Trouble executing multiple-table mysql query from PHP - php

Question

I am attempting to match rows in a mysql table using the values from table1.column1 and table2.column3 and then copy the value from table2.column2 into table1.column1 for each match. The query below does what I need to do, but only when I execute it manually (through phpmyadmin). When I try to execute it from PHP I receive the error Unknown column table1.column1 in 'field list'. Here is my PHP code:
<?php
mysql_connect($host,$user,$pass);
$db_selected = mysql_select_db($data);
$sql = "UPDATE table1 t1, table2 t2
SET t1.column1 = t2.column2
WHERE t1.column1 = t2.column3";
$result = mysql_query($sql);
if (!$result) {
echo mysql_error();
} ?>
I know that the mysql connection info works because I am able to execute other queries. From my research on the error it seems that I might need backticks around some part of the query but after several tries I can't figure out the correct way.
EDIT 1 - As requested here is the real query:
UPDATE wp_mf_custom_groups,wp_mf_posttypes
SET wp_mf_custom_groups.post_type=wp_mf_posttypes.type
WHERE wp_mf_custom_groups.post_type=wp_mf_posttypes.id
Outputs the error
Unknown column 'wp_mf_custom_groups.post_type' in 'field list'
Additional information I just realized might be conflicting with it. Before this happens I also renamed the table using:
RENAME TABLE wp_mf_module_groups TO wp_mf_custom_groups
Maybe since the table was just renamed it cant reference it?

Answer 1

Worked when I added backticks to the columns only after WHERE
UPDATE wp_mf_custom_groups,wp_mf_posttypes
SET wp_mf_custom_groups.post_type=wp_mf_posttypes.type
WHERE wp_mf_custom_groups.`post_type=wp_mf_posttypes.id

Answer 2

If query works with PHPmyadmin try this
<?php
$con = mysql_connect($host,$user,$pass) or die('Failed to connect');
$db_selected = mysql_select_db('db_name', $con);
$sql = "UPDATE table1 t1, table2 t2
SET t1.column1 = t2.column2
WHERE t1.column1 = t2.column3";
$result = mysql_query($sql, $con);
if (!$result) {
echo mysql_error();
} ?>