Description:
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i try to save php source code in database but it can't be save and display syntax error in sql statment

Reproduce code:
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<form method=\"post\" action=\"$PHP_SELF?action=doinsert\">
<textarea dir=\"ltr\" name=\"funexampls\" rows=\"60\" cols=\"50\"></textarea><br>
<input type=\"submit\" name=\"$submit\">
if ($submit){
         $result= mysql_query("insert into functions values ('$funexampls')") or die (mysql_error() );;


Expected result:
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i'm try to wirte this php code in textarea

<?php
if (!isset($_COOKIE))$counter1=1;
setcookie('login2',$counter);
$counter=$_COOKIE[login2]+1;
setcookie('login2',$counter);
echo $counter;
?>
to be save in database
but this error massage display:

You have an error in your SQL syntax. Check the manual that corresponds to your MySQL server version for the right syntax to use near 'login2',$counter); $counter=$_COOKIE[login2]+1; setcookie('lo