I want to turn plain array into two dimensional array. I can do it with a code below but is there native PHP function to handle it. I went through the manual and wen but didn't see anything.
Thanks
$array = array('a', 'b');
Should be converted into:
$array = array('a'=>'a', 'b'=>'b');
I don't want to use this if there is a simple function:
foreach($array as &$value)
{
$new[$value] = $value;
}
You can use array_combine(), which combines (suprisingly enough) an array of keys and an array of values into a single array.
$array = array_combine($array, $array);
Related
I have an array in the array, and I want to make it just one array, and I can easily retrieve that data
i have some like
this
but the coding only combines the last value in the first array, not all values
is it possible to make it like that?
so that I can take arrays easily
I would make use of the unpacking operator ..., combined with array_merge:
$array['test2'] = array_merge(...array_merge(...$array['test2']));
In your case you need to flatten exactly twice, if you try to do it one time too much it will fail due to the items being actual arrays themselves (from PHP's perspective).
Demo: https://3v4l.org/npnTi
Use array_merge (doc) and ... (which break array to separate arrays):
function flatten($arr) {
return array_merge(...$arr);
}
$arr = [[["AAA", "BBB"]], [["CCC"]]];
$arr = flatten(flatten($arr)); // using twice as you have double depth
In your case, $arr is $obj["test2"]. If your object is json cast it to array first and if it is a string use json_decode
Live example: 3v4l
if you have a array then you can use the below code
if(!empty($array['test2'])){
$newarray = array();
foreach ($array['test2'] as $arrayRow) {
$newarray = array_merge($newarray,$arrayRow);
}
$array['test2'] = $newarray;
}
Let's say I have a data set in PHP that is in the form of:
$array = [{"prior":"0","id":"61039","type":"todo"},
{"prior":"1","id":"70341","type":"todo"},
{"prior":"3","id":"39104","type":"todo"},
{"prior":"4","id":"70315","type":"todo"},
{"prior":"6","id":"72050","type":"todo"},
{"prior":"7","id":"72329","type":"todo"},
{"prior":"8","id":"73992","type":"todo"}]
I want to process this array of arrays so that I have a single array with integer indexes and the values of only id.
It's trivial to simple use loops:
$data = array();
foreach($array as $item){
$data[] = $item['id'];
}
What I want to know, is there a way to do this, disregarding efficiency, using the built in array functions of PHP (with no loops), or am I stuck using the foreach loop?
You can use array_map() for this:
$data = array_map(function ($el) { return $el['id']; }, $array);
Note that this still has to perform the looping internally; it's just not shown explicitly as in a foreach loop. This approach will be far less efficient than a plain 'ol foreach.
Demo
With PHP >= 5.5.0:
$array = json_decode($array, true);
$ids = array_column($array, 'id');
this is the output of my array
[["1"],["1"],["1"],["1"],["1"],["1"],["1"],["1"],["1"],["1"],["1"],["1"],["1"],["1"]]
but I would like this to look like
[1,1,1,1,1,1,1]
how would this be achieved in php, it seems everything I do gets put into an object in the array, when I don't want that. I tried using array_values and it succeeded in returning the values only, since I did have keys originally, but this is still not the completely desired outcome
$yourArray = [["1"],["1"],["1"],["1"],["1"],["1"],["1"],["1"],["1"],["1"],["1"],["1"],["1"],["1"]];
use following code in PHP 5.3+
$newArray = array_map(function($v) {
return (int)$v[0];
}, $yourArray);
OR use following code in other PHP version
function covertArray($v) {
return (int)$v[0];
}
$newArray = array_map('covertArray', $yourArray)
You could always do a simple loop...
$newArray = array();
// Assuming $myArray contains your multidimensional array
foreach($myArray as $value)
{
$newArray[] = $value[0];
}
You could beef it up a little and avoid bad indexes by doing:
if( isset($value[0]) ) {
$newArray[] = $value[0];
}
Or just use one of the many array functions to get the value such as array_pop(), array_slice(), end(), etc.
I have an array that contains names of arrays
$names_array[] = ('$array1', '$array2', $array3'....)
The $names_array[] is dynamically updated so it may contain 2 or more different names.
When the script is executed the values of listed arrays in $names_array[] need to be merged.
I think in case of merging it is not a problem
u can merge $result = array_merge($array1, $array2);
http://php.net/manual/en/function.array-merge.php
I think it can be done with variable variables.
$arraymerge = array();
foreach ($names_array as $arrayname)
{
$arraymerge = array_merge($arraymerge, ${$arrayname});
}
Thanks for help... I have went around the problem: if anyone needs to merge dynamically generated arrays, in my case I have six arrays that exist or not, so I need to merge the existing ones. What I did is:
if(!is_array($array1[$i])) $array1[$i]=array();
if(!is_array($array2[$i])) $array2[$i]=array();
if(!is_array($array3[$i])) $array3[$i]=array();
if(!is_array($array4[$i])) $array4[$i]=array();
if(!is_array($array5[$i])) $array5[$i]=array();
if(!is_array($array6[$i])) $array5[$i]=array();
$combineddata[$i]=array_merge($array1[$i], $array2[$i],$array3[$i],$array4[$i], $array5[$i], $array6[$i]);
In case 'array_x[$i]' doesn't exists array_merge doesn't break the script just merges empty array.
Thanks
$names_array = array ('array1', 'array2', 'array3');
$array1 = array ('a','b','c');
$array2 = array ('d','e','f');
$array3 = array ('g','h','i');
$result = array ();
foreach ($names_array as $x) {
$result = array_merge ($result, $$x);
}
print_r ($result);
I have searched the PHP.net site and originally thought of some use for the list() function but doesn't seem to accomplish the goal:
I have an unknown number of values stored in a single array
$array1 = array(1,2,3,4,5);
or
$array1 = array(1,2,3);
I want to be able to echo (or print_r) the values contained within an array to screen and separated only by commas and spacing.
For example:
the 'idea' is to have echo $array1 to display:
1,2,3
from the second example above.
http://us.php.net/manual/en/function.implode.php
echo implode(", ", $array);
You can simply use PHP's implode function for this purpose as follows:
$string = implode(',', array(1,2,3,4,5));
You can make use of list() function if you know there are only 3 values.
$array = array('Life', 'living', 'Health');
list($life, $living, $health) = $array;
echo $life;
echo $living;
echo $health;
Note - you can make use of implode function as well.