I have a function using array_search not working ... here is my code
function LangFull($name){
$languageCodes = array(
"abkhazian"=>"ab",
"afar"=>"aa",
"afrikaans"=>"af",
"afrikaans"=>"af-za",
"zulu"=>"zu",
"zulu"=>"zu-za"
);
return ucwords(array_search(strtolower($name),$languageCodes));
}
echo LangFull("zu"); /// Gives no output
echo LangFull("zu-za"); /// Gives output
same with af is no output ... please help
If its possible to interchange, (values to keys and keys to values) and won't have those key collisions, then you can do it that way also:
function LangFull($name){
$languageCodes = array(
"ab" => "abkhazian",
"aa" => "afar",
"af" => "afrikaans",
"af-za" => "afrikaans",
"zu" => "zulu",
"zu-za" => "zulu",
);
return isset($languageCodes[$name]) ? ucwords(strtolower($languageCodes[$name])) : 'Not found';
}
echo LangFull("zu"); /// Gives output
echo LangFull("zu-za"); /// Gives output
echo LangFull("yahoo!");
You have two identical array keys:
"zulu"=>"zu",
"zulu"=>"zu-za"
You need to name one of them something else.
As they are the same, trying to access one of them specifically is futile as PHP does not know which of the two you are requesting.
Alternatively, if you are trying to store more than 1 data value for a given key, you can make the value of a key an array, so can then store more data as required.
e.g.
array (
"afrikaans"=> array(
"af",
"af-za",
),
"zulu"=> array(
"zu",
"zu-za",
)
);
EDIT.
In response to you asking about swapping the keys and values:
You can, and Ghost has shown you how.
However retaining your keys as they are (as my above array example) allows you to collate all relevant data into one index, and can access it easily.
Swapping values and keys will likely make it harder to obtain data you need, as your key is now the "data". So to grab data from an array you'd need to know the data (as it's now the key) and you'd actually be grabbing the reference (what was your key).
Which is a bit odd. It can work, but it's not really ideal.
Related
My data looks like:
countyFIPS,County Name,State,stateFIPS,1/22/20,1/23/20,1/24/20,1/25/20,....
1001,Autauga County,AL,1,0,0,0,0,0,0,0,0,....
...
I've been able to retrieve it using an Ajax call and collect it into a simple PHP array, then convert it to json to use in my javascript application. While it appears that the data is all counties of a state, followed by the same configuration for the next state, there is no guarantee that it won't be mixed up in some later set of data.
I'm an old Fortran programmer, and would tend to build a hash table for the "states", then check if the state exists in the hash table. If not create a new hash table and add this empty hash table as the value for the key with the name of the state to the "state" hash table. Then check the state hash table to see if it has a key for the county. Again, if it doesn't, then add an empty array as the value for the key with the county name and add that to the state hash table, then proceed to put the values for that row into the county array. I know this will work, but thought maybe there was some clever way to use associative arrays in PHP to accomplish the same thing.
I look at array_filter, but can't seem to figure out how to adapt it to this case. Are there other functions that might work here?
Then, once I have this structure of
$nested_object = { state1=>{county1,county2,county3...},state2=>{counties}},
and those counties have:
county=>[values],
how can I easily convert this to a json structure? Should it have other keys like "states", and within a state "counties". From looking at Haroldo's question "Convert a PHP object to an associative array" of Dec 3, 2010, it appears like I would use:
$array = json_decode(json_encode($nested_object), true);
Will this give me the structure I am looking for?
I want to end up with a structure that I can ask for the states as a set of keys, then for a selected state ask for the counties in that state as a set of keys, and upon selecting one, get the array of values for that state/county. This has to run on a server with potentially a large amount of data and a moderate amount of hits per unit time so I wanted as reasonably efficient way as possible.
I want to end up with a structure that I can ask for the states as a set of keys, then for a selected state ask for the counties in that state as a set of keys, and upon selecting one, get the array of values for that state/county
Okay, so you need something like:
$structure = [
'AL' => [
'counties' => [
'FIPS1' => 'County1',
'FIPS2' => 'County2',
],
'data' => [
'FIPS1' => [
[ 'date1' => value1, 'date2' => value2, 'date3' => value3... ]
],
],
],
'AK' => [ ... ]
];
You can do that using array_map() and a lambda function writing to $structure, but... in my experience, it is not worth it.
Best to do like you said:
while ($row = get_another_row()) {
$countyFIPS = array_unshift($row);
$countyName = array_unshift($row);
$stateName = array_unshift($row);
$stateFIPS = array_unshift($row);
if (!array_key_exists($stateName, $structure)) {
$structure[$stateName] = [
'counties' => [ ],
'data' => [ ],
];
}
if (!array_key_exists($countyFIPS, $structure[$stateName]['counties'])) {
$structure[$stateName]['counties'][$countyFIPS] = $countyName;
$structure[$stateName]['data'][$countyFIPS] = [ ];
}
// Now here you will have $headers, obtained from the header row unshifting
// the first four fields.
foreach ($headers as $i => $key) {
$structure[$stateName]['data'][$countyFIPS][$key] = $row[$i];
}
}
This way if you add two CSVs with different dates, the code will still work properly. Dates will not be sorted though, but you can do that with a nested array_map and the aksort function.
To output this in JSON, just use json_encode on $structure.
Ive come upon the following code and having trouble deciphering its use.
(changed up the variable names a bit for simplicity)
$fooo = array(
'dog' => array('pages', 'home'),
'cat' => array('users', 'login'),
'bird' => array('users', 'reset', 1),
);
I am familiar with associative arrays but have not seen this "nested array" implementation before.
Is this code creating an array of arrays?
For example, $fooo['dog'] returns an array where $dog[0]='pages' and $dog[1]='home'
That seems wrong.
Yes, this is an array of arrays. But it perhaps may be more accurate to describe it as an associative array with an indexed array for every value.
The following can be done with it:
$fooo['dog'] // gets array("pages", "home")
$fooo['bird'][0] // gets "users"
$fooo['cat'][1] // gets "login"
$fooo['cow'] = array('x', 'y'); // adds another value to the outer array
$fooo['bird'][] = 2; // $fooo['bird'] now equals array('users', 'reset', 1, 2)
There is nothing wrong with this code, but your example is lacking practicality. There is plenty of code that uses such structures though. For example, a logical representation of a menu with sub-menus on a website (which seems like the source of your sample), this data structure can then be looped to generate an HTML/CSS menu.
I have a simple question:
Query returns array in which I would like to change order of elements in PHP.
I have an array like this:
$typesSumAr = array( 'break', 'private absence', 'sick leave', 'vacation', 'work', 'work absence' );
I would like to have an array in this order:
$typesSumAr = array( 'work', 'break', 'sick leave', 'vacation', 'private absence', 'work absence' );
The are not always all elements in array, it could be only two for example, so I cannot hardcode the array. Do I need to make if statemenets to find out if key exists and then order it manually?
Thank you for your answer.
Seeing as you have an array in the order you prefer, your problem boils down to keeping the elements that are also present in another array. PHP has a function for exactly that: array_intersect
array_intersect returns an array containing all the values of its first array argument that are present in all the arguments. Note that keys are preserved.
There are lots of great array sorting function depending on how you want to sort it. Have a look here http://www.php.net/manual/en/array.sorting.php or even based on your own function via uksort (http://www.php.net/manual/en/function.uksort.php)
I search a lot in stack and google try to find the answer which seems to be easy but I'm still stuck with it
I write a code to encode json with values I wanted from . and I would like to add a key / value to the JSON
the JSON is as following structure
{
- files: [
{
title: "works",
- tracks: [
{
title: "File",
format: "mp3"
}
]
},
-{
title: "season1",
tracks: [
{
title: "Button-1",
format: "wav"
},
-{
title: "Beep-9",
format: "wav"
}
]
}
]
}
I want to add to that a key and its value at the beginning to the json as properties under the title files , I mean that can be read by code as
json[files][new_key]
I tried to set that value like this
$json['new_key'] = "new_value";
but this causes adding numbers to the arrays in json , I don't why they numbered
this numbers affect my reading way of the json as JSONModel in my iOS app
so , I hope you can help me
thanks in advance
Assuming that the new value you want to add varies by file, you would need to loop through $json[files] and insert them per key/value pair.
<?php
for($i=0; $i<count($json); $i++)
$json[files][$i]["new_key"] = "value";
?>
I'm still not sure what you have exactly, but it seems you are trying to manipulate the json string.
If done correctly, that is probably the most efficient solution, but what you could also do is:
use json_decode to generate an array from your json string;
locate the correct section / sub-array where you want to add your data;
use array_unshift to prepend your new key - value pair;
use json_encode to generate a json string from your complete array.
The reason you're getting numbers appearing is because you're adding a key to an array (which functions more or less as a list in JS). So before you basically have the object "files" as a list of objects zero-indexed like any other JS array. When you add the key, JS simply adds your key to the end of your present keys (in your case 0 and 1).
It seems like you have a list of multimedia objects where each has a title and a list of tracks. The most straightforward way to solve your issue would be as follows:
$fileItem['title'] = 'works';
$fileItem['tracks'] = array(
array(
'title' => 'File',
'format' => 'mp3'
)
);
$json['files'][] = $fileItem;
$fileItem['title'] = 'season1';
$fileItem['tracks'] = array(
array(
'title' => 'Button-1',
'format' => 'wav'
),
array(
'title' => 'Beep-9',
'format' => 'wav'
)
);
$json['files'][] = $fileItem;
Then you JSON encode it and return it as you normally would. You can put the above in a loop as well. I lack enough context to recommend exactly how.
Is it possible in php to make an array an array key as well?
Example:
array(
array('sample', 'abc') => 'sample value'
);
No, if you read the manual
An array in PHP is actually an ordered map. A map is a type that associates values to keys. This type is optimized for several different uses; it can be treated as an array, list (vector), hash table (an implementation of a map), dictionary, collection, stack, queue, and probably more. As array values can be other arrays, trees and multidimensional arrays are also possible.
And :
The key can either be an integer or a string. The value can be of any type.
This is not possible - array keys must be strings or integers.
What you could do is use serialize:
$myArr = array( serialize(array('sample', 'abc')) => 'sample value');
Which will be the same as:
$myArr = array( 'a:2:{i:0;s:6:"sample";i:1;s:3:"abc";}' => 'sample value');
and could be accessed like:
echo $myArr[serialize(array('sample', 'abc'))];
But note that the serialised string which would be the unique identifier for the array item is clearly fairly complicated and almost impossible to type by hand.
PHP arrays can contain integer and string keys while since PHP does not distinguish between indexed and associative arrays.
Look for php manual Php Manual
whats wrong with
array(
'sample value' => array('sample', 'abc')
);
you could then do
foreach($array as $string => $child){
...
}
and use the $child for whatever purpose