What i want is to combine every value from first array with every value from second array.
For example, let's take two arrays:
$array1 = ['green', 'red', 'blue'];
$array2 = ['s', 'm'];
The result array should be:
$result = [1 => 'green-s', 2 => 'green-m', 3 => 'red-s', 4 => 'red-m', 5 => 'blue-s' ...];
The result array can be different, but with that elements combined.
check this,
<?php
$array1 = array('green', 'red', 'blue');
$array2 = array('s', 'm');
$data = array();
foreach($array1 as $val){
foreach($array2 as $val2){
$data[] = $val."-".$val2;
}
}
print_r($data);
?>
Related
Say i have two different arrays. I want to get each value from the first array, and add to it some values of each key in the second array. How do i do this please?
I tried using a foreach loop inside a foreach loop and for each value in the first array, it appends each value of the second array which isn't what i want
$array1 = array(chris, kate, john, jane);
$array2 = array('first' => 1, 'second' => 2, 'third' => 3, 'fourth' => 4);
foreach($array1 as $name){
foreach($array2 as $k => $v){
echo $name . "-" . $v;
}
}
I want my output to look like this
chris-1
kate-2
john-3
jane-4
Sometimes, the count of both array aren't the same. Some values in the first array produces an empty string, so in cases like that, it should just skip the value. Once the empty string in array1 is skipped or deleted, the count then matches array2
My above nested loop can't give me this. How do i go about this please?
Firstly I would use array_filter() to remove the empty strings from $array1:
$array1 = array(chris, kate, john, jane);
$array1 = array_filter($array1, function($value) {
return $value !== '';
});
Now we need to reindex the array to account for the gaps we made when removing empty strings.
$array1 = array_values($array1);
Considering you don't use the 'first', 'second', etc keys in $array2 for anything, we can just get rid of them using array_values(). This will leave us with an array like array(1,2,3,4) which will make accessing the data later on a little easier.
$array2 = array('first' => 1, 'second' => 2, 'third' => 3, 'fourth' => 4);
$array2 = array_values($array2);
Now we can loop through the first array and access the same position in the second array to create the final string.
// Assign the current element's numeric position to the $i variable on each iteration.
foreach($array1 as $i => $name){
echo $name . "-" . $array2[$i];
}
Final Code
$array1 = ['chris', 'kate', '', 'john', 'jane'];
$array1 = array_filter($array1, function ($value) {
return $value !== '';
});
$array1 = array_values($array1);
$array2 = ['first' => 1, 'second' => 2, 'third' => 3, 'fourth' => 4];
$array2 = array_values($array2);
foreach ($array1 as $i => $name) {
echo $name . "-" . $array2[$i];
}
How to check two arrays and search for matching keys and merge the values of the 1st array with the matching keys of the second array.Please help me as I'm new to this.
example :
1st array = {id => 11,name => 'name',age => 18 }
2nd array = {id,name,age,school}
I want to get the result by adding the matching values to the 2nd array
2nd array = {id => 11,name => 'name',age => 18,school => }
try this
$a = ['id' => 11,'name' => 'name','age' => 18];
$b = array_flip(['id','name','age','school']);
foreach($b as $key => &$value){
$value = '';
}
$result = array_merge($b, $a);
One of the simple way is looping
$first= array('id' => 11,'name' => 'name','age' => 18 );
$second = array('id','name','age','school');
foreach ($second as $value) {
if(isset($first[$value])){
$final[$value] = $first[$value];
}
};
print_r($final);
Second Array flip and array merge
$first = ['id' => 11,'name' => 'name','age' => 18];
$second= array_flip(['id','name','age','school']);
foreach($second as $key => s$value){
$value = '';
}
$result = array_merge($second, $first);
print_r($result);
Use array_merge
<?php
$array1 = array('id' => '11', 'name' => 'name', 'age' => 18);
$array2 = array('id','name','age','school');
$array3 = array_merge(array_fill_keys($array2, null), $array1);
print_r($array3);
?>
I have two arrays. The one's array key is another's value. Here is code:
$arr1 = array(
'a' => 'apple',
'b' => 'banana',
'c' => 'pear',
);
$arr2 = array(
'bird' => 'a',
'dog' => 'b',
);
And my question, how to combine two arrays in one like:
$arr3 = array(
'bird' => 'apple',
'dog' => 'banana',
);
Is there have some array function to do this probably?
<?php
$arr3 = array();
foreach ($arr2 as $item => $value) {
$arr3[$item] = $arr1[$value];
}
print_r($arr3);
something along those lines anyway.
If you literally want to merge the arrays, array_merge will do the job fine.
Edit: This is a fun way and matches the keys:
$arr3 = array_combine(array_intersect_key($k = array_flip($arr2), $arr1),
array_intersect_key($arr1, $k));
Original with no key matching:
Here's a way. Doesn't matter which array is longer:
$arr3 = array_combine(array_slice(array_keys($arr2), 0, count($arr1)),
array_slice($arr1, 0, count($arr2)));
I have two arrays and I want one, can I add array 2 to array one?
$array1 = array("Germany" => 2, "Belgium"=> 3);
$array2 = array("France" => 4, "Italy"=> 5);
$final_array = {both arrays in one};
is this possible?
Yes, use the array_merge function, like this:
$final_array = array_merge($array1, $array2);
print_r($final_array);
When I run the above script it'll output:
Array (
[Germany] => 2
[Belgium] => 3
[France] => 4
[Italy] => 5
)
Take a quick read here: http://www.php.net/manual/de/function.array-merge.php
Use array_merge like
$final_arr = array_merge($array1 , $array2);
print_r($final_arr);
See this LINK for more
I would like to mention that on duplicated keys array_merge() returns the value from the second array. So, if you have different values with same keys - you should write your own function.
For example:
<?php
$a = array('rund' => '2', 'group' => '3', 'kupon' => 'utre', 'tralala' => 'shtur_kupon');
$b = array('grund' => '2', 'group' => 'ww', 'soup' => '1', 'tralala' => 'fd');
function two_arrays_merge_all_values(array $a, array $b) {
foreach ($b as $b_key => $b_value) {
$a_last_index = count($a);
$current_index = 1;
foreach ($a as $a_key => $a_value) {
if ($a_key === $b_key) {
$unique = uniqid();
$a[$b_key . '_' . $unique] = $b[$b_key];
unset($b[$b_key]);
break;
}
if ($current_index == $a_last_index) {
$a[$b_key] = $b[$b_key];
unset($b[$b_key]);
}
$current_index++;
}
}
return $a;
}
There is function array_values in PHP such that
$array2 = array_values($array1);
$array2 has the same values as $array1 but keys are from
0 to sizeof($array1) - 1. Is it possible to get mapping from old keys to new keys?
EDIT. I will explain on an example:
$array1 = array( 'a' => 'val1', 'b' => 'val1');
$array2 = array_values( $array1 );
so now array2 has next values
$array2[0] = 'val1'
$array2[1] = 'val2'
How get array3 such that:
$array3['a'] = 0
$array3['b'] = 1
To produce a key map you need to first get the keys into a regular array and then flip the keys and values:
$array1_keymap = array_flip(array_keys($array1));
For example:
$array1 = array(
'a' => 123,
'b' => 567,
);
$array1_values = array_values($array1);
$array1_keymap = array_flip(array_keys($array1));
Value of $array1_values:
array(
0 => 123,
1 => 567,
);
Value of $array1_keymap:
array(
'a' => 0,
'b' => 1,
);
So:
$array1['a'] == $array1_values[$array1_keymap['a']];
$array1['b'] == $array1_values[$array1_keymap['b']];
Yes, as simple as
$array2 = $array1;
In this case you would get both values and keys like they are in the original array.
$keyMapping = array_combine(array_keys($array1), array_keys($array2));
This the keys of $array1 and maps them to the keys of $array2 like so
<?php
$array1 = array(
'a' => '1',
'b' => '2',
);
$array2 = array_values($array1);
print_r(array_combine(array_keys($array1), array_keys($array2)));
Array
(
[a] => 0
[b] => 1
)
You can use:
$array3 = array_keys($array1);
Now $array3[$n] is the key of the value in $array2[$n] for any 0 <= $n < count($array1). You can use this to determine which keys were in which places.
If you want to keep the same value of array1 but change the key to index numbers, try this:
$array2 = array();
foreach ($array1 as $key => $value){
$array2[] = $value;
// or array_push($array2, $value);
}
var_dump($array2);