I currently have an array that looks like this:
[[{"name":"Shirt","data":[1,1,5,5,1,10000]},{"name":"Skittles","data":[1,9,1,1]}]]
I'm using:
preg_replace('/"([^"]+)"\s*:\s*/', '$1:',json_encode($results));
to create an array that should look like this:
[{"name":"Shirt","data":[1,1,5,5,1,10000]},{"name":"Skittles","data":[1,9,1,1]}]
However I can't seem to get rid of the extra set of brackets.
My model:
function get_data()
{
$this->db->select('ItemName, QuantitySold');
$query = $this->db->get('transactions');
$results = array();
foreach ($query->result_array() as $row)
{
if(!isset($results[$row['ItemName']]))
$results[$row['ItemName']] = array('name' => $row['ItemName'], 'data' => array());
$results[$row['ItemName']]['data'][] = $row['QuantitySold'];
}
//Rekey arrays so they aren't associative
$results = array_values($results);
return $results;
}
My controller:
function test()
{
$this->load->model('data');
$series_data[] = $this->data->get_data();
$data['series_data'] = json_encode($series_data, JSON_NUMERIC_CHECK);
preg_replace('/"([^"]+)"\s*:\s*/', '$1:',json_encode($series_data));
$this->load->view('chart', $data);
}
thanks in advance.
Why use preg_replace.... this is simply json encoded data:
$string = '[[{"name":"Shirt","data":[1,1,5,5,1,10000]},{"name":"Skittles","data":[1,9,1,1]}]]';
var_dump(
json_encode(
json_decode($string)[0]
)
);
Related
I've been trying to return results from 2 queries as json. var_dump($data) works but can't json_encode returns empty/ not working.
$data = array();
$array_articles = array();
$sql_articles = $mysqli->query("select something something");
while ( $article = $sql_articles->fetch_assoc() ){
$array_articles[] = $article;
}
$array_posts = array();
$sql_posts = $mysqli->query("select something something");
while ( $post = $sql_posts->fetch_assoc() ){
$array_posts[] = $post;
}
$data = array(
'top_articles' => $array_articles,
'top_posts' => $array_posts
);
echo json_encode( $data );
All the things you put in json_encode must be UTF8. I think some of the content is not UTF-8 encoded.
You can add extra parameters to json_encode.
You could give it a try like this:
echo json_encode($data, JSON_INVALID_UTF8_IGNORE | JSON_PARTIAL_OUTPUT_ON_ERROR)
I want to make a query that results like this in codeigniter MODEL:
$caldata = array (
15 => 'yes',
17 => 'no'
);
Is that possible to do?
Take NOTE: The 15,17 and yes,no are in the same database table.
There is no core helper function to achieve what you want in CI. But you can create your own helper function:
function pluck($arr = [], $val = '', $key = '')
{
// val - label for value in array
// key - label for key in array
$result = [];
foreach ($arr as $value) {
if(!empty($key)){
$result[$value[$key]] = $value[$val];
}else{
$result[] = $value[$val];
}
}
return $result;
}
you can use result_array() function so you can have something like:
$query = $this->db->select('id,answer')->from('users')->get();
$result = $query->result_array();
print_r($result);
After that you have your array and you can make the $key => $value relation of the fields
After a long search i found an answer. Sample way to do this:
$query = $this->db->select('start_date, class')->from('event')->like('start_date', "$year-$month", 'after')->get();
$datavariable = $query->result();
$caldata = array();
foreach($datavariable as $row){
$caldata[substr($row->start_date,8,2)] = $row->class;
}
$session_activity_category = array();
foreach($search_venue as $venue_b) {
$session_activity_category[] = $this->users_model->search_categories_by_session($venue_b->activity_venue_id);
}
return $this->output
->set_content_type('application/json')
->set_status_header(200)
->set_output(json_encode(array('activity_category'=>$session_activity_category,'activity'=>$session_activity,'activity_session'=>$search_session,'activity_venue'=>$search_venue),JSON_UNESCAPED_SLASHES)
);
I want to remove the arrays given in the arrow lines
Convert the JSON to the array. Then just create a new array with the same key active category (in my example, something):
<?php
$json = '
{"something": [[
{
"blah": "blah"
},
{
"blah": "blah"
}
]]}
';
$array = json_decode($json, true);
$array = [
"something" => $array['something'][0],
];
echo json_encode($array);
Which will output:
{"something":[{"blah":"blah"},{"blah":"blah"}]}
Seems that $this->users_model->search_categories_by_session($venue_b->activity_venue_id) returns array of objects. You should parse this objects to the $session_activity_category array each iteration of search_categories_by_session function call.
$session_activity_category = array();
array_walk($search_venue, function($venue_b) use (&$session_activity_category) {
$categories = $this->users_model->search_categories_by_session($venue_b->activity_venue_id);
foreach ($categories as $category) {
$session_activity_category[] = $category;
}
});
I have the following function which fetches some data from a MySQL table:
function readQuestion ($quizType, $questionId) {
$data = array();
$query = $this->dbConnection->query("SELECT * FROM $quizType WHERE id = $questionId");
foreach ($query as $row) {
var_dump($row);
};
echo $data
}
How can I push all the returned data into an array, where each member is indexed by a number?
Do I need to use echo or return at the end? They seem to have the same effect.
EDIT: Is this the correct way of returning results of the query? I am passing it to the front-end.
$questionData = $controller->readQuestion($quizType, $questionId);
return $questionData;
In general your function must looks like:
function readQuestion ($quizType, $questionId) {
$data = array();
$query = $this->dbConnection->query("SELECT * FROM $quizType WHERE id = $questionId");
return $query;
}
But, you have to look what is inside $query variable. If it is array - just return this array, if not - maybe it is some iterator, hence you have to check it and try to find method like toArray or something like that... Otherwise, you have to do something like:
$data = [];
foreach ($query as $row) {
$data[] = $row;
};
return $data;
Now you can use this function like:
var_dump(readQuestion($quizType, $questionId));
Take a look up here on how to secure your data.
Anyway, as I said in the comment you cannot use echo on an Array. And you can't do anything with the output of var_dump.
Change var_dump($row); for $data[] = $row;
and change echo $data; for return $data;
function readQuestion ($quizType, $questionId) {
$data = array();
$query = $this->dbConnection->query("SELECT * FROM $quizType WHERE id = $questionId");
foreach ($query as $row) {
$data=$row;
};
return $result;
}
I have a function as follow:
function get_employee_information()
{
$this->db
->select('id, name');
$query = $this->db->get('sales_people');
$employee_names = array();
$employee_ids = array();
foreach ($query->result() as $row) {
$employee_names[$row->id] = $row->name;
$employee_ids[] = $row->id;
}
}
I'm trying to access this data from within an output to template, like this:
$this->get_employee_information();
$output = $this->template->write_view('main', 'records', array(
'employee_names' => $employee_names,
'employee_ids' => $employee_ids,
), false);
Yet this isn't displaying anything. I feel like this is something small and I should know better. When I tun print_r($arrayname) on either array WITHIN the function, I get the suspected array values. When I print_r OUTSIDE of the function, it returns nothing.
Your function is not returning anything. Add the return shown below.
function get_employee_information()
{
$this->db->select('id, name');
$query = $this->db->get('sales_people');
$employee_names = array();
$employee_ids = array();
foreach ($query->result() as $row) {
$employee_names[$row->id] = $row->name;
$employee_ids[] = $row->id;
}
return array(
'employee_names'=>$employee_names,
'employee_ids'=>$employee_ids,
);
}
You are not setting the return value of the function to a variable
$employee_info = $this->get_employee_information();
$output =
$this->template->write_view(
'main', 'records',
array(
'employee_names' => $employee_info['employee_names'],
'employee_ids' => $employee_info['employee_ids'],
),
false
);