Question

I’m having following data

$field  = 'f1','f2','f3'; // (comma separated string)
$value = 'v1','v2','v3'; // (comma separated string)

Is there any shortcut method to generate update query like this.

UPDATE table set ($field = $value) where id =1;

This method is working on insert query, But i dont know how to use like this for update query.

Answer 1

I think the best way to approach things like this is by storing the data in associative arrays, not strings like you have used:

$data = array(
  'f1' => 'v1',
  'f2' => 'v2',
  'f3' => 'v3'
);

// Then for an insert:
$query = "INSERT INTO table (`".implode("`, `", array_keys($data))."`) VALUES ('".implode("', '", array_values($data))."')";

// And an update
$updates = array();
foreach ($data as $key => val) $updates[] = "`$key` = '$val'";
$query = "UPDATE table SET ".implode(', ',$updates)." WHERE `id` = 1";

// Or even a select
$where = array();
foreach ($data as $key => val) $where[] = "`$key` = '$val'";
$query = "SELECT * FROM table WHERE ".implode(' AND ',$where);

If you are doing this, you need to ensure that you escape the data as you build the array. Or better yet, use prepared statements.