I'm super new at php, I'm working on a game in Unity c# and I'm trying to send and receive data from a mysql server. I think I'm having a problem with syntax. I basically have a string that's being sent from my c# script that holds multiple ships with their stats. The ships are seperated by zzz which is a string of it's stats separated by space. I'd like to be able to set the stats array within the ships array. This is what I have but it's not working. Thanks!!
$shiparraytobesplit = $_POST["shipinventory"];
$ships = explode("zzz", $shiparraytobesplit);
for($i = 0; $i<count($ships)-1; $i++)
{
$tempship[$i] = $ships[$i];
$tempshipinfo = explode(" ", $tempship);
for($ii = 0; $ii<count($tempshipinfo[!i])-1; $ii++)
{
//$shipinfo[$tempship][] = $info . '_' . $tempshipinfo;
$shipinfo[$ii] = $tempshipinfo[$ii];
}
echo $shipinfo[1];
}
I've tried a few variations but I can't seem to get it to work with this example. I'm probably missing something simple since I'm a total noob to php and kind of new to programming. Thanks again
You have some extraneous subscripts that aren't needed.
If you have an extra element in the array, it's probably easier to just unset it, then you can loop over the entire array. array_map() is an easy way to produce a new array from an existing array.
$shiparraytobesplit = $_POST["shipinventory"];
$ships = explode("zzz", $shiparraytobesplit);
unset($ships[count($ships)-1]);
$shipinfo = array_map(function($ship) {
$tempshipinfo = explode(" ", $ship);
unset($tempshipinfo[count($tempshipinfo)-1]);
return $tempshipinfo;
}, $ships);
print_r($shipinfo);
If you want associative arrays, you can do that in the function.
$shiparraytobesplit = $_POST["shipinventory"];
$ships = explode("zzz", $shiparraytobesplit);
unset($ships[count($ships)-1]);
$shipinfo = array_map(function($ship) {
$tempshipinfo = explode(" ", $ship);
$ship_assoc = [
"id" => $tempshipinfo[0],
"name" => $tempshipinfo[1],
"username" => $tempshipinfo[2],
"hp" => $tempshipinfo[3]
];
return $ship_assoc;
}, $ships);
print_r($shipinfo);
Related
I'm trying to create an unknown number of arrays dynamically inside a foreach loop, merge them all at the end into one array, and use this in a JSON format for Google Analytics.
So far I have the following code which is throwing an error at the merge part:
$p=1;
foreach(...){
...
$arr = 'arr'.$p;
$name = $order->ProductGroupName;
$name = str_replace("'", "", $name);
$arr = array(
"name"=>$name,
"id"=>$order->ProductCode,
"price"=>$order->RRP,
"quantity"=>$order->Quantity
);
$p++;
}
for ($q = 1; $q<$p; $q++){
$arry = 'arr'.$q;
$merge = array_merge($arry, $merge);
};
How do I create the arrays dynamically and merge them at the end, please?
I'm relatively new to PHP and have tried my best to get this to work.
I think I understand what you're trying to do. Just dynamically append [] to the array and you don't need to merge:
foreach($something as $order) {
$arr[] = array (
"name"=>str_replace("'", "", $order->ProductGroupName),
"id"=>$order->ProductCode,
"price"=>$order->RRP,
"quantity"=>$order->Quantity
);
}
If you want to have string keys for whatever reason, then:
$p = 1;
foreach($something as $order) {
$arr["SomeText$p"] = array (
"name"=>str_replace("'", "", $order->ProductGroupName),
"id"=>$order->ProductCode,
"price"=>$order->RRP,
"quantity"=>$order->Quantity
);
$p++;
}
And that's it. Check with:
print_r($arr);
Things like $arry = 'arr'.$q; stink of variable variables (though not done correctly) and shouldn't be used.
I receive a JSON stream from an iphone that contains some simple strings and numbers as well as an array of dictionaries. I would like to work with these dictionaries, in essence, storing the data in each of them in a separate MYSQL record.
To get access to the strings as well as the array from the JSON stream, I am using the following:
$jsonString = file_get_contents('php://input');
$jsonArray = json_decode($jsonString, true);
$authString = jsonArray['authstring'];
$itemsArray = $jsonArray['itemsArray'];
This is what itemsArray looks like before being sent to the server:
itemsArray = (
{
lasttouchedstr = "2018-07-09 17:24:56";
localiid = 6;
iid = 0;
title = "test";
complete = 1;
userid = 99;
whenaddedstr = "2018-06-21 14:10:23";
},
{
lasttouchedstr = "2018-07-09 17:24:56";
localiid = 37;
iid = 0;
title = "how about this";
userid = 88;
whenaddedstr = "2018-07-07 16:58:31";
},
{
lasttouchedstr = "2018-07-09 17:24:56";
localiid = 38;
iid = 0;
title = reggiano;
userid = 1;
whenaddedstr = "2018-07-07 17:28:55";
}
etc.
I guess I should probably put these dictionaries into an Associative Array in order to save them.
I am struggling, however, with how to reference and get the objects. From what I can tell the following code is returning empty values in so far as $message comes back as empty.
$anitem = $jsonArray['itemsArray'][0];
$message=$anitem;
$title = $jsonArray['itemsArray'][0].[item];
$message.=$title;
Can anyone suggest proper syntax to grab these items and their properties?
Thanks in advance for any suggestions.
I find it strange that people associate things with a dictionary, while it is nothing more then a multidimensional array.
If you can read JSON, you see that the variable will have an index containing each entry.
For PHP:
foreach($jsonArray as $array){
// note that $array is still an array:
foreach($array as $v){
echo "Hurray!: '$v'";
}
}
If it really was an object (or cast to an object), the only thing you need to change is how you access the variable (as in any other language). In PHP it would be:
echo $jsonArray[0]->lasttouchedstr;
Or of it was the same loop:
foreach($jsonArray as $v){
echo $v->lasttouchedstr;
}
Multidimensional?
echo $jsonArray['itemsArray'][0][item]; // array
echo $jsonArray->itemsArray[0][item]; // if items array is an actual array and jsonArray an object.
Most languages associate things written as a . that the left side is an object. In PHP it's written as ->.
I know this is a simple concept (albeit one I struggle with) but I have some latitude and longitude data. It is read from a .data file (not as a .db, not my choice) and here is what I have so far:
$current_data = file("/my_data_file.data");
$latest_data = array();
foreach ($current_data as $entry)
{
$latest_data[] = $entry;
}
$latest_data = preg_replace("!\r?\n!", "", $latest_data);
echo json_encode($latest_data);
This outputs the data like so (didn't paste all of it here to save your eyes from bleeding):
["-118.510 33.896 ","-120.762 32.826 ","-122.959 31.716 ","-125.104 30.570 ","-127.198 29.389 ","-129.243 28.175 ","-131.243 26.931 ","-133.198 25.660 ","-135.112 24.362 ","-136.988 23.041 "]
So it's one giant array, each lat/long pair separated by a comma and each pair within quotations.
I've googled this and there is a ton of information on php arrays and key/values, but what's the right way to do it? I find myself making this much more complicated than it needs to be.
Assuming in the foreach loop it'll be something like
$latest_data[] = array('latitude' => $entry[the_lat_number], 'longitude' => $entry[the_long_number]);
Any input on the matter is appreciated.
Update: example of the data viewed in VIM (It doesn't visually appear there IS a whitespacing issue, but based on using explode, there does seem to be).
$current_data = file("/my_data_file.data");
$latest_data = array();
foreach ($current_data as $entry)
{
list($lat,$lng) = explode(" ",$entry);
$latest_data[] = array('lat' => $lat, 'lng' => $lng);
}
Now your json data should look something like this:
[{lat: xx, lng: xx},...]
Using your code to add each pair as subarray is good approach. This way you'll be able to easily access data from each row like that $latest_data[3]['latitude'] (to get latitude from fourth row).
Ok I ended up using preg_split instead of explode and all seems ok:
$current_data = file("/tmp/navhome/data/path_tail.data");
$latest_data = array();
foreach ($current_data as $entry) {
$coords = preg_split("/ +/", $entry);
$latest_data[] = array('latitude' => $coords[0], 'longitude' => $coords[1]);
}
echo json_encode($latest_data);
This is airplane data that gets updated when the flight path changes so it seemed preg_split was more appropriate.
This is outputting the data like so:
[{"latitude":"-118.510","longitude":"33.896"},{"latitude":"-120.762","longitude":"32.826"},{"latitude":"-122.959","longitude":"31.716"}]
Appreciate the input from everyone. Criticisms are welcome on this solution.
If i knew the correct terms to search these would be easy to google this but im not sure on the terminology.
I have an API that returns a big object. There is one particular one i access via:
$bug->fields->customfield_10205[0]->name;
//result is johndoe#gmail.com
There is numerous values and i can access them by changing it from 0 to 1 and so on
But i want to loop through the array (maybe thats not the correct term) and get all the emails in there and add it to a string like this:
implode(',', $array);
//This is private code so not worried too much about escaping
Would have thought i just do something like:
echo implode(',', $bug->fields->customfield_10205->name);
Also tried
echo implode(',', $bug->fields->customfield_10205);
And
echo implode(',', $bug->fields->customfield_10205[]->name);
The output im looking for is:
'johndoe#gmail.com,marydoe#gmail.com,patdoe#gmail.com'
Where am i going wrong and i apologize in advance for the silly question, this is probably so newbie
You need an iteration, such as
# an array to store all the name attribute
$names = array();
foreach ($bug->fields->customfield_10205 as $idx=>$obj)
{
$names[] = $obj->name;
}
# then format it to whatever format your like
$str_names = implode(',', $names);
PS: You should look for attribute email instead of name, however, I just follow your code
use this code ,and loop through the array.
$arr = array();
for($i = 0; $i < count($bug->fields->customfield_10205); $i++)
{
$arr[] = $bug->fields->customfield_10205[$i]->name;
}
$arr = implode(','$arr);
This is not possible in PHP without using an additional loop and a temporary list:
$names = array();
foreach($bug->fields->customfield_10205 as $v)
{
$names[] = $v->name;
}
implode(',', $names);
You can use array_map function like this
function map($item)
{
return $item->fields->customfield_10205[0]->name;
}
implode(',', array_map("map", $bugs)); // the $bugs is the original array
I have a PHP array that I'd like to duplicate but only copy elements from the array whose keys appear in another array.
Here are my arrays:
$data[123] = 'aaa';
$data[423] = 'bbb';
$data[543] = 'ccc';
$data[231] = 'ddd';
$data[642] = 'eee';
$data[643] = 'fff';
$data[712] = 'ggg';
$data[777] = 'hhh';
$keys_to_copy[] = '123';
$keys_to_copy[] = '231';
$keys_to_copy[] = '643';
$keys_to_copy[] = '712';
$keys_to_copy[] = '777';
$copied_data[123] = 'aaa';
$copied_data[231] = 'ddd';
$copied_data[643] = 'fff';
$copied_data[712] = 'ggg';
$copied_data[777] = 'hhh';
I could just loop through the data array like this:
foreach ($data as $key => $value) {
if ( in_array($key, $keys_to_copy)) {
$copied_data[$key] = $value;
}
}
But this will be happening inside a loop which is retrieving data from a MySQL result set. So it would be a loop nested within a MySQL data loop.
I normally try and avoid nested loops unless there's no way of using PHP's built-in array functions to get the result I'm looking for.
But I'm also weary of having a nested loop within a MySQL data loop, I don't want to keep MySQL hanging around.
I'm probably worrying about nested loop performance unnecessarily as I'll never be doing this for more than a couple of hundred rows of data and maybe 10 keys.
But I'd like to know if there's a way of doing this with built-in PHP functions.
I had a look at array_intesect_key() but that doesn't quite do it, because my $keys_to_copy array has my desired keys as array values rather than keys.
Anyone got any ideas?
Cheers, B
I worked it out - I almost had it above.I thought I'd post the answer anyway for completeness. Hope this helps someone out!
array_intersect_key($data, array_flip($keys_to_copy))
Use array_flip() to switch $keys_to_copy so it can be used within array_intersect_keys()
I'll run some tests to compare performance between the manual loop above, to this answer. I would expect the built-in functions to be faster but they might be pretty equal. I know arrays are heavily optimised so I'm sure it will be close.
EDIT:
I have run some benchmarks using PHP CLI to compare the foreach() code in my question with the code in my answer above. The results are quite astounding.
Here's the code I used to benchmark, which I think is valid:
<?php
ini_set('max_execution_time', 0);//NOT NEEDED FOR CLI
// BUILD RANDOM DATA ARRAY
$data = array();
while ( count($data) <= 200000) {
$data[rand(0, 500000)] = rand(0, 500000);
}
$keys_to_copy = array_rand($data, 100000);
// FOREACH
$timer_start = microtime(TRUE);
foreach ($data as $key => $value) {
if ( in_array($key, $keys_to_copy)) {
$copied_data[$key] = $value;
}
}
echo 'foreach: '.(microtime(TRUE) - $timer_start)."s\r\n";
// BUILT-IN ARRAY FUNCTIONS
$timer_start = microtime(TRUE);
$copied_data = array_intersect_key($data, array_flip($keys_to_copy));
echo 'built-in: '.(microtime(TRUE) - $timer_start)."s\r\n";
?>
And the results...
foreach: 662.217s
array_intersect_key: 0.099s
So it's much faster over loads of array elements to use the PHP array functions rather than foreach. I thought it would be faster but not by that much!
Why not load the entire result set into an array, then begin processing with nested loops?
$query_result = mysql_query($my_query) or die(mysql_error());
$query_rows = mysql_num_rows($query_result);
for ($i = 0; $i < $query_rows; $i++)
{
$row = mysql_fetch_assoc($query_result);
// 'key' is the name of the column containing the data key (123)
// 'value' is the name of the column containing the value (aaa)
$data[$row['key']] = $row['value'];
}
foreach ($data as $key => $value)
{
if ( in_array($key, $keys_to_copy))
{
$copied_data[$key] = $value;
}
}