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<?php $newtag = mysql_real_escape_string($_POST['newtag']); $query = "SELECT tagname FROM tags WHERE tagname = '$newtag'"; $result = mysql_query($query); if ( mysql_num_rows ( $result ) > 0 ) { /* Username already exists */ echo 'Tag already exists'; } else { /* insert it */ $query = "INSERT INTO tags (tagname) VALUES ('$newtag')"; mysql_query($query) or die(mysql_error()); } ?> |
