Question

to save my web crawler position that how many pages it crawled i try to save them it in database so that next time it start from the position where it was stoped

first i have table checkpoint with 2 columns id and check

my first step is to get old position from database and store it in $i

$result = mysql_query( "SELECT * FROM checkpoint" ) or die("SELECT Error: ".mysql_error());
while($ch_me = mysql_fetch_assoc($result))
{
    $i=$ch_me["check"];
            echo "<br>i value in loop ".$i;
            break;  // need just first check value in db
}

next i have to increment $i value and have to update it into database

while(1)
{   // doing work 
    $i++;
    // save i value in database
    mysql_query("UPDATE `checkpoint` SET `id`=1,`check`=$i WHERE 1");

}

now problem i a facing is with update query … it cant update $i value to databse ????? strage it was working for first time then when i run next time , not working

Answer 1

where in update missing

$result = mysql_query( "SELECT * FROM checkpoint limit 1" ) or die("SELECT Error: ".mysql_error());
$ch_me = mysql_fetch_array($result);
$i=$ch_me['check'];
$id = $ch_me['id'];
$i+=1;

mysql_query("UPDATE checkpoint SET check=$i WHERE id=$id");