Deleted problems do not show any more zombie entries!

Closes #4

Author: ngsankha

admin/profile.php

@@ -49,12 +49,14 @@
        	while($row = mysql_fetch_array($result)) {
        		$sql = "SELECT name FROM problems WHERE sl=".$row['problem_id'];
        		$res = mysql_query($sql);
-       		$field = mysql_fetch_array($res);
-       		echo("<tr><td><a href=\"#\" onclick=\"$('#area').load('preview.php', {action: 'code', uname: '".$_GET['uname']."', id: '".$row['problem_id']."', name: '".$field['name']."'});\">".$field['name']."</a></td><td><span class=\"badge badge-info\">".$row['attempts']);
-       		if($row['status'] == 1)
-       			echo("</span></td><td><span class=\"label label-warning\">Attempted</span></td></tr>\n");
-       		else if($row['status'] == 2)
-       			echo("</span></td><td><span class=\"label label-success\">Solved</span></td></tr>\n");
+       		if(mysql_num_rows($res) != 0) {
+       			$field = mysql_fetch_array($res);
+	       		echo("<tr><td><a href=\"#\" onclick=\"$('#area').load('preview.php', {action: 'code', uname: '".$_GET['uname']."', id: '".$row['problem_id']."', name: '".$field['name']."'});\">".$field['name']."</a></td><td><span class=\"badge badge-info\">".$row['attempts']);
+       			if($row['status'] == 1)
+       				echo("</span></td><td><span class=\"label label-warning\">Attempted</span></td></tr>\n");
+       			else if($row['status'] == 2)
+       				echo("</span></td><td><span class=\"label label-success\">Solved</span></td></tr>\n");
+       		}
        	}
       ?>
       </tbody>

submissions.php

@@ -40,12 +40,14 @@
        	while($row = mysql_fetch_array($result)) {
        		$sql = "SELECT name FROM problems WHERE sl=".$row['problem_id'];
        		$res = mysql_query($sql);
-       		$field = mysql_fetch_array($res);
-       		echo("<tr><td><a href=\"solve.php?id=".$row['problem_id']."\">".$field['name']."</a></td><td><span class=\"badge badge-info\">".$row['attempts']);
-       		if($row['status'] == 1)
-       			echo("</span></td><td><span class=\"label label-warning\">Attempted</span></td></tr>\n");
-       		else if($row['status'] == 2)
-       			echo("</span></td><td><span class=\"label label-success\">Solved</span></td></tr>\n");
+       		if(mysql_num_rows($res) != 0) {
+       			$field = mysql_fetch_array($res);
+	       		echo("<tr><td><a href=\"solve.php?id=".$row['problem_id']."\">".$field['name']."</a></td><td><span class=\"badge badge-info\">".$row['attempts']);
+       			if($row['status'] == 1)
+       				echo("</span></td><td><span class=\"label label-warning\">Attempted</span></td></tr>\n");
+       			else if($row['status'] == 2)
+       				echo("</span></td><td><span class=\"label label-success\">Solved</span></td></tr>\n");
+       		}
        	}
       ?>
       </tbody>