I work with a CMS (Drupal 8). It automatically generates some multidimensional array with an unique value, like this :
//var_dump of my $array
array (size=1)
0 =>
array (size=1)
'value' => string '50' (length=2)
To date, I use this ugly way for automatically get the value (in example : "50") of these arrays :
array_shift(array_values(array_shift(array_values($array))))
My question is, is there a better way in php for get that ?
So you know it's an array in an array?
$value = reset(reset($array));
You don't know how many turtles arrays are nested?
$value = $array;
while(is_array($value))
$value = reset($array);
Docs on reset
Just use via index:
$array[0]['value']
Related
I have a string:
01;Tommy;32;Coder&&02;Annie;20;Seller
I want it like this:
array (size=2)
0 =>
array (size=4)
0 => string '01' (length=2)
1 => string 'Tommy' (length=5)
2 => int 42
3 => string 'Coder' (length=5)
1 =>
array (size=4)
0 => string '02' (length=2)
1 => string 'Annie' (length=5)
2 => int 20
3 => string 'Seller' (length=6)
Hope you can help me, thank you!
Not sure if the datatypes will be matching (as I believe it's all in a string) but here's the code
$myarray = array();
foreach(explode("&&",$mystring) as $key=>$val)
{
$myarray[] = explode(";",$val);
}
The explode command takes a string and turns it into an array based on a certain 'split key' which is && in your case
but since this is a dual array, I had to pass it through a foreach and another explode to solve.
It's very simple. First you need to explode the string by && and then traverse through array exploded by &&. And explode each element of an array by ;.
Like this,
<?php
$str="01;Tommy;32;Coder&&02;Annie;20;Seller";
$array=explode("&&",$str);
foreach($array as $key=>$val){
$array[$key]=explode(";",$val);
}
print_r($array);
Demo: https://eval.in/629507
you should just have to split on '&&', then split the results by ';' to create your new two dimensional array:
// $string = '01;Tommy;32;Coder&&02;Annie;20;Seller';
// declare output
$output = [];
// create array of item strings
$itemarray = explode('&&',$string);
// loop through item strings
foreach($itemarray as $itemstring) {
// create array of item values
$subarray = explode(';',$itemstring);
// cast age to int
$subarray[2] = (int) $subarray[2]; // only useful for validation
// push subarray onto output array
$output[] = $subarray;
}
// $output = [['01','Tommy',32,'Coder'],['02','Annie',20,'Seller']];
keep in mind that since php variables are not typed, casting of strings to ints or keeping ints as strings will only last depending on how the values are used, however variable type casting can help validate data and keep the wrong kind of values out of your objects.
good luck!
There is another appropach of solving this problem. Here I used array_map() with anonymous function:
$string = '01;Tommy;32;Coder&&02;Annie;20;Seller';
$result = array_map(function($value){return explode(';',$value);}, explode('&&', $string));
Take a look at the following code:
$a = json_decode('{"0":"xy"}', true);
This will return an associative array like [0 => "xy"].
Is there a way not to automatically convert the keys to numbers? The result I'd like to have would be the array ["0" => "xy"] with strings as keys exclusively.
First decode it as an object (without true parameter) and then typecast it as array:
$a = (array) json_decode('{"0":"xy"}');
var_dump($a);
Ouput:
array (size=1)
'0' => string 'xy' (length=2)
Not really sure why you would want numerical array keys to be strings. It can make life harder when trying to search through an array by key or rekey the array.
However, if you really want your keys to be strings this should help
$array = json_decode('{"0":"xy"}', true);
foreach($array as $key => $value) {
$newArray[(string) $key] = $value;
}
I have an item object in PHP, which has the following structure on var_dump :
$item->properties:
array (size=1)
1 =>
array (size=4)
'Key1' => string 'Value1' (length=6)
'Key2' => int 1
'Key3' => string 'true' (length=4)
'Key4' => string 'true' (length=4)
I want to access Key, value in a foreach loop and assign Key, value pair to some internal variables, however when i am using the foloowing code to loop pver array of array, i am getting error in accessing the values in the way i want. Here is what i am doing :
foreach($item->properties as $property) {
foreach($property as $value) {
echo $value;
}
}
Anyone have an idea what am i doing wrong, and how can i fix that ?
one of the things you provide to the foreach isn't a a valid argument, as the error says. Find out which of the 2 it is (linenumber) and var_dump that argument to see what type it is (probably "not an array" ).
In the end either $item->properties itself, or the array values of that array (if it is one), so $property is not an array.
It could be, for instance, that maybe the first key of the properties IS an array, but the second isn't? then you could use is_array to check.
This question already has answers here:
How to get an array of specific "key" in multidimensional array without looping [duplicate]
(4 answers)
Closed 1 year ago.
I have a multidimensional array, that has say, x number of columns and y number of rows.
I want specifically all the values in the 3rd column.
The obvious way to go about doing this is to put this in a for loop like this
for(i=0;i<y-1;i++)
{
$ThirdColumn[] = $array[$i][3];
}
but there is an obvious time complexity of O(n) involved here. Is there a built in way for me to simply extract each of these rows from the array without having to loop in.
For example (this does not work offcourse)
$ThirdColumn = $array[][3]
Given a bidimensional array $channels:
$channels = array(
array(
'id' => 100,
'name' => 'Direct'
),
array(
'id' => 200,
'name' => 'Dynamic'
)
);
A nice way is using array_map:
$_currentChannels = array_map(function ($value) {
return $value['name'];
}, $channels);
and if you are a potentate (php 5.5+) through array_column:
$_currentChannels = array_column($channels, 'name');
Both results in:
Array
(
[0] => Direct
[1] => Dynamic
)
Star guests:
array_map (php4+) and array_column (php5.5+)
// array array_map ( callable $callback , array $array1 [, array $... ] )
// array array_column ( array $array , mixed $column_key [, mixed $index_key = null ] )
Is there a built in way for me to simply extract each of these rows from the array without having to loop in.
Not yet. There will be a function soon named array_column(). However the complexity will be the same, it's just a bit more optimized because it's implemented in C and inside the PHP engine.
Try this....
foreach ($array as $val)
{
$thirdCol[] = $val[2];
}
Youll endup with an array of all values from 3rd column
Another way to do the same would be something like $newArray = array_map( function($a) { return $a['desiredColumn']; }, $oldArray ); though I don't think it will make any significant (if any) improvement on the performance.
You could try this:
$array["a"][0]=10;
$array["a"][1]=20;
$array["a"][2]=30;
$array["a"][3]=40;
$array["a"][4]=50;
$array["a"][5]=60;
$array["b"][0]="xx";
$array["b"][1]="yy";
$array["b"][2]="zz";
$array["b"][3]="aa";
$array["b"][4]="vv";
$array["b"][5]="rr";
$output = array_slice($array["b"], 0, count($array["b"]));
print_r($output);
Lets say I have an multidimensional string array:
.food = array(
'vegetable' => array(
'carrot' => 'blablue',
'potato' => 'bluebla',
'cauliflower' => 'blabla'
),
'Fruit' => array(
'apple' => 'chicken65',
'orange' => 'salsafood',
'pear' => 'lokkulakka'
)
);
is it possible to access the array by using index as numbers, instead of using the name of the key?
So for accessing chicken65 , I will type echo $food[1][0]; I don't want to use numbers as key, because its a big array and its more user-friendly if I use string as key and it will let me do for-loops on advanced level.
You can do foreach loops to achieve much the same thing as a typical for-loop.
foreach ($foods as $key => $value) {
//For the first iteration, $key will equal 'vegetable' and $value will be the array
}
$food[1][0] != $food[1]['apple'], so you cannot use numeric keys in this case.
try
$new_array = array_values($food);
however, variable can't start with .. It should start with $
you may want to try the function array_values but since you are dealing with multidemsional arrays, here is a solution posted by a php programmer
http://www.php.net/manual/en/function.array-values.php#103905
but it would be easier to use foreach instead of for.
You can use array_keys() on the array. The resulting array can be traversed via a for-loop and gives you the associative key.
I will show it to you for the first dimension:
$aTest = array('lol' => 'lolval', 'rofl' => 'roflval');
$aKeys = array_keys($aTest);
$iCnt = count($aKeys);
for($i = 0; $i < $iCnt; ++$i)
{
var_dump($aTest[$aKeys[$i]]);
}
You would need to do this for two dimensions but I would not recommend this. It is actually more obstrusive and slower than most other solutions.
I don't think there is something native to go this route.
And it does seem like you are trying to stretch array use a bit.
You should go OOP on this one.
Create a FoodFamilly object and a Food object in which you can store arrays if necessary and you'll be able to write a nice user-friendly code and add indices if needed.
OOP is almost always the answer :)