recordExists Function - correct use

Hi, I am starting to use a recordExists Function (shown below) to check for existing records in a database before adding a new one. Could someone help me out with the correct way in using this:

I tried the following but it didn't seem to work:

if (recordExists == "1");
//stuff here
function recordExists($id,$idval,$table,$db) {//check for id=idval in table and return TRUE or FALSE
$result = mysql_query("SELECT * FROM ".$table." WHERE ".$id."='".$idval."'", $db) or die(mysql_error());
if($row = mysql_fetch_array($result)) {//if we did return a record
return 1;
}//end if row
return 0;
}//end function recordExists

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Use mysql_num_rows

if(mysql_num_rows($result) > 0){
//Record exists
//No record with that id exists

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Seems its all right

Try this way
  echo 'The record exist';
  echo 'The record doesn't exist';
  // stuff here

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BatemanAuthor Commented:
many thanks, seems to work!
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