I have a list of array keys in form of a string
"hasAddStrict,freqItems,freqAmount,freqUnit,freqFirstDayOfWeek"
Now, want to extract only those values, i.e $myarray['hasAddstrict'] should become $hasAddStrict, etc.
Is there a short way to do it? My rather dirty solution:
$ff = explode(',' ,"hasAddStrict,freqItems,freqAmount,freqUnit,freqFirstDayOfWeek");
foreach ( $ff as $key){ $ff[$key] = $SERVICE[$key] ; }
extract($ff);
I agree with Jeff that there isn't really a better way, and that keeping the variables as an array is probably a better idea, but you could wrap it up in a function for convenience (tested in php 5.6):
<?php
function array_extract(array $assoc_array, $keys_list)
{
return array_intersect_key($assoc_array, array_flip(explode(',', $keys_list)));
}
extract(array_extract($SERVICE, "hasAddStrict,freqItems,freqAmount,freqUnit,freqFirstDayOfWeek"));
When tested as follows:
$SERVICE = [
'hasAddStrict' => 123,
'freqItems' => 456,
'freqAmount' => 789,
'freqUnit' => 'abc',
'freqFirstDayOfWeek' => 'def',
];
extract(array_extract($SERVICE, "hasAddStrict,freqItems,freqAmount,freqUnit,freqFirstDayOfWeek"));
var_dump($hasAddStrict, $freqItems, $freqAmount, $freqUnit, $freqFirstDayOfWeek);
You get output:
int(123)
int(456)
int(789)
string(3) "abc"
string(3) "def"
Related
I have multidimensional array like this:
$obj = array(
"a" => array(
"aa" => array(
"aaa" => 1
),
"bb" => 2,
),
"b" => array(
"ba" => 3,
"bb" => 4,
),
"c" => array(
"ca" => 5,
"cb" => 6,
),
);
I can not figured out a neatest way, e.g. custom-depth function, to extract item at specific location with arguments to function (or array of key names). For example:
echo $obj[someFunc("a", "aa", "aaa")];
... should return 1.
print_r($obj[someFunc("a")]);
... should return:
Array
(
[aa] => Array
(
[aaa] => 1
)
[bb] => 2
)
What is the best way to accomplished this with php7 features?
Since PHP 5.6, ["Variadic functions"][1] have existed. These provide us with a nice simple to read way to collect arguments used in calling a function into a single array. For example:
function getValue(...$parts) {
var_dump($parts);
}
getValue('test', 'part');
Will output:
array(2) {
[0]=>
string(4) "test"
[1]=>
string(4) "part"
}
This was all possible before using built-in functions to get the parameters, but this is more readable.
You could also be a little more explicit with the argument types, but I'll leave that for you to figure out if necessary.
You next major challenge is to loop through the arguments. Something like this will produce the value that you desire.
function getValue(...$parts) {
$returnValue = $obj;
foreach ($parts as $part) {
$returnValue = $obj[$part];
}
return $returnValue;
}
However, this is rather crude code and will error when you try calling it to access non-existent parts. Have a play and fix those bits.
[1]: https://www.php.net/manual/en/functions.arguments.php#functions.variable-arg-list
I have a some messy data coming in from a feed, and am trying to figure out how to sort it correctly. I posted a simplified example below. I'd like to sort the people array alphabetically by the Group name.
$people = array(
"category_id_1" => array (
"Mark",
"Jenny",
"Andrew"
),
"category_id_2" => array (
"John",
"Lewis",
"Andrea"
),
"category_id_3" => array (
"Hannah",
"Angie",
"Raleigh"
)
);
$categories = array(
"category_id_1" => "Group B",
"category_id_2" => "Group C",
"category_id_3" => "Group A"
);
Ideally, the end result would be
$people = array(
"category_id_3" => array ( // Group A
"Hannah",
"Angie",
"Raleigh"
),
"category_id_1" => array ( // Group B
"Mark",
"Jenny",
"Andrew"
),
"category_id_2" => array ( // Group C
"John",
"Lewis",
"Andrea"
)
);
I've been spinning my wheels for a while now, and the closest I have gotten is this uasort, which still isn't doing the trick.
uasort($people, function ($a, $b) {
return strcmp($categories[$a], $categories[$b]);
});
Thanks so much for any help.
This can be achieved in a simpler way by taking advantage of array_replace:
// Work on a copy just to be sure the rest of your code is not affected
$temp_categories = $categories;
// Sort categories by name
asort($temp_categories);
// Replace the values of the sorted array with the ones in $people
$ordered_people = array_replace($temp_categories, $people);
You want to sort $people by its keys not its values. You can use uksort for this. Additionally you need to make $categories available in your function. I prefer use for that; but you could also make it a global variable. Final code:
uksort($people, function ($a,$b) use ($categories) {
return strcmp($categories[$a], $categories[$b]);
});
Manual for uksort
use language construct. Before example 3.
I think what you need is to Asort categories and the use that sorted array in a foreach.
Asort($categories);
Foreach($categories as $key => $group){
$new[$key] =$people[$key];
}
Var_dump($new);
https://3v4l.org/kDAQW
Output:
array(3) {
["category_id_3"]=> array(3) {
[0]=> "Hannah"
[1]=> "Angie"
[2]=> "Raleigh"
}
["category_id_1"]=> array(3) {
[0]=> "Mark"
[1]=> "Jenny"
[2]=> "Andrew"
}
["category_id_2"]=>array(3) {
[0]=> "John"
[1]=> "Lewis"
[2]=> "Andrea"
}
}
Try this(tested and working):
asort($categories);
$sorted = array();
foreach ($categories as $key => $value)
$sorted[$key]=$people[$key];
A better shorter approach:(tested and working)
asort($categories);
$result = array_merge($categories,$people);
The second method takes advantage of the fact that array_merge function replace the values in the first array with those in the second one when keys are the same.
warning : The second approach will not work if the keys are numbers. Use only string keys with it. Furthermore if the categories array has entries without corresponding entries in the people array they will be copied to the result
To solve this problem we use array_replace :
asort($categories);
$result = array_replace($categories,$people);
Var_dump($result);// tested and working
I have a relatively large array of elements which I want to search for a string and replace any matches. I'm currently trying to do this using preg_replace and regular expressions:
preg_replace("/\d?\dIPT\.\w/", "IPT", $array);
I want to get all values which match either 00IPT.A or 0IPT.A (with 0 representing any numerical character and A representing any letter) and replace them with IPT. However, I'm getting array to string conversion notices. Is there any way to get preg_replace to accept an array data source? If not, is there any other way I could achieve this?
The documentation says that preg_replace should be able to accept array sources — this is the reason I'm asking.
The string or an array with strings to search and replace.
If subject is an array, then the search and replace is performed on every entry of subject, and the return value is an array as well.
The array is multidimensional if that helps (has multiple arrays under one main array).
preg_replace doesn't modify in place. To permanently modify $array, you simply need to assign the result of preg_replace to it:
$array = preg_replace("/\d{1,2}IPT\.\w/", "IPT", $array);
works for me.
$array = array('00IPT.A', '0IPT.A');
$array = preg_replace("/\d{1,2}IPT\.\w/", "IPT", $array);
var_dump($array);
// output: array(2) { [0]=> string(3) "IPT" [1]=> string(3) "IPT" }
Note: the \d{1,2} means one or two digits.
If you want to do this to a two-dimensional array, you need to loop through the first dimension:
$array = array( array('00IPT.A', 'notmatch'), array('neither', '0IPT.A') );
foreach ($array as &$row) {
$row = preg_replace("/\d{1,2}IPT\.\w/", "IPT", $row);
}
var_dump($array);
output:
array(2) {
[0]=> array(2) {
[0]=> string(3) "IPT"
[1]=> string(8) "notmatch"
}
[1]=> &array(2) {
[0]=> string(7) "neither"
[1]=> string(3) "IPT"
}
}
Note that you have to loop through each row by reference (&$row) otherwise the original array will not be modified.
Your value does not sit in the array as a simple element but as a subset right? Like so?
array (
array ('id' => 45, 'name' => 'peter', 'whatyouarelookingfor' => '5F'),
array ('id' => 87, 'name' => 'susan', 'whatyouarelookingfor' => '8C'),
array ('id' => 92, 'name' => 'frank', 'whatyouarelookingfor' => '9R')
)
if so:
<?php
foreach ($array as $key => $value) {
$array[$key]['whatyouarelookingfor'] =
preg_replace("/\d?\dIPT\.\w/", "IPT", $value['whatyouarelookingfor']);
}
Or if more elements have this, just go broader:
<?php
foreach ($array as $key => $value) {
$array[$key] =
preg_replace("/\d?\dIPT\.\w/", "IPT", $value);
}
your $array contains some further arrays. preg_replace works fine with arrays of strings, but not with arrays of arrays [of arrays...] of strings.
I have an PHP array that looks something like this:
Index Key Value
[0] 1 Awaiting for Confirmation
[1] 2 Assigned
[2] 3 In Progress
[3] 4 Completed
[4] 5 Mark As Spam
When I var_dump the array values i get this:
array(5) { [0]=> array(2) { ["key"]=> string(1) "1" ["value"]=> string(25) "Awaiting for Confirmation" } [1]=> array(2) { ["key"]=> string(1) "2" ["value"]=> string(9) "Assigned" } [2]=> array(2) { ["key"]=> string(1) "3" ["value"]=> string(11) "In Progress" } [3]=> array(2) { ["key"]=> string(1) "4" ["value"]=> string(9) "Completed" } [4]=> array(2) { ["key"]=> string(1) "5" ["value"]=> string(12) "Mark As Spam" } }
I wanted to remove Completed and Mark As Spam. I know I can unset[$array[3],$array[4]), but the problem is that sometimes the index number can be different.
Is there a way to remove them by matching the value name instead of the key value?
Your array is quite strange : why not just use the key as index, and the value as... the value ?
Wouldn't it be a lot easier if your array was declared like this :
$array = array(
1 => 'Awaiting for Confirmation',
2 => 'Asssigned',
3 => 'In Progress',
4 => 'Completed',
5 => 'Mark As Spam',
);
That would allow you to use your values of key as indexes to access the array...
And you'd be able to use functions to search on the values, such as array_search() :
$indexCompleted = array_search('Completed', $array);
unset($array[$indexCompleted]);
$indexSpam = array_search('Mark As Spam', $array);
unset($array[$indexSpam]);
var_dump($array);
Easier than with your array, no ?
Instead, with your array that looks like this :
$array = array(
array('key' => 1, 'value' => 'Awaiting for Confirmation'),
array('key' => 2, 'value' => 'Asssigned'),
array('key' => 3, 'value' => 'In Progress'),
array('key' => 4, 'value' => 'Completed'),
array('key' => 5, 'value' => 'Mark As Spam'),
);
You'll have to loop over all items, to analyse the value, and unset the right items :
foreach ($array as $index => $data) {
if ($data['value'] == 'Completed' || $data['value'] == 'Mark As Spam') {
unset($array[$index]);
}
}
var_dump($array);
Even if do-able, it's not that simple... and I insist : can you not change the format of your array, to work with a simpler key/value system ?
...
$array = array(
1 => 'Awaiting for Confirmation',
2 => 'Asssigned',
3 => 'In Progress',
4 => 'Completed',
5 => 'Mark As Spam',
);
return array_values($array);
...
$key = array_search("Mark As Spam", $array);
unset($array[$key]);
For 2D arrays...
$remove = array("Mark As Spam", "Completed");
foreach($arrays as $array){
foreach($array as $key => $value){
if(in_array($value, $remove)) unset($array[$key]);
}
}
You can use this
unset($dataArray['key']);
Why do not use array_diff?
$array = array(
1 => 'Awaiting for Confirmation',
2 => 'Asssigned',
3 => 'In Progress',
4 => 'Completed',
5 => 'Mark As Spam',
);
$to_delete = array('Completed', 'Mark As Spam');
$array = array_diff($array, $to_delete);
Just note that your array would be reindexed.
Try this:
$keys = array_keys($array, "Completed");
/edit
As mentioned by JohnP, this method only works for non-nested arrays.
I kinda disagree with the accepted answer. Sometimes an application architecture doesn't want you to mess with the array id, or makes it inconvenient. For instance, I use CakePHP quite a lot, and a database query returns the primary key as a value in each record, very similar to the above.
Assuming the array is not stupidly large, I would use array_filter. This will create a copy of the array, minus the records you want to remove, which you can assign back to the original array variable.
Although this may seem inefficient it's actually very much in vogue these days to have variables be immutable, and the fact that most php array functions return a new array rather than futzing with the original implies that PHP kinda wants you to do this too. And the more you work with arrays, and realize how difficult and annoying the unset() function is, this approach makes a lot of sense.
Anyway:
$my_array = array_filter($my_array,
function($el) {
return $el["value"]!="Completed" && $el!["value"]!="Marked as Spam";
});
You can use whatever inclusion logic (eg. your id field) in the embedded function that you want.
The way to do this to take your nested target array and copy it in single step to a non-nested array.
Delete the key(s) and then assign the final trimmed array to the nested node of the earlier array.
Here is a code to make it simple:
$temp_array = $list['resultset'][0];
unset($temp_array['badkey1']);
unset($temp_array['badkey2']);
$list['resultset'][0] = $temp_array;
for single array Item use reset($item)
I am aware that I can use array_unique(array_merge($a,$b));
to merge two arrays and then remove any duplicates,
but,
is there an individual function that will do this for me?
(I know I could write one myself that just calls these, but I am just wondering).
There is no such function. Programming languages in general give you a certain set of tools (functions) and you can then combine them to get the results you want.
There really is no point in creating a new function for every use case there is, unless it is a very common use case - and yours does not seem to be one.
No, array_unique(array_merge($a,$b)); is the way to do it.
See the list of array functions.
By default no there isn't. You can do it another way (which might not be that smart though)
$array1 = array('abc', 'def');
$array2 = array('zxd', 'asdf');
$newarray = array_unique(array($array1, $array2));
does sort of the same thing. Just wondering why isn't what you posted good enough?
//usage $arr1=array(0=>"value0", 1=>"value1", 2=>"value2"); $arr2=array(0=>"value3", 1=>"value4", 2=>"value0") => $result=mergeArrays($arr1,$arr2); $result=Array ( [0] => value0 [1] => value1 [2] => value2 [3] => value3 [4] => value4 )
function mergeArrays () {
$result=array();
$params=func_get_args();
if ($params) foreach ($params as $param) {
foreach ($param as $v) $result[]=$v;
}
$result=array_unique($result);
return $result;
}
In php 5.6+ you can also use the new argument unpacking to avoid multiple array_merge calls (which significantly speed up your code): https://3v4l.org/arFvf
<?php
$array = [
[1 => 'french', 2 => 'dutch'],
[1 => 'french', 3 => 'english'],
[1 => 'dutch'],
[4 => 'swedish'],
];
var_dump(array_unique(array_merge(...$array)));
Outputs:
array(4) {
[0]=>
string(6) "french"
[1]=>
string(5) "dutch"
[3]=>
string(7) "english"
[5]=>
string(7) "swedish"
}