Light SQL Injection protection

<?php
$ip = $_SERVER['REMOTE_ADDR'];
$time = date("l dS of F Y h:i:s A");
$script = $_SERVER[PATH_TRANSLATED];
$fp = fopen ("D:/MuServer/[WEB]SQL_Injection.txt", "a+");

$sql_inject_1 = array(";","'","%",'"'); #Whoth need replace
$sql_inject_2 = array("", "","","&quot;"); #To wont replace
$GET_KEY = array_keys($_GET); #array keys from $_GET
$POST_KEY = array_keys($_POST); #array keys from $_POST
$COOKIE_KEY = array_keys($_COOKIE); #array keys from $_COOKIE
/*begin clear $_GET */
for($i=0;$i<count($GET_KEY);$i++)
{
$real_get[$i] = $_GET[$GET_KEY[$i]];
$_GET[$GET_KEY[$i]] = str_replace($sql_inject_1, $sql_inject_2, HtmlSpecialChars($_GET[$GET_KEY[$i]]));
  if($real_get[$i] != $_GET[$GET_KEY[$i]])
  {
  fwrite ($fp, "IP: $ip\r\n");
  fwrite ($fp, "Method: GET\r\n");
  fwrite ($fp, "Value: $real_get[$i]\r\n");
  fwrite ($fp, "Script: $script\r\n");
  fwrite ($fp, "Time: $time\r\n");
  fwrite ($fp, "==================================\r\n");
  }
}
/*end clear $_GET */
/*begin clear $_POST */
for($i=0;$i<count($POST_KEY);$i++)
{
$real_post[$i] = $_POST[$POST_KEY[$i]];
$_POST[$POST_KEY[$i]] = str_replace($sql_inject_1, $sql_inject_2, HtmlSpecialChars($_POST[$POST_KEY[$i]]));
  if($real_post[$i] != $_POST[$POST_KEY[$i]])
  {
  fwrite ($fp, "IP: $ip\r\n");
  fwrite ($fp, "Method: POST\r\n");
  fwrite ($fp, "Value: $real_post[$i]\r\n");
  fwrite ($fp, "Script: $script\r\n");
  fwrite ($fp, "Time: $time\r\n");
  fwrite ($fp, "==================================\r\n");
  }
}
/*end clear $_POST */
/*begin clear $_COOKIE */
for($i=0;$i<count($COOKIE_KEY);$i++)
{
$real_cookie[$i] = $_COOKIE[$COOKIE_KEY[$i]];
$_COOKIE[$COOKIE_KEY[$i]] = str_replace($sql_inject_1, $sql_inject_2, HtmlSpecialChars($_COOKIE[$COOKIE_KEY[$i]]));
  if($real_cookie[$i] != $_COOKIE[$COOKIE_KEY[$i]])
  {
  fwrite ($fp, "IP: $ip\r\n");
  fwrite ($fp, "Method: COOKIE\r\n");
  fwrite ($fp, "Value: $real_cookie[$i]\r\n");
  fwrite ($fp, "Script: $script\r\n");
  fwrite ($fp, "Time: $time\r\n");
  fwrite ($fp, "==================================\r\n");
  }
}

/*end clear $_COOKIE */
fclose ($fp);
?>