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¹®ÀÚ¿­ ÇÔ¼ö
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addslashes()

1)'³ª "°¡ ÀÖÀ» °æ¿ì \¸¦ ºÙ¿©ÁÖ´Â ÇÔ¼ö
    MySQL ¼­¹ö¾È¿¡ '¸¦ ³ÖÀ» ¼ö ¾ø±â ¶§¹®¿¡ »ç¿ëÇÔ. ¹®ÀåÀ» °Ë»ö½Ã "°¡ ÀÖÀ¸¸é °Ë»öÀÌ ºÒ¾ÈÁ¤ÇÔ.
2)¿¹Á¦
<?
$kk = "»ç¶ûÀÌ Áö³ªÄ¡¸é 'ÁúÅõ'°¡ µÈ´Ù";
$pp = 'ÁúÅõ°¡ Áö³ªÄ¡¸é "¹Ì¿ò"ÀÌ µÈ´Ù';
$kk = addslashes($kk);
$pp = addslashes($pp);
echo $kk."<br>";
echo $pp."<br>";

$kk = stripslashes($kk);
$pp = stripslashes($pp);
echo $kk."<br>";
echo $pp."<br>";
?>

chr()

1)ASCII ¹øÈ£¸¦ ÀÐ¾î ¹®ÀÚ¸¦ ¹ÝȯÇÏ´Â ÇÔ¼ö
2)¿¹Á¦
<?
echo "AºÎÅÍ Z±îÁö Ãâ·Â";
for($kk=65; $kk<91; $kk++)
{
  echo(chr($kk));
}
?>

crypt()

1)¹®ÀÚ¿­À» DES(Data Encryption Standard) ¾Ïȣȭ ¹æ¹ýÀ¸·Î º¯È¯ÇÏ´Â ÇÔ¼ö
2)¿¹Á¦
<?
$kk = "php";
print(crypt($kk));
?>

echo()

1)Çϳª ÀÌ»óÀÇ ¹®ÀÚ¿­À» Ãâ·ÂÇÏ´Â ÇÔ¼ö.

ereg()

1)Á¤±Ô½Ä¿¡¼­ ÁÖ¾îÁø ÆÐÅÏ¿¡ ¸Â´ÂÁö ´ë¼Ò¹®ÀÚ¸¦ ±¸ºÐÇÏ¿© °Ë»çÇÏ´Â ÇÔ¼ö.
  Á¤±ÔÇ¥Çö½Ä: À¯´Ð½º¿¡¼­ À¯·¡µÈ °ÍÀ¸·Î, ¾î¶°ÇÑ ¹®ÀÚ¿­ÀÇ ÁýÇÕÀ» Á¤È®ÇÏ°Ô ³ªÅ¸³»±â À§ÇÑ Ç¥Çö ±ÔÄ¢ÀÓ.
2)¿¹Á¦
<?
$kk =  "Mbk2000 hello";
$pattern =  "^[A-Z]{5}";
if (ereg($pattern, $kk))
{
  echo (" \"$kk\" : Âü<br>");
} else {
  echo (" \"$kk\" : °ÅÁþ<br>");  //
}
?>

ereg_replace()

1)Á¤±Ô½Ä ¹®ÀÚ¿­¿¡¼­ ƯÁ¤¹®ÀÚ¸¦ ´ë¼Ò¹®ÀÚ¸¦ ±¸ºÐÇÏ¿© ´Ù¸¥¹®ÀÚ·Î ´ëüÇÏ´Â ÇÔ¼ö.
2)¿¹Á¦
<?
$kk = "a Hello a Good Morning";
$kk = ereg_replace("a", "<br>", $kk);
echo $kk;  //Hello Ãâ·ÂÈÄ Good Morning¸¦ Ãâ·ÂÇÔ
?>

eregi()

1)Á¤±Ô½Ä¿¡¼­ ÁÖ¾îÁø ÆÐÅÏ¿¡ ¸Â´ÂÁö ´ë¼Ò¹®ÀÚ¸¦ ±¸ºÐÇÏÁö ¾Ê°í °Ë»çÇÏ´Â ÇÔ¼ö.
2)¿¹Á¦
<?
$kk =  "Mbk2000 hello";
$pattern =  "^[A-Z]{5}";
if (eregi($pattern, $kk))
{
  echo (" \"$kk\" : Âü<br>");    //
} else {
  echo (" \"$kk\" : °ÅÁþ<br>");
}
?>

eregi_replace()

1)Á¤±Ô½Ä ¹®ÀÚ¿­¿¡¼­ ƯÁ¤¹®ÀÚ¸¦ ´ë¼Ò¹®ÀÚ¸¦ ±¸ºÐÇÏÁö ¾Ê°í ´Ù¸¥¹®ÀÚ·Î ´ëüÇÏ´Â ÇÔ¼ö.
2)¿¹Á¦
<?
$kk = "a Hello A Good Morning";
$kk = eregi_replace("a", "<br>", $kk);
echo $kk;  //Hello Ãâ·ÂÈÄ Good Morning¸¦ Ãâ·ÂÇÔ
?>

explode()

1)¹®ÀÚ¿­À» ƯÁ¤¹®ÀÚ¸¦ ±âÁØÀ¸·Î ³ª´©¾î¼­, ¹è¿­·Î ÀúÀåÇÏ´Â ÇÔ¼ö.
2)¿¹Á¦
<?
$kk = "Ãß¾îÅÁ ººÀ½¹ä ¶±ºº±â";
$pp = explode(" ", $kk);
echo $pp[0]."<br>";
echo $pp[1]."<br>";
echo $pp[2];
?>

htmlspecialchars()

1)Ư¼ö¹®ÀÚµéÀ» HTML °³Ã¼·Î º¯È¯ÇÏ´Â ÇÔ¼ö
  º¯È¯ °¡´ÉÇÑ ¹®ÀÚ·Î & -> &·Î,  " -> "·Î,  < -> <·Î, > -> >·Î º¯È¯ÇÑ´Ù.
2)¿¹Á¦
<?
$fcontents = file('stdev2.php');              //ÆÄÀÏÀÇ ³»¿ëÀ» ¹è¿­·Î ¹ÞÀ½.
while (list($loc_num, $loc_line) = each($fcontents))
{
  echo "<b>Line $loc_num:</b> " . htmlspecialchars( $loc_line ) . "<br>\n";
}
?>

join()

1)¹è¿­ÀÇ ¿ø¼ÒµéÀ» ¹®ÀÚ¿­À» »ç¿ëÇÏ¿© ¿¬°áÇÏ´Â ÇÔ¼ö
2)¿¹Á¦
<?
$kk[0] = "½Öµ¿ÀÌ ";
$kk[1] = "2";
$kk[2] = " ÇüÁ¦°¡ ¶È°°¾Æ¿ä.<p>\n";
echo join("", $kk);          //½Öµ¿ÀÌ 2 ÇüÁ¦°¡ ¶È°°¾Æ¿ä. ó·³ Ãâ·ÂÇÔ.
echo join("-", $kk);        //½Öµ¿ÀÌ -2- ÇüÁ¦°¡ ¶È°°¾Æ¿ä. ó·³ Ãâ·ÂÇÔ.
?>

preg_match()

1)ÆÐÅÏ °Ë»ç¸¦ ÇÏ´Â ÇÔ¼ö. ¹®ÀÚ¿­À» ºñ±³Çؼ­ ÂüÀ̸é 1À», °ÅÁþÀ̸é 0À» ¹ÝȯÇÑ´Ù.
2)¿¹Á¦
<?
$subject = "Go To School";
$pattern = "/to/i";
if (preg_match($pattern, $subject, $matches))
  echo "¸Â´Â ÆÐÅÏÀÌ ÀÖ½À´Ï´Ù.(".$matches[0].")";  //¸Â´Â ÆÐÅÏÀÌ ÀÖ½À´Ï´Ù. (To) °¡ Ãâ·ÂµÊ.
else
  echo "¸Â´Â ÆÐÅÏÀÌ ¾ø½À´Ï´Ù.";
?>

/to/i
to¿Í ¸Â´Â ÆÐÅÏ(i´Â ´ë¼Ò¹®ÀÚ ±¸ºÐ ¾ÈÇÔ Ç¥½Ã)
  
/[abc]/
a, b, c Áß ¾î´À ÇÑ ¹®ÀÚ¿Í ¸Â´Â ÆÐÅÏ
  
/[a-z]/
aºÎÅÍ z±îÁö ¹®ÀÚÁß ÇÑ ¹®ÀÚ¿Í ¸Â´Â ÆÐÅÏ
  
/[a-zA-Z]/
aºÎÅÍ z±îÁö, AºÎÅÍ Z±îÁö Áß ÇÑ ¹®ÀÚ¿Í ¸Â´Â ÆÐÅÏ
  
/[^0-9]/
¼ýÀÚ°¡ ¾Æ´Ñ ´Ù¸¥ ÆÐÅÏ
  
/[\w]{3}/
ÀÏ¹Ý ¹®ÀÚ°¡ ¼¼ ¹ø ÀÌ»ó ¿¬¼ÓÀ¸·Î ÀÖ´Â ÆÐÅÏ
  
/[\d]{1,5}/
¼ýÀÚ°¡ 1¹ø ÀÌ»ó 5¹ø ÀÌÇÏ ¿¬¼ÓÀ¸·Î ÀÖ´Â ÆÐÅÏ
  
//[\W]{3,}/
ÀÏ¹Ý ¹®ÀÚ°¡ ¾Æ´Ñ ¹®ÀÚ°¡ 3¹ø ÀÌ»ó ¿¬¼ÓÀ¸·Î ÀÖ´Â ÆÐÅÏ
  
/?/
¹®ÀÚ°¡ ¾ø°Å³ª ÀÓÀÇÀÇ ÇÑ ¹®ÀÚ
  
/./
ÁÙ¹Ù²Þ ¹®ÀÚ°¡ ¾Æ´Ñ ÀÓÀÇÀÇ ¹®ÀÚ
  
/+/
¼±Çà ÆÐÅÏÀ» ¸¸Á·ÇÏ´Â ¹®ÀÚ(¿­)°¡ 1¹ø ÀÌ»ó ¹Ýº¹
  
/*/
¼±Çà ÆÐÅÏÀ» ¸¸Á·ÇÏ´Â ¹®ÀÚ(¿­)°¡ 1¹ø ÀÌ»ó ¹Ýº¹
  

print()

1)¹®ÀÚ¿­À» Ãâ·ÂÇÏ´Â ÇÔ¼ö

split()

1)Á¤±Ô½Ä¿¡¼­ ¹®ÀÚ¿­À» ƯÁ¤¹®ÀÚ¸¦ ±âÁØÀ¸·Î ³ª´©¾î¼­, ¹è¿­·Î ÀúÀåÇÏ´Â ÇÔ¼ö.
  explode()ÇÔ¼ö¿Í °°Àº ±â´ÉÀ» ÇÔ.
2)¿¹Á¦
<?
$kk = "Ãß¾îÅÁ ººÀ½¹ä ¶±ºº±â";
$pp = split(" ", $kk);
echo $pp[0]."<br>";
echo $pp[1]."<br>";
echo $pp[2];
?>

strcmp()

1)ÀÌÁø ¹æ½ÄÀÇ ¹®ÀÚ¿­À» ºñ±³ÇÏ´Â ÇÔ¼ö.
2)¿¹Á¦
<?
$kk = "Hello";
$pp = "Good";
if (strcmp($kk, $pp) == 0)
{
  print("°°Àº ¶æ");
} else{
  print("´Ù¸¥ ¶æ"):
}
?>

stripslashes()

1)addslashes·Î ¸¸µç ¹®ÀÚ¿­À» ´Ù½Ã ȯ¿øÇÏ´Â ÇÔ¼ö
2)¿¹Á¦
<?
$kk = "»ç¶ûÀÌ Áö³ªÄ¡¸é 'ÁúÅõ'°¡ µÈ´Ù";
$pp = 'ÁúÅõ°¡ Áö³ªÄ¡¸é "¹Ì¿ò"ÀÌ µÈ´Ù';
$kk = addslashes($kk);
$pp = addslashes($pp);
echo $kk."<br>";
echo $pp."<br>";

$kk = stripslashes($kk);
$pp = stripslashes($pp);
echo $kk."<br>";
echo $pp."<br>";
?>

strlen()

1)¹®ÀÚ¿­ÀÇ ±æÀ̸¦ ±¸ÇÏ´Â ÇÔ¼ö
2)¿¹Á¦
<?
$kk = "Hello Hello";
print(strlen($kk));  //11À» Ãâ·ÂÇÔ
?>

str_replace()

1)¹®ÀÚ¿­¿¡¼­ ƯÁ¤¹®ÀÚ¸¦ ´Ù¸¥¹®ÀÚ·Î ´ëüÇÏ´Â ÇÔ¼ö.
  ereg_replace()ÇÔ¼öº¸´Ù ¼öÇà¼Óµµ°¡ ºü¸£´Ù.
2)¿¹Á¦
<?
$kk = "a Hello a Good Morning";
$kk = str_replace("a", "<br>", $kk);
echo $kk;  //Hello Ãâ·ÂÈÄ Good Morning¸¦ Ãâ·ÂÇÔ
?>

substr()

1)¹®ÀÚ¿­¿¡¼­ ÀϺκÐÀ» ÃßÃâÇÏ¿© Ãâ·ÂÇÏ´Â ÇÔ¼ö.
  ¹®ÀÚ¿­¿¡¼­ ½ÃÀۺκРÀÌÈÄ·Î ±æÀ̸¸Å­ÀÇ ´Ü¾î¸¦ ÃßÃâÇÏ¿© Ãâ·ÂÇÔ.
2)¿¹Á¦
<?
$kk0 = 'abcdef';
$kk1 = substr("abcdef", 1);      //bcdef¸¦ Ãâ·Â
$kk2 = substr("abcdef", 1, 3);      //bcd¸¦ Ãâ·Â
$kk3 = substr("abcdef", -1);      //f¸¦ Ãâ·Â
$kk4 = substr("abcdef", -2);      //ef¸¦ Ãâ·Â
$kk5 = substr("abcdef", -3, 1);      //d¸¦ Ãâ·Â
$kk6 = substr("abcdef", 1, -1);      //bcde¸¦ Ãâ·Â
echo "$kk<p>";
echo "$kk1";
?>
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