Array_combine remove duplicate array
<?php
$a1=array("red","red");
$a2=array("blue","yellow");
print_r(array_combine($a1,$a2));
?>
This code give output : Array ( [red] => yellow )
But I want output like this: Array ( [red] => blue [red] => yellow )
The Andreas answer is correct. you can do this:
$a1 = ['red'];
$a2 = ['blue', 'yellow'];
$a3 = [];
foreach($a1 as $item1) {
foreach($a2 as $item2) {
$a3[$item1][] = $item2;
}
}
print_r($a3);
The output:
array(1) {
["red"]=>
array(2) {
[0]=>
string(4) "blue"
[1]=>
string(6) "yellow"
}
}
Related
This question already has answers here:
Transpose 2d array, join second level with commas, and join first level with pipes
(5 answers)
Closed 7 months ago.
I have the following array.
$a = array("Algebra", "Arithmetic");
$b = array("08/01/2020", "08/02/2019");
$c = array("08/01/2020", "08/02/2019");
print_r($a);
print_r($b);
print_r($b);
and the output is
Array(
[0] => Algebra
[1] => Arithmetic
)
Array(
[0] => 08/01/2020
[1] => 08/01/2019
)
Array(
[0] => 08/02/2020
[1] => 08/02/2019
)
And I want Array in the following structure.
Array(
[0] => Algebra,08/01/2020,08/02/2020
[1] => Arithmetic,08/01/2019,08/02/2019
)
I have tried $results = array_merge_recursive($a, $b, $c); but its not giving desire output.
Thanks for help in advance.
A simple foreach loop will suffice
$a = array("Algebra", "Arithmetic");
$b = array("08/01/2020", "08/02/2019");
$c = array("08/01/2020", "08/02/2019");
foreach( $a as $i=>$v ) {
$new[] = sprintf( '%s,%s,%s', $v, $b[$i], $c[$i] );
}
Firstly, when you find yourself using sequentially-named variables it almost always means that they should actually be an array:
$a = array("Algebra", "Arithmetic");
$b = array("08/01/2020", "08/02/2019");
$c = array("08/01/2020", "08/02/2019");
$better_array = [$a, $b, $c];
var_dump($better_array);
Output:
array(3) {
[0]=>
array(2) {
[0]=>
string(7) "Algebra"
[1]=>
string(10) "Arithmetic"
}
[1]=>
array(2) {
[0]=>
string(10) "08/01/2020"
[1]=>
string(10) "08/02/2019"
}
[2]=>
array(2) {
[0]=>
string(10) "08/01/2020"
[1]=>
string(10) "08/02/2019"
}
}
Once they're in an proper array you can use array_column()
$out = [];
for($i=0, $c=count($better_array[0]); $i < $c; ++$i) {
$out[] = array_column($better_array, $i);
}
var_dump($out);
Output:
array(2) {
[0]=>
array(3) {
[0]=>
string(7) "Algebra"
[1]=>
string(10) "08/01/2020"
[2]=>
string(10) "08/01/2020"
}
[1]=>
array(3) {
[0]=>
string(10) "Arithmetic"
[1]=>
string(10) "08/02/2019"
[2]=>
string(10) "08/02/2019"
}
}
And if that comma-delimited string is what you actually want, then use implode():
$out = [];
for($i=0, $c=count($better_array[0]); $i < $c; ++$i) {
$out[] = implode(',', array_column($better_array, $i));
}
var_dump($out);
Output:
array(2) {
[0]=>
string(29) "Algebra,08/01/2020,08/01/2020"
[1]=>
string(32) "Arithmetic,08/02/2019,08/02/2019"
}
Lastly, you should avoid print_r() as it tends to produce misleading output. Eg: https://3v4l.org/ThSLb
You don't get anything built-in for this purpose. You need to build a custom function for this. You can try this-
<?php
$a = array("Algebra", "Arithmetic");
$b = array("08/01/2020", "08/01/2019");
$c = array("08/02/2020", "08/02/2019");
function mergeAssoc()
{
// You can get variable number of arguments|array by this.
$args = func_get_args();
$master = array();
foreach ($args as $arg)
{
foreach ($arg as $i => $v)
{
$master[$i][] = $v;
}
}
return $master;
}
$res = mergeAssoc($a, $b, $c);
print_r($res);
Note: It will return a multidimensional array. Not an array of comma-separated values.
Output:
Array
(
[0] => Array
(
[0] => Algebra
[1] => 08/01/2020
[2] => 08/02/2020
)
[1] => Array
(
[0] => Arithmetic
[1] => 08/01/2019
[2] => 08/02/2019
)
)
and if we use foreach then our desire output will be there with array separated by comma.
foreach ($res as $key => $value) {
$result[] = implode(',', $value);
}
and output of print_r($result); is
Array
(
[0] => Algebra,08/01/2020,08/02/2020
[1] => Arithmetic,08/01/2019,08/02/2019
)
Please help me to combine four arrays in one.
I have to compare main array keys and if the key of the secondaries arrays coincides, add them to the new array.
I tried to combine different php functions, but without the expected result and nothing relevant.
This is the main array.
[0] => Array
(
[1] => "Category1"
[2] => "Category2"
[3] => "Category3"
[4] => "Category4"
)
These are the secondaries arrays
[1] => Array
(
[1] "user_test_[1]" key 1 map to --> [1] Category1
[2] "user_test_[2]" key 2 map to --> [2] Category2
[3] "user_test_[3]" key 3 map to --> [3] Category3
[4] "user_test_[4]" key 4 map to --> [4] Category4
)
[2] => Array
(
2: "user_prod_[2]" key 2 map to --> [2] Category2
4: "user_prod_[4]" key 4 map to --> [4] Category4
)
[3] => Array
(
[3] "user_uat_[3]" key 3 map to --> [3] Category3
[4] "user_uat_[4]" key 4 map to --> [4] Category4
)
New array results in php format:
$array_result = array(
'Category1'=>array(
'user_test_[1]'
),
'Category2'=>array(
'user_test_[2]',
'user_prod_[2]'
),
'Category3'=>array(
'user_test_[3]',
'user_uat_[3]'
),
'Category4'=>array(
'user_test_[4]',
'user_prod_[4]',
'user_uat_[4]'
)
);
Main array in in php format:
$array_cat = array(1=>"Category1", 2=>"Category2", 3=>"Category3", 4=>"Category4");
These are the secondaries arrays in php fromat:
$array_usrtest = array(1=>"user_test_[1]", 2=>"user_test_[2]", 3=>"user_test_[3]", 4=>"user_test_[4]");
$array_usruat = array(3=>"user_uat_[3]", 4=>"user_uat_[4]");
$array_usrprod = array(2=>"user_prod_[2]", 4=>"user_prod_[4]");
Expected results
array{
["Category1"]=>array(1)
{
[0]=>"user_test_[1]"
}
["Category2"]=>array(2)
{
[0]=>"user_test_[2]"
[1]=>"user_prod_[2]"
}
["Category3"]=>array(3)
{
[0]=>"user_test_[3]"
[2]=>"user_uat_[3]"
}
["Category4"]=>array(3)
{
[0]=>"user_test_[4]"
[1]=>"user_prod_[4]"
[2]=>"user_uat_[4]"
}
}
Here is simple solution, which it's not very good, because it is solution for your specific values, but it is good start point and if you want, you can improve it:
<?php
$array_cat = array(1=>"Category1", 2=>"Category2", 3=>"Category3", 4=>"Category4");
$array_usrtest = array(1=>"user_test_[1]", 2=>"user_test_[2]", 3=>"user_test_[3]", 4=>"user_test_[4]");
$array_usruat = array(3=>"user_uat_[3]", 4=>"user_uat_[4]");
$array_usrprod = array(2=>"user_prod_[2]", 4=>"user_prod_[4]");
$result = [];
foreach ($array_cat as $k => $v) {
$result[$v] = []; // fill result array with categories
}
$values = array_merge($array_usrtest, $array_usruat, $array_usrprod); // merge arrays into one (all items)
foreach ($values as $k => $value) { // iterate over all values
preg_match('!\d+!', $value, $match); // get index in [index]
$result['Category' . $match[0]][] = $value; // append values to category
}
echo '<pre>';
var_dump($result);
Result:
array(4) {
["Category1"]=>
array(1) {
[0]=>
string(13) "user_test_[1]"
}
["Category2"]=>
array(2) {
[0]=>
string(13) "user_test_[2]"
[1]=>
string(13) "user_prod_[2]"
}
["Category3"]=>
array(2) {
[0]=>
string(13) "user_test_[3]"
[1]=>
string(12) "user_uat_[3]"
}
["Category4"]=>
array(3) {
[0]=>
string(13) "user_test_[4]"
[1]=>
string(12) "user_uat_[4]"
[2]=>
string(13) "user_prod_[4]"
}
}
I would say merge all array and then build the category array
$arrs = array_merge($array_usrtest, $array_usruat, $array_usrprod);
$categories = array_fill_keys($array_cat, []);
array_walk($arrs, function($item) use (& $categories){
preg_match('#(.*)\[(\d)\]#', $item, $matches);
$key = $matches[2];
$categories['Category' . $key][] = $item;
});
print_r($categories);
Based on yours answers:
<?php
$array_cat = array(1=>"Category1", 2=>"Category2", 3=>"Category3", 4=>"Category4");
$array_usrtest = array(1=>"user_test_[1]", 2=>"user_test_[2]", 3=>"user_test_[3]", 4=>"user_test_[4]");
$array_usruat = array(3=>"user_uat_[3]", 4=>"user_uat_[4]");
$array_usrprod = array(2=>"user_prod_[2]", 4=>"user_prod_[4]");
$values = array_merge($array_usrtest, $array_usruat, $array_usrprod);
$result = [];
foreach ($array_cat as $key => $cat) {
foreach ($values as $k => $value) { // iterate over all values
preg_match('!\d+!', $value, $match); // get index in [index]
if ($key == $match[0]) {
$result[$cat][] = $value; //append values to category
}
}
}
echo '<pre>';
var_dump($result);
?>
Result:
array(4) {
["Category1"]=>
array(1) {
[0]=>
string(13) "user_test_[1]"
}
["Category2"]=>
array(2) {
[0]=>
string(13) "user_test_[2]"
[1]=>
string(13) "user_prod_[2]"
}
["Category3"]=>
array(2) {
[0]=>
string(13) "user_test_[3]"
[1]=>
string(12) "user_uat_[3]"
}
["Category4"]=>
array(3) {
[0]=>
string(13) "user_test_[4]"
[1]=>
string(12) "user_uat_[4]"
[2]=>
string(13) "user_prod_[4]"
}
}
I want to update empty array .So I check is empty and want to update the original variable.So I tried by & but it doesn't change empty array $array2 .I had tried many hours but not working!!!
<?php
$array1 = array('one','two','three');
$array2 = array();
$array3 = array ('four');
$array4 = array ('five','six');
check([&$array1,&$array2,&$array3,&$array4]);
function check($arr){
foreach ($arr as $k=>$value) {
if(empty($value)){
$arr[$k][] = "nothing";
return $arr[$k];
}
else{
return $arr[$k];
}
}
}
var_dump($array2);
//actual output : empty
//expect output : 0 => string 'nothing'
?>
Have a look following code.
$array1 = array('one','two','three');
$array2 = array();
$array3 = array ('four');
$array4 = array ('five','six');
$arr11=check([&$array1,&$array2,&$array3,&$array4]);
function check($arr){
foreach ($arr as $k=>$value) {
print_r($value);
if(empty($value)){
$arr[$k] = "nothing";
}
else{
$arr[$k];
}
}
return $arr;
}
print_r($arr11);
var_dump($array2);
//actual output : empty
//expect output : 0 => string 'nothing'
It will display following result.
Array
(
[0] => Array
(
[0] => one
[1] => two
[2] => three
)
[1] => nothing
[2] => Array
(
[0] => four
)
[3] => Array
(
[0] => five
[1] => six
)
)
string(7) "nothing"
This will work for you:
<?php
$array1 = array('one','two','three');
$array2 = array();
$array3 = array ('four');
$array4 = array ('five','six');
list($array1, $array2, $array3, $array4) = check([$array1,$array2,$array3,$array4]);
function check($arr){
foreach ($arr as $k => $value) {
if(empty($value)){
$arr[$k] = "nothing";
}
}
return $arr;
}
var_dump($array2);
//actual output : string(7) "nothing"
//expect output : string(7) "nothing"
?>
You've written your function very strangely, actually.
UPDATE. Output of other arrays instead of only one.
var_dump($array1, $array2, $array3, $array4);
array(3) {
[0]=>
string(3) "one"
[1]=>
string(3) "two"
[2]=>
string(5) "three"
}
string(7) "nothing"
array(1) {
[0]=>
string(4) "four"
}
array(2) {
[0]=>
string(4) "five"
[1]=>
string(3) "six"
}
How do I print this array?
<?php
$datos = array(
array('AZUAY', array('P', 'Q'))
);
//print array
foreach ($datos as $dato1) {
foreach ($dato1 as $v2) {
echo $v2;
foreach ($v2 as $v3)
echo $v3;
}
echo "<br>";
}
?>
You can use printf() or var_dump() as a simple pretty-printer:
print_r($datos);
var_dump($datos);
Output:
print_r()
Array ( [0] => Array ( [0] => AZUAY [1] => Array ( [0] => P [1] => Q ) ) )
var_dump()
array(1) { [0]=> array(2) { [0]=> string(5) "AZUAY" [1]=> array(2) { [0]=> string(1) "P" [1]=> string(1) "Q" } } }
Something like this should work:
$datos = array(
array('AZUAY', array('P', 'Q'))
);
function printWeirdArray($array)
{
foreach($array as $i)
{
if(is_array($i))
{
printWeirdArray($i);
}
else
{
print $i."-";
}
}
}
printWeirdArray($datos);
The above code outputs:
AZUAY-P-Q-
Good luck!!
I have an array that looks like this:
array(3) {
[0]=>
array(2) {
[0]=>
string(10) "2012-11-14"
[1]=>
string(5) "3238"
}
[1]=>
array(2) {
[0]=>
string(10) "2012-11-13"
[1]=>
string(5) "3231"
}
[2]=>
array(2) {
[0]=>
string(10) "2012-11-13"
[1]=>
string(5) "3231"
}
I would like to write a foreach loop that would turn this array into:
array(2) {
[0]=>
array(1) {
"2012-11-14" => "3238"
}
[1]=>
array(1) {
"2012-11-13" => "3231"
}
So, basically, I would like to use the array element formatted as Y-M-D date as key to the second element in the array.
Given the following array...
$array = array(
0 => array(0 => "2012-11-14", 1 => "3238"),
1 => array(0 => "2012-11-13", 1 => "3231"),
2 => array(0 => "2012-11-13", 1 => "3231"),
);
putting it into a new array like this:
$new_array = array();
foreach ($array as $key => $item)
{
$new_array[$key][$item[0]] = $item[1];
}
print_r($new_array);
produces this output:
Array
(
[0] => Array
(
[2012-11-14] => 3238
)
[1] => Array
(
[2012-11-13] => 3231
)
[2] => Array
(
[2012-11-13] => 3231
)
)
My answer doesn't get rid of the duplicates, but the added dimension as specified in the original question means that duplicate dates as keys aren't an issue.
<?php
$data = array(
array("2012-11-14", "3238"),
array("2012-11-13", "3231"),
array("2012-11-13", "3231") // warning! when there are two record with same date, the second's count will be display
);
$result = array();
foreach ($data as $value) {
$result[$value[0]] = $value[1];
}
echo '<pre>';
print_r($result);
<?php
$newArray = array();
for($i=0;$i<count($arrayVariable);$i++)
{
$newArray[$arrayVariable[$i][0]] = $arrayVariable[$i][1];
}
echo '<pre>';print_r($newArray);echo '</pre>';
?>
Didn't test it but something like this should work in concept. Of course change arrayVariable to your variable.. but that aside.
You can use this code to get what you want:
$dates = array(
array("2012-11-01", "3238"),
array("2012-11-03", "4321")
);
print_r($dates);
$result = array();
foreach($dates as $value) {
$result[][$value[0]] = $value[1];
}
print_r($result);
The output will look like the requested form:
Array
(
[0] => Array
(
[2012-11-01] => 3238
)
[1] => Array
(
[2012-11-03] => 4321
)
)
Codepad demo: http://codepad.org/XAmUEdYh
However, I would personally prefer Aykut's solution. You would of course have a problem when you've got two records with the same date, but the overall array layout is a bit nicer ;).
Here is what I came up with:
<?php
$original = array(
array(
"2012-11-14",
"3238"
),
array(
"2012-11-13",
"3231"
),
array(
"2012-11-13",
"3231"
)
);
$newArray = array();
foreach($original as $subArray){
$newArray[] = array($subArray[0] => $subArray[1]);
}
var_dump($newArray);