Question

I have a mySQL table that has a column like this:

ID
-----
0352
5432
4382
3520
30593
3992
295

I want to detect if a specific number exists or not.

Note: This table has more than just the ID column.

e.g.

$num = 5432
if($num IS IN ID) {
 // code
} else {
 // code
}

Answer 1

$result = mysql_query("SELECT ID FROM table WHERE ID = '5432'");
$num_rows = mysql_num_rows($result);

if ($num_rows > 0) {
  // number is in the table
} else {
  // number is not in the table
}