Adding to another array with triming few characters from string - php

Question

$data has
stdClass Object
(
[class] => srt-fields
[rules_field_1] => 1
[rules_condition_1] => 0
[rules_value_1] => text
[rules_field_2] => 3
[rules_condition_2] => 1
[rules_value_2] => another_text
...
)
Now I have another array $newdata, I need to have index $newdata['rules'] so that it should be something like:
$newdata['rules'] => array(
[field] => 1,
[condition] => 0,
[value] => text
),
array(
[field]=> 3,
[condition] =>1,
[value] => another_text
),
...
Thanks!

Answer 1

You could iterate over the properties of an object like an array:
$newdata['rules']=[];
foreach ($data as $key => $value) {
if (substr($key,0,6)=='rules_') {
// split key using '_'
$parts = explode('_',$key);
// get the 'name'
$name = $parts[1] ;
// get the index (-1 to be 0 based)
$idx = $parts[2] - 1;
// store data in new array
$newdata['rules'][$idx][$name] = $value;
}
}
print_r($newdata);
Outputs:
Array
(
[rules] => Array
(
[0] => Array
(
[field] => 1
[condition] => 0
[value] => text
)
[1] => Array
(
[field] => 3
[condition] => 1
[value] => another_text
)
)
)

Answer 2

Here is working code,
$data = [
"class" => "srt-fields",
"rules_field_1" => "1",
"rules_condition_1" => "0",
"rules_value_1" => "text",
"rules_field_2" => "3",
"rules_condition_2" => "1",
"rules_value_2" => "another_text",
];
$result = [];
foreach ($data as $k => $v) {
$num = filter_var($k, FILTER_SANITIZE_NUMBER_INT);
if (!empty($num)) {
$result['rules'][$num][(str_replace(['rules_', '_'], '', preg_replace('/[0-9]+/', '', $k)))] = $v;
}
}
$result['rules'] = array_values($result['rules']);
print_r($result);
str_replace — Replace all occurrences of the search string with the replacement string
filter_var — Filters a variable with a specified filter
preg_replace — Perform a regular expression search and replace
str_replace — Replace all occurrences of the search string with the replacement string
Here is working demo.

Answer 3

Definitely do not use regular expressions for this task -- because it is unnecessary resource overhead. Explode the keys on underscores, and use the individual components to construct the multi-level keys in your output array.
Code: (Demo)
$data = (object)[
"class" => "srt-fields",
"rules_field_1" => "1",
"rules_condition_1" => "0",
"rules_value_1" => "text",
"rules_field_2" => "3",
"rules_condition_2" => "1",
"rules_value_2" => "another_text"
];
foreach ($data as $key => $value) {
$bits = explode('_',$key); // this will produce a 1-element array from `class` and a 3-element array from others
if (isset($bits[2])) { // if element [2] exists, then process the qualifying data
$newdata[$bits[0]][$bits[2]-1][$bits[1]] = $value;
// ^^- make zero based
}
}
var_export($newdata);
Output:
array (
'rules' =>
array (
0 =>
array (
'field' => '1',
'condition' => '0',
'value' => 'text',
),
1 =>
array (
'field' => '3',
'condition' => '1',
'value' => 'another_text',
),
),
)
I am using -1 to make the output keys resemble a zero-based / indexed array. If your fields might not be consecutively ordered, you can remove the -1 and write $newdata['rules'] = array_values($newdata['rules']); after the loop.

Answer 4

$i = 0;
$j = 0;
foreach($data as $key=>$value){
if($j == 0)
{
$newdata['rules'][$i]['field'] = $value;
}
if($j == 1)
{
$newdata['rules'][$i]['condition'] = $value;
}
if($j == 2)
{
$newdata['rules'][$i]['value'] = $value;
$i++;
}
$j++;
if($j > 2)
{
$j = 0;
}
}
You can try this code. Please ignore syntax error as I have not tried this code but it should give you the result.