I have loop like this
foreach($this->input->post('users') as $value)
{
foreach($this->input->post('group_name') as $v)
{
echo $value.','.$v.'<br>';
}
}
And its ouput is
17,5
17,6
18,5
18,6
19,5
19,6
20,5
20,6
Now i want to create an associative array like this using the above values.
array(
array(
'user_id' => 17,
'group_id' => 15
),
....
....
array(
'user_id' => 20,
'group_id' => 6
)
)
How can i do that
I've tried this in foreach loop but it will print two separate arrays.
$temp['user_id'][]=$v;
$temp['group_id'][]=$value;
All you have to do is append array with respective values.
$result = [];
foreach($this->input->post('users') as $value)
{
foreach($this->input->post('group_name') as $v)
{
$result[] = ['user_id' => $value, 'group_id' => $v];
}
}
var_dump($result);
This loop should help you out.
$resultArray = [];
foreach($this->input->post('users') as $value) {
foreach($this->input->post('group_name') as $v) {
$resultArray[] = array(
'user_id' => $value,
'group_id' => $v,
);
}
}
var_dump($resultArray);
It's very simple, you just have to append/push the child array into main array.
Like this,
$main_array=array();
foreach($this->input->post('users') as $value)
{
foreach($this->input->post('group_name') as $v)
{
$group_array=array();
$group_array["group_id"]=$v;
$group_array["user_id"]=$value;
$main_array[]=$group_array;
//echo $value.','.$v.'<br>';
}
}
print_r($group_array);
You may also use array_push() to push child array into main array.
Syntax for that would be,
array_push($main_array, $child_array);
Can u try this
$temp = array();
foreach($this->input->post('users') as $key=>$value)
{
foreach($this->input->post('group_name') as $v)
{
$temp[$key]['user_id']=$v;
$temp[$key]['group_id']=$value;
}
}
print_r($temp);
Related
How can I add all the columnar values by associative key? Note that key sets are dynamic and some key value is more than one.
Example array :
$myArray = array(
["apple" => 2,"orange" => 1,"lemon" => 4,"grape" => 5],
["apple" => 5,"orange" => 0,"lemon" => 3,"grape" => 2],
["apple" => 3,"orange" => 0,"lemon" => 1,"grape" => 3],
);
With single key value I can sum the column value easily with the code below.
$sumArray = array();
foreach ($myArray as $k => $subArray)
{
foreach ($subArray as $id => $value)
{
if (array_key_exists($id, $sumArray))
{
$sumArray[$id] += $value;
} else {
$sumArray[$id] = $value;
}
}
}
echo json_encode($sumArray);
the result will be like these:
{"apple":10,"orange":1,"lemon":8,"grape":10}
For multiple key values the code above is not working. How to sum column values if key value is more than one?
Example array:
$myArraymulti = array(
["apple" => 2,"orange" => 1,"lemon" => [4, 2],"grape" => 5],
["apple" => 5,"orange" => [0, 2],"lemon" => 3,"grape" => 2],
["apple" => 3,"orange" => 0,"lemon" => 1,"grape" => [3, 8]],
);
Desired result:
{"apple":10,"orange":3,"lemon":10,"grape":18}
Check if the value is an array. If it is, use the sum of the elements instead of the value itself when adding to the associative array.
foreach ($myArray as $k => $subArray)
{
foreach ($subArray as $id => $value)
{
if (is_array($value)) {
$value_to_add = array_sum($value);
} else {
$value_to_add = $value;
}
if (array_key_exists($id, $sumArray))
{
$sumArray[$id] += $value_to_add;
} else {
$sumArray[$id] = $value_to_add;
}
}
}
I suggest you fix your data structure, though. You should just make every value an array, rather than mixing singletons and arrays, so you don't have to use conditionals in all the code that processes the data.
$keys = [];
forEach($myArraymulti as $array){
$keys = array_merge(array_keys($array), $keys);
}
$res = [];
forEach(array_unique($keys) as $key){
forEach($myArraymulti as $array){
if(isset($array[$key])){
$res[$key] = (isset($res[$key]) ? $res[$key] : 0) +
(is_array($array[$key]) ? array_sum($array[$key]) : $array[$key]);
}
}
}
$res = json_encode($res));
This question already has answers here:
Group 2d array rows by one column and sum another column [duplicate]
(3 answers)
Closed 4 months ago.
I have a multi array that has some duplicated values that are same by name ( name is an element )
i want to sum quantity of each array that has same name , and then unset the second array
Example :
<?php
$Array=array(
0=>array("name"=>"X","QTY"=>500),
1=>array("name"=>"y","QTY"=>250),
2=>array("name"=>"X","QTY"=>250)
);
?>
Now i want to sum duplicated values as below.
Result :
<?php
$Array=array(
0=>array("name"=>"X","QTY"=>750),
1=>array("name"=>"y","QTY"=>250)
);
?>
UPDATED
i found this function to search in array , foreach and another loops does not works too
<?php
function search($array, $key, $value)
{
$results = array();
if (is_array($array)) {
if (isset($array[$key]) && $array[$key] == $value) {
$results[] = $array;
}
foreach ($array as $subarray) {
$results = array_merge($results, search($subarray, $key, $value));
}
}
return $results;
}
?>
<?php
$Array=array(
0=>array("name"=>"X","QTY"=>500),
1=>array("name"=>"y","QTY"=>250),
2=>array("name"=>"X","QTY"=>250)
);
$result = array();
$names = array_column($Array, 'name');
$QTYs = array_column($Array, 'QTY');
$unique_names = array_unique($names);
foreach ($unique_names as $name){
$this_keys = array_keys($names, $name);
$qty = array_sum(array_intersect_key($QTYs, array_combine($this_keys, $this_keys)));
$result[] = array("name"=>$name,"QTY"=>$qty);
}
var_export($result); :
array (
0 =>
array (
'name' => 'X',
'QTY' => 750,
),
1 =>
array (
'name' => 'y',
'QTY' => 250,
),
)
Try this simplest one, Hope this will be helpful.
Try this code snippet here
$result=array();
foreach ($Array as $value)
{
if(isset($result[$value["name"]]))
{
$result[$value["name"]]["QTY"]+=$value["QTY"];
}
else
{
$result[$value["name"]]=$value;
}
}
print_r(array_values($result));
Try this, check the live demo.
<?php
$Array=array(
0=>array("name"=>"X","QTY"=>500),
1=>array("name"=>"y","QTY"=>250),
2=>array("name"=>"X","QTY"=>250)
);
$keys = array_column($Array, 'name');
$QTYs = array_column($Array, 'QTY');
$result = [];
foreach($keys as $k => $v)
{
$result[$v] += $QTYs[$k];
}
print_r($result);
You can achieve this by creating an array with name as key and then iterating over all values and add them together, resulting in this
function sum_same($array) {
$keyArray = [];
foreach ($array as $entry) {
$name = $entry["name"];
if(isset($keyArray[$name])) {
$keyArray[$name] += $entry["QTY"];
} else {
$keyArray[$name] = $entry["QTY"];
}
}
// Convert the keyArray to the old format.
$resultArray = [];
foreach ($keyArray as $key => $value) {
$resultArray[] = ["name" => $key, "QTY" => $value];
}
return $resultArray;
}
Try the code here
If you want to alter the old array use the function like this:
$myArray = sum_same($myArray);
The old array will be overwritten by the new one.
This problem is a classic example of usage for array_reduce():
$Array = array(
0 => array('name' => 'X', 'QTY' => 500),
1 => array('name' => 'y', 'QTY' => 250),
2 => array('name' => 'X', 'QTY' => 250),
);
// array_values() gets rid of the keys of the array produced by array_reduce()
// they were needed by the callback to easily identify the items in the array during processing
$Array = array_values(array_reduce(
$Array,
function (array $a, array $v) {
$k = $v['name'];
// Check if another entry having the same name was already processed
// Keep them in the accumulator indexed by name
if (! array_key_exists($k, $a)) {
$a[$k] = $v; // This is the first entry with this name
} else {
// Not the first one; update the quantity
$a[$k]['QTY'] += $v['QTY'];
}
return $a; // return the partial accumulator
},
array() // start with an empty array as accumulator
));
I was wondering when working with multimedional arrays, if a certain key is the same, is there a way to combine the contents of other keys into its own array if a certain key is the same?
Something like this:
// name is the same in both arrays
array(
array(
'name' => 'Pepsi',
'store' => 'Over here',
'number' => '1234567'
),
array(
'name' => 'Pepsi',
'store' => 'Over here',
'number' => '5556734'
)
)
into something like this
array(
array(
'name' => 'Pepsi',
'store' => array('Over here', 'Over here'),
'number' => array('1234567', '5556734')
)
)
The defining key is checking if the name element is the same for the other arrays.
You can try a function like this.
function mergeByKey($array,$key){
$tmp_array = array();
foreach ( $array as $k => $row ) {
$merged = false;
foreach ($tmp_array as $k2 => $tmp_row){
if ($row[$key] == $tmp_row[$key]){
foreach ( $row as $k3 => $value ) {
if ($k3 == $key) continue;
$tmp_array[$k2][$k3][] = $value;
$merged = true;
}
}
if ($merged) break;
}
if (!$merged) {
$new_row = array();
foreach ( $row as $k4 => $value ) {
if ($k4 == $key) $new_row[$k4] = $value;
else $new_row[$k4] = array($value);
}
$tmp_array[] = $new_row;
}
}
foreach ( $tmp_array as $t => $row ) {
foreach ( $row as $t2 => $value ) {
if ( count($value) == 1 && $t2 != $key ) $tmp_array[$t][$t2] = $value[0];
}
}
return $tmp_array;
}
passing the array as first parameter and the key as second one.
I'm referencing to your array structure
edited: missed a piece
edited2: if resultin array contains elements with one string, it returns a string and not a array with one element
demo
This function uses a given field name as the grouping identifier and turns all other fields into arrays.
Note that single occurrences of your field name will yield arrays with a single element for the other fields. I wasn't sure whether that's a desirable trait, but just making sure you know ;-)
$arr = array(
array(
'name' => 'Pepsi',
'store' => 'Over here',
'number' => '1234567'
),
array(
'name' => 'Pepsi',
'store' => 'Over here',
'number' => '5556734'
)
);
function mergeArray($array, $column)
{
$res = array();
foreach ($array as $item) {
foreach ($item as $key => $value) {
if ($key === $column) {
$res[$column][$key] = $value;
} else {
$res[$column][$key][] = $value;
}
}
}
return array_values($res);
}
print_r(mergeArray($arr, 'name'));
Demo
Thanks to Gianni Lovece for her answer but I was able to develop a much simpler solution based on this problem. Just plug in the $result_arr to browse through and the $key you want to use as basis and it immediately outputs a multidimensional array with non-repeating values for repeating elements (see example below).
function multiarray_merge($result_arr, $key){
foreach($result_arr as $val){
$item = $val[$key];
foreach($val as $k=>$v){
$arr[$item][$k][] = $v;
}
}
// Combine unique entries into a single array
// and non-unique entries into a single element
foreach($arr as $key=>$val){
foreach($val as $k=>$v){
$field = array_unique($v);
if(count($field) == 1){
$field = array_values($field);
$field = $field[0];
$arr[$key][$k] = $field;
} else {
$arr[$key][$k] = $field;
}
}
}
return $arr;
}
For example, in the sample array for this question, running multiarray_merge($mysample, 'name') returns
array(
'Pepsi' => array(
'name' => 'Pepsi',
'store' => 'Over here', // String: Not an array since values are not unique
'number' => array('1234567', '5556734') // Array: Saved as array since values are unique
)
);
I use the following code to fill all empty keys in sub-arrays with ``:
$array = array(
'note' => array('test', 'test1'),
'year' => array('2011','2010', '2012'),
'type' => array('conference', 'journal', 'conference'),
);
foreach ($array['type'] as $k => $v) {
foreach($array as $element => $a) {
$iterator = $array[$element];
if(!isset($iterator[$k])){
$iterator[$key] = '';
}
}
}
print_r($array);
The problem is that it is not actually changing the elements in $array but in temporary variable $iterator.
I know that this is a simple question but I would like to find out the best and fastest solution.
You don't need the $iterator variable, you can do just:
foreach ($array['type'] as $k => $v) {
foreach($array as $element => $a) {
if(!isset($array[$element][$k])){
$array[$element][$key] = '';
}
}
}
I would also recommending switching the inner and outer loops, so it's more readable and more efficient.
foreach($array as $element => $a) {
foreach ($array['type'] as $k => $v) {
if(!isset($array[$element][$k])){
$array[$element][$key] = '';
}
}
}
Looks like you have some typos. $key in the middle of the loops is never defined.
$a should be the same value as $iterator[$k], so no need to set it.
Try this.
$array = array(
'note' => array('test', 'test1'),
'year' => array('2011','2010', '2012'),
'type' => array('conference', 'journal', 'conference'),
);
foreach ($array as $k => $v) {
foreach($k as $element => $a) {
if(!isset($a)){
$array[$element] = '';
}
}
}
In an array such as the one below, how could I rename "fee_id" to "id"?
Array
(
[0] => Array
(
[fee_id] => 15
[fee_amount] => 308.5
[year] => 2009
)
[1] => Array
(
[fee_id] => 14
[fee_amount] => 308.5
[year] => 2009
)
)
foreach ( $array as $k=>$v )
{
$array[$k] ['id'] = $array[$k] ['fee_id'];
unset($array[$k]['fee_id']);
}
This should work
You could use array_map() to do it.
$myarray = array_map(function($tag) {
return array(
'id' => $tag['fee_id'],
'fee_amount' => $tag['fee_amount'],
'year' => $tag['year']
); }, $myarray);
$arrayNum = count($theArray);
for( $i = 0 ; $i < $arrayNum ; $i++ )
{
$fee_id_value = $theArray[$i]['fee_id'];
unset($theArray[$i]['fee_id']);
$theArray[$i]['id'] = $fee_id_value;
}
This should work.
Copy the current 'fee_id' value to a new key named 'id' and unset the previous key?
foreach ($array as $arr)
{
$arr['id'] = $arr['fee_id'];
unset($arr['fee_id']);
}
There is no function builtin doing such thin afaik.
This is the working solution, i tested it.
foreach ($myArray as &$arr) {
$arr['id'] = $arr['fee_id'];
unset($arr['fee_id']);
}
The snippet below will rename an associative array key while preserving order (sometimes... we must). You can substitute the new key's $value if you need to wholly replace an item.
$old_key = "key_to_replace";
$new_key = "my_new_key";
$intermediate_array = array();
while (list($key, $value) = each($original_array)) {
if ($key == $old_key) {
$intermediate_array[$new_key] = $value;
}
else {
$intermediate_array[$key] = $value;
}
}
$original_array = $intermediate_array;
Converted 0->feild0, 1->field1,2->field2....
This is just one example in which i get comma separated value in string and convert it into multidimensional array and then using foreach loop i changed key value of array
<?php
$str = "abc,def,ghi,jkl,mno,pqr,stu
abc,def,ghi,jkl,mno,pqr,stu
abc,def,ghi,jkl,mno,pqr,stu
abc,def,ghi,jkl,mno,pqr,stu;
echo '<pre>';
$arr1 = explode("\n", $str); // this will create multidimensional array from upper string
//print_r($arr1);
foreach ($arr1 as $key => $value) {
$arr2[] = explode(",", $value);
foreach ($arr2 as $key1 => $value1) {
$i =0;
foreach ($value1 as $key2 => $value2) {
$key3 = 'field'.$i;
$i++;
$value1[$key3] = $value2;
unset($value1[$key2]);
}
}
$arr3[] = $value1;
}
print_r($arr3);
?>
I wrote a function to do it using objects or arrays (single or multidimensional) see at https://github.com/joaorito/php_RenameKeys.
Bellow is a simple example, you can use a json feature combine with replace to do it.
// Your original array (single or multi)
$original = array(
'DataHora' => date('YmdHis'),
'Produto' => 'Produto 1',
'Preco' => 10.00,
'Quant' => 2);
// Your map of key to change
$map = array(
'DataHora' => 'Date',
'Produto' => 'Product',
'Preco' => 'Price',
'Quant' => 'Amount');
$temp_array = json_encode($original);
foreach ($map AS $k=>$v) {
$temp_array = str_ireplace('"'.$k.'":','"'.$v.'":', $temp);
}
$new_array = json_decode($temp, $array);
Multidimentional array key can be changed dynamically by following function:
function change_key(array $arr, $keySetOrCallBack = [])
{
$newArr = [];
foreach ($arr as $k => $v) {
if (is_callable($keySetOrCallBack)) {
$key = call_user_func_array($keySetOrCallBack, [$k, $v]);
} else {
$key = $keySetOrCallBack[$k] ?? $k;
}
$newArr[$key] = is_array($v) ? array_change_key($v, $keySetOrCallBack) : $v;
}
return $newArr;
}
Sample Example:
$sampleArray = [
'hello' => 'world',
'nested' => ['hello' => 'John']
];
//Change by difined key set
$outputArray = change_key($sampleArray, ['hello' => 'hi']);
//Output Array: ['hi' => 'world', 'nested' => ['hi' => 'John']];
//Change by callback
$outputArray = change_key($sampleArray, function($key, $value) {
return ucwords(key);
});
//Output Array: ['Hello' => 'world', 'Nested' => ['Hello' => 'John']];
I have been trying to solve this issue for a couple hours using recursive functions, but finally I realized that we don't need recursion at all. Below is my approach.
$search = array('key1','key2','key3');
$replace = array('newkey1','newkey2','newkey3');
$resArray = str_replace($search,$replace,json_encode($array));
$res = json_decode($resArray);
On this way we can avoid loop and recursion.
Hope It helps.