ENT_QUOTESÀ̸é ÀÛÀºµû¿ÈÇ¥('), Å«µû¿ÈÇ¥(") ¸ðµÎ º¯È¯
•ENT_NOQUOTESÀÌ¸é µû¿ÈÇ¥´Â º¯È¯ÇÏÁö ¾Ê´Â´Ù
•'&' -> '&' , '"' -> '"' , ''' -> ''' , '<' -> '<' , '>' -> '>' ·Î º¯È¯µÊ
•charset´Â ¹®Àڼ ÁöÁ¤


string htmlentities ( string $string [, int $flags = ENT_COMPAT [, string $charset [, bool $double_encode = true ]]] )
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•HTML ¹®ÀÚ ¿£Æ¼Æ¼¿¡ Á¸ÀçÇÏ´Â ¸ðµç ¹®ÀÚ¸¦ ¿£Æ¼Æ¼·Î º¯È¯ÇÏ´Â Á¡À» Á¦¿ÜÇϸé htmlspecialchars()¿Í ¿ÏÀüÈ÷ µ¿ÀÏ
•ÇÑ±Û ±úÁüÀÌ ¹ß»ýÇÏ´Â °æ¿ì htmlspecialchars() ÇÔ¼ö¸¦ ÀÌ¿ë


string nl2br ( string $string [, bool $is_xhtml = true ] )
•¸ðµç ÁÙ¹Ù²Þ ¾Õ¿¡ '<br />'À̳ª <br>À» »ðÀÔÈÄ ¹Ýȯ (PHP4, PHP5)



string strip_tags ( string $str [, string $allowable_tags ] )
•ÁÖ¾îÁø str¿¡¼­ ¸ðµç HTML°ú PHP ű׸¦ Á¦°ÅÇÑ ¹®ÀÚ¿­À» ¹Ýȯ (PHP4, PHP5)
•fgetss() ÇÔ¼ö¿Í µ¿ÀÏ ÅÂ±× Á¦°Å ¹æ½ÄÀ» °¡Áü
•allowable_tags¿¡ Á¦°ÅÇÏÁö ¾ÊÀ» ÅÂ±× ÁöÁ¤ °¡´ÉÇϳª HTMLÁÖ¼®°ú PHPű״ º¯°æ ¾ÈµÊ
•<a> ű׵îÀ¸·Î ¸µÅ©¸¦ º¸³¾°æ¿ì¸¦ ´ëºñÇÏ¿© Å©·Î½º»çÀÌÆ® ½ºÅ©¸³Æ® °ø°ÝÀ» ¹æÁöÇÑ´Ù


string addslashes ( string $str )

•µ¥ÀÌÅͺ£À̽º ÁúÀǵ¼­ ó¸®ÇÒ ÇÊ¿ä°¡ ÀÖ´Â ¹®ÀÚ ¾Õ¿¡ ¹é½½·¡½Ã¸¦ ºÙÀÎ ¹®ÀÚ¿­À» ¹Ýȯ (PHP4, PHP5)
•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 )
•¹é½½·¡½Ã(\) ó¸®µÈ ¹®ÀÚ¿­À» ¹é½½·¡½Ã¸¦ Á¦°ÅÈÄ ¹Ýȯ (PHP4, PHP5)
•get_magic_quotes_gpc() ±â´ÉÀÌ È°¼ºÈ­µÇ¾îÀÖ´Â °æ¿ì ³Ñ¾î¿Â ÀڷḦ HTML¿¡ ¹Ù·Î Ãâ·ÂÇÏ´Â °æ¿ìµî¿¡ È°¿ë
•get_magic_quotes_gpc() ÇÔ¼ö°¡ trueÀΰæ¿ì ÀÌÇÔ¼ö¸¦ ÀÌ¿ëÈÄ mysql_real_escape_string() ÇÔ¼ö¸¦ »ç¿ë


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
•¼º°ø½Ã À̽ºÄÉÀÌÇÁµÈ ¹®ÀÚ¿­À» ¹ÝȯÇÏ°í, ½ÇÆнà FALSE¸¦ ¹Ýȯ


string sprintf ( string $format [, mixed $args [, mixed $... ]] )
•Çü½ÄÈ­ÇÑ ¹®ÀÚ¿­À» ¹Ýȯ (PHP4, PHP5)
•format ¹®ÀÚ¿­¿¡´Â %´ÙÀ½¿¡ ³ª¿À´Â ÁöÁ¤¾î¿¡ µû¶ó Àμö¸¦ ¾î¶² ÇüÀ¸·Î Ãë±ÞÇÒÁö °áÁ¤
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