从result_array（）中提取其类型的值

Question

I want to be able to take values from a result_array() query to use in another query.

Array ( 
  [0] => Array ( [taskID] => 10 )
  [1] => Array ( [taskID] => 11 )
  [2] => Array ( [taskID] => 12 )
)

I want to be able to loop through each of the items in the array and return the value (eg 10, 11, 12) to be used in a where clause.

$task being the array and $t being the items in the array.

foreach($task as $t){
    $this->db->select('roleID');
    $this->db->from('project_tasks');
    $this->db->where('taskID', $t); //ERROR line 287
}

ERROR:

Error Number: 1054

Unknown column 'Array' in 'where clause'

SELECT roleID FROM project_roles WHERE taskID = Array

Filename: models/Project_model.php

Line Number: 287

Answer 1

foreach($task as $t){
    $this->db->select('roleID');
    $this->db->from('project_tasks');
    $this->db->where('taskID', $t['taskID']);
}

Answer 2

You're forgetting that $task is an array of arrays:

foreach($task as $t){
    $this->db->select('roleID');
    $this->db->from('project_tasks');
    $this->db->where('taskID', $t['taskID']); 
}