Looking at the code above...
$Array = array(array("name"=>"Mickey","type"=>"mouse"),array("name"=>"Donald","type"=>"duck"),array("name"=>"Little Helper","type"=>"eniac"));
$search = "Donald";
foreach($Array as $Item){
if($Item["name"]==$search) $MyItem = $Item;
}
echo('The item named "'.$search.'" is '.$MyItem["type"]);
... I have the feeling that there is an array function or a better way to find an item inside a bidimensional array. These arrays are like a table. Maybe setting the keys as the index unique values (in this case, the name), but I don't know how to do either.
Using the new array_column() function in PHP 5.5
$Array = array(array("name"=>"Mickey","type"=>"mouse"),array("name"=>"Donald","type"=>"duck"),array("name"=>"Little Helper","type"=>"eniac"));
$search = "Donald";
$key = array_search(
$search,
array_column($Array,'name')
);
if($key !== false) {
$MyItem = $Array[$key];
echo('The item named "'.$search.'" is '.$MyItem["type"]);
}
If you can recompose the array as:
array("Mickey"=>"mouse","Donald"=>"duck","Little Helper"=>"eniac");
or
array("Mickey"=>array("name"=>"mouse"),"Donald"=>array("name"=>"duck"),"Little Helper"=>array("name"=>"eniac"));
and just return by key
Works for this case:
echo array_column($Array, 'type', 'name')[$search];
Or with check:
$names = array_column($Array, 'type', 'name');
echo isset($names[$search]) ? $names[$search] : 'not found';
To convert to name => type use:
$Array = array_column($Array, 'type', 'name');
Then after you can just use $Array[$search].
Related
Here is my code
$temp = $this->whereBetween('id', [$sid,$eid])
->select('id','temperature')
->get();
will return
[{"id":1,"temperature":34.5},{"id":2,"temperature":32.56},
how do i get only result like this, remove the key and pass the value only.
[{1,34.5},{2,32.56}]
I have using lists but it only return partial or all field.
You need to rebuild the array. I've tested this code and it works:
$array = [];
foreach($temp as $k => $v) {
$array[] = [$v['id'], $v['temperature']];
}
After that just serialize this array or use as is.
The function that you search, is array_values.
Iterate over your array, use that function, and save it back to an array.
For example:
$newArray = array();
foreach ($temp as $row) {
$newArray[] = array_values($row);
}
I have an array like this:
Array(
[0]=>Array([uploaderName]=>x[uploadedImageName]=>k6gIjfO[uploaderIp]=>195.155.116.217[uploader]=>e0699587cbfd[uploadedServer]=>alpha)
[1]=>Array([uploaderName]=>x[uploadedImageName]=>byUTyJo[uploaderIp]=>195.155.116.217[uploader]=>e0699587cbfd[uploadedServer]=>alpha)
[2]=>Array([uploaderName]=>x[uploadedImageName]=>oSVEnNk[uploaderIp]=>195.155.116.217[uploader]=>e0699587cbfd[uploadedServer]=>alpha)
[3]=>Array([uploaderName]=>x[uploadedImageName]=>Dj7GRYS[uploaderIp]=>195.155.116.217[uploader]=>e0699587cbfd[uploadedServer]=>alpha)
[4]=>Array([uploaderName]=>x[uploadedImageName]=>upsb8IC[uploaderIp]=>195.155.116.217[uploader]=>e0699587cbfd[uploadedServer]=>alpha)
[5]=>Array([uploaderName]=>x[uploadedImageName]=>YoEEzGi[uploaderIp]=>195.155.116.217[uploader]=>e0699587cbfd[uploadedServer]=>alpha)
[6]=>Array([uploaderName]=>x[uploadedImageName]=>st3dLNs[uploaderIp]=>195.155.116.217[uploader]=>e0699587cbfd[uploadedServer]=>alpha)
[7]=>Array([uploaderName]=>x[uploadedImageName]=>LBNpiIG[uploaderIp]=>195.155.116.217[uploader]=>e0699587cbfd[uploadedServer]=>alpha)
[8]=>Array([uploaderName]=>x[uploadedImageName]=>mFYDmBG[uploaderIp]=>195.155.116.217[uploader]=>e0699587cbfd[uploadedServer]=>alpha)
[9]=>Array([uploaderName]=>x[uploadedImageName]=>z03kSx1[uploaderIp]=>195.155.116.217[uploader]=>e0699587cbfd[uploadedServer]=>alpha)
)
I want to get any image's data from this array.
Example: When user shows uploadedImageName == jCPjeWv, I wan't to get who is it's uploader.
Simple, just use foreach
$arr = array(/* content here */);
foreach($arr as $value){
if($value['uploadedImageName'] == 'jCPjeWv'){
echo $value['uploaderName'];
break;
}
}
Just for fun, here's another way:
echo array_column($array, 'uploaderName', 'uploadedImageName')['jCPjeWv'];
Get an array of uploaderName with the index set to uploadedImageName
Access the index using the uploadedImageName 'jCPjeWv'
Obviously to do it multiple times you would want to actually create a new array:
$images = array_column($array, 'uploaderName', 'uploadedImageName');
echo $images['jCPjeWv'];
If you want to access the other values as well, then use null instead of uploaderName:
$images = array_column($array, null, 'uploadedImageName');
echo $images['jCPjeWv']['uploaderName'];
echo $images['jCPjeWv']['uploaderIp'];
NOTE: These ways only work if the uploadedImageName is unique.
A foreach is possible, but I think it's important to learn the array functions as well so I'm just going to put this example here.
$uploadedImageName = 'jCPjeWv';
$filtered = array_filter($array, function($value) use ($uploadedImageName) {
return ($value['uploadedImageName'] == $uploadedImageName);
});
This will return a $filtered with the other arrays removed since their $value['uploadedImageName'] will not equal $uploadedImageName.
For more info check out the http://php.net/manual/en/function.array-filter.php manual.
I have an array of dictionnaries like:
$arr = array(
array(
'id' => '1',
'name' => 'machin',
),
array(
'id' => '2',
'name' => 'chouette',
),
);
How can I find the name of the array containing the id 2 (chouette) ?
Am I forced to reindex the array ?
Thank you all, aparently I'm forced to loop through the array (what I wanted to avoid), I thought that it were some lookup fonctions like Python. So I think I'll reindex with id.
Just find the index of array that contains the id you want to find.
SO has enough questions and answers on this topic available.
Assuming you have a big array with lots of data in your real application, it might be too slow (for your taste). In this case, you indeed need to modify the structure of your arrays, so you can look it up faster, e.g. by using the id as an index for the name (if you are only interested in the name).
As a for loop would be the best way to do this, I would suggest changing you array so that the id is the arrays index. For example:
$arr = array(
1 => 'machin',
2 => 'chouette',
);
This way you could just get the name for calling $arr[2]. No looping and keeping your program running in linear time.
$name;
foreach ($arr as $value){
if ( $value['id'] == 2 ){
$name = $value['name'];
break;
}
}
I would say that it might be very helpful to reindex the information. If the ID is unique try something like this:
$newarr = array();
for($i = 0;$i < count($arr);$i++){ $newarr[$arr[$i]['id']] = $arr[$i]['name']; }
The result would be:
$newarr = array('1'=>'machin','2'=>'chouette');
Then you can go trough the array with "foreach" like this:
foreach($newarr as $key => $value){
if($value == "machin"){
return $key;
}
}
But of course the same would work with your old array:
foreach($arr as $item){
if($item['name'] == "machin"){
return $item['id'];
}
}
It depends on what you are planning to do with the array ;-)
array_key_exist() is the function to check for keys. foreach will help you get down in the multidimensional array. This function will help you get the name element of an array and let you specify a different id value.
function findKey($bigArray, $idxVal) {
foreach($bigArray as $array) {
if(array_key_exists('id', $array) && $array['id'] == $idxVal) {
return $array['name'];
}
}
return false;
}
//Supply your array for $arr
print(findKey($arr, '2')); //"chouette"
It's a bit crude, but this would get you the name...
$name = false;
foreach($arr as $v) {
if($v['id'] == '2') {
$name = $v['name'];
break;
}
}
echo $name;
So no, you are not forced to reindex the array, but it would make things easier.
Please i want to loop through my table and compare values with an array in a php included file. If there is a match, return the array key of the matched item and replace it with the value of the table. I need help in returning the array keys from the include file and comparing it with the table values.
$myarray = array(
"12aaa"=>"hammer",
"22bbb"=>"pinchbar",
"33ccr"=>"wood" );
in my loop in a seperate file
include 'myarray.inc.php';
while($row = $db->fetchAssoc()){
foreach($row as $key => $val)
if $val has a match in myarray.inc.php
{
$val = str_replace($val,my_array_key);
}
}
So in essence, if my db table has hammer and wood, $val will produce 12aaa and 3ccr in the loop. Any help? Thanks a lot
You are looking for array_search which will return the key associated with a given value, if it exists.
$result = array_search( $val, $myarray );
if ($result !== false) {
$val = $result;
}
your array should look like
$myarray = array(
"hammer"=>"11aaa",
"pinchbar"=>"22bbb",
"wood"=>"33ccr" );
and code
if (isset($myarray[$key])){
//do stuff
}
I think you need the function in_array($val, $myarray);
If you don't want or can't change $myarray structure like #genesis proposed, you can make use of array_flip
include 'myarray.inc.php';
$myarray = array_flip($myarray);
while($row = $db->fetchAssoc()) {
foreach($row as $key => $val) {
if (isset($myarray[$val])) {
// Maybe you should use other variable instead of $val to avoid confusion
$val = $myarray[$val];
// Rest of your code
}
}
}
//go through each question
foreach($file_data as $value) {
//separate the string by pipes and place in variables
list($category, $question) = explode('|', $value);
//place in assoc array
$data = array($category => $question);
print_r($data);
}
This is not working as it replaces the value of data. How can I have it add an associative value each loop though? $file_data is an array of data that has a dynamic size.
You can simply do this
$data += array($category => $question);
If your're running on php 5.4+
$data += [$category => $question];
I think you want $data[$category] = $question;
Or in case you want an array that maps categories to array of questions:
$data = array();
foreach($file_data as $value) {
list($category, $question) = explode('|', $value, 2);
if(!isset($data[$category])) {
$data[$category] = array();
}
$data[$category][] = $question;
}
print_r($data);
Before for loop:
$data = array();
Then in your loop:
$data[] = array($catagory => $question);
I know this is an old question but you can use:
array_push($data, array($category => $question));
This will push the array onto the end of your current array. Or if you are just trying to add single values to the end of your array, not more arrays then you can use this:
array_push($data,$question);
For anyone that also need to add into 2d associative array, you can also use answer given above, and use the code like this
$data[$category]["test"] = $question
you can then call it (to test out the result by:
echo $data[$category]["test"];
which should print $question