PHP, MySQL search by keyword from multiple tables - php

Question

I have code like this:
function search_keyword(){
$keyword = trim($_POST['keyword']);
$search_explode = explode(" ", $keyword);
$x = 0;
$sql = " ( SELECT name AS type FROM global_info WHERE ";
foreach($search_explode as $each){
$x++;
if($x == 1){
$sql .= " name LIKE '%$each%'";}
else {
$sql .= " name LIKE '%$each%' ";
}
}
$sql .= " ) UNION ALL ";
$sql .= " ( SELECT name AS type FROM person WHERE ";
foreach($search_explode as $each){
$x++;
if($x == 1){
$sql .= " name LIKE '%$each%'";}
else {
$sql .= " name LIKE '%$each%' ";
}
}
$sql .= " ) UNION ALL ";
$sql .= "( SELECT name AS type FROM event WHERE ";
foreach($search_explode as $each){
$x++;
if($x == 1){
$sql .= " name LIKE '%$each%'";}
else {
$sql .= " name LIKE '%$each%' ";
}
}
$sql .= " ) ";
$q = $this->db->query($sql);
return $q = $q->num_rows() == 0 ? FALSE : $q->result();
}
The function is working. What I don't know is how to know which data is from which table, and then to show the results on the page?

Answer 1

Perhaps, adding a field to the results of each SELECT.
function search_keyword(){
$keyword = trim($_POST['keyword']);
$search_explode = explode(" ", $keyword);
$x = 0;
$sql = " ( SELECT name AS type, \"table_global_info\" as mytable FROM global_info WHERE ";
foreach($search_explode as $each){
$x++;
if($x == 1){
$sql .= " name LIKE '%$each%'";}
else {
$sql .= " name LIKE '%$each%' ";
}
}
$sql .= " ) UNION ALL ";
$sql .= " ( SELECT name AS type, \"person\" as mytable FROM person WHERE ";
foreach($search_explode as $each){
$x++;
if($x == 1){
$sql .= " name LIKE '%$each%'";}
else {
$sql .= " name LIKE '%$each%' ";
}
}
$sql .= " ) UNION ALL ";
$sql .= "( SELECT name AS type, \"event\" as mytable FROM event WHERE ";
foreach($search_explode as $each){
$x++;
if($x == 1){
$sql .= " name LIKE '%$each%'";}
else {
$sql .= " name LIKE '%$each%' ";
}
}
$sql .= " ) ";
$q = $this->db->query($sql);
return $q = $q->num_rows() == 0 ? FALSE : $q->result();
}
Regards!

Answer 2

In select statement insert anew column that identifies the table:
SELECT name AS type, 'tab_x' as from_table FROM global_info WHERE
....
SELECT name AS type, 'tab_x1' as from_table FROM global_info WHERE
when you use the returned values check the "from_table" field to see the orginal table the result come from