When I do a print_r on my $_POST, I have an array that may look like this:
Array
(
[action] => remove
[data] => Array
(
[row_1] => Array
(
[DT_RowId] => row_1
[name] => Unit 1
[item_price] => 150.00
[active] => Y
[taxable] => Y
[company_id] => 1
)
)
)
The row_1 value can be anything formatted like row_?
I want that number as a string, whatever the number is. That key and the DT_RowID value will always be the same if that helps.
Right now I am doing this, but it seems like a bad way of doing it:
//the POST is a multidimensinal array... the key inside the 'data' array has the id in it, like this: row_2. I'm getting the key value here and then removing the letters to get only the id nummber.
foreach ($_POST['data'] AS $key => $value) {
$id_from_row_value = $key;
}
//get only number from key = still returning an array
preg_match_all('!\d+!', $id_from_row_value, $just_id);
//found I had to use [0][0] since it's still a multidimensional array to get the id value
$id = $just_id[0][0];
It works, but I'm guessing there's a faster way of getting that number from the $_POST array.
<?php
$array = [
'data' => [
'row_1' => [],
'row_2' => [],
]
];
$nums = [];
foreach ($array['data'] as $key => $val) {
$nums[] = preg_replace('#[^\d]#', '', $key);
}
var_export($nums);
Outputs:
array (
0 => '1',
1 => '2',
)
Please remember that regular expressions, used in preg_match are not the fastest solution. What I would do is split the string by _ and take the second part. Like that:
$rowId = explode("_", "row_2")[1];
And put that into your loop to process all elements.
Related
I've researched topics similar to this but not exactly what I'm looking to do.
I have a multidimensional array like the following.
[code] => BILL
[assets] => Array
(
[en] => Array
(
[datatype] => My Assets
[data] => Array
(
[Corporate Equity] => 41
[Global Equity] => 24
[Fixed Income – Government] => 22
[Fixed Income – Corporate] => 8.1
[Other] => 3.57
)
)
)
I'd like to remove the first inner array, but preserve the values. Shift them up one level in the array so that it looks like this.
[code] => BILL
[assets] => Array
(
[datatype] => My Assets
[data] => Array
(
[Corporate Equity] => 41
[Global Equity] => 24
[Fixed Income – Government] => 22
[Fixed Income – Corporate] => 8.1
[Other] => 3.57
)
)
This is just the beginning of the array, there are other instances of the same key [en] at the same level.
I've tried unset, array_shift and others but I need to keep the contents of [en], just shift them up one level in the array.
You can use array_map which returns an array which contains all elements of the previous array after applying the function.
In this case it will simply take the array at index en and add it's contents to the new array.
http://php.net/manual/en/function.array-map.php
$arr = array('assets' => array(
'en' => array(
'datatype' => 'My Assets',
'data' => array(
'Corporate Equity' => 41,
'Global Equity' => 24,
'Fixed Income – Government' => 22,
'Fixed Income – Corporate' => 8.1,
'Other' => 3.57
)
)
));
$new_arr = array_map(function ($e) {
return $e['en'];
}, $arr);
A simple solution that assumes the key to always be en and the subkeys to always be (only) datatype and data:
$assets['datatype'] = $assets['en']['datatype'];
$assets['data'] = $assets['en']['data'];
unset( $assets['en'] );
This code could be problematic for you in the future if that array structure ever changes (it lacks extensibility), but it gets you what you want given the information you have provided.
array_shift is the opposite of array_pop. Used in stack/queue like structures for removing the fist element http://php.net/manual/en/function.array-shift.php
What you want to do is flatten the array. But if you want to keep all the other sub-arrays as you mentioned, you might look up array_merge.
I faced the same scenario after using reader to read xml file, the returned array was having inserted 0 key array in each level like the following one:
'config' =>
0 =>
'products' =>
0 =>
'media' =>
.
.
.
so I built a small function to get rid of a specific key and shift up its child's in a two dimensions array, in my case the key was 0. hopping this would help somebody also.
public function clearMaps(&$maps, $readerMaps, $omittedKey)
{
if (is_array($readerMaps)) {
foreach ($readerMaps as $key => $map) {
if ($key !== $omittedKey) {
$maps[$key] = [];
$this->clearMaps($maps[$key], $readerMaps[$key], $omittedKey);
} else {
$this->clearMaps($maps, $readerMaps[$key], $omittedKey);
}
}
} else {
$maps = $readerMaps;
}
}
// $maps: cleaned array, will start as empty array
// $readerMaps: array needs to be cleaned
// $omittedKey: array key to git rid of.
// first call is clearMaps([], $readerMaps, 0);
Get First element in array as array with corresponding key
For example,
An
Array
(
[Actor] => 1
[Producer] => 1
[Director] => 2
)
I want to get first element with its corresponding key
Array
(
[Actor] => 1
)
How can it be done without looping using some array functions ?
array_slice($arr,0,1), array_splice($arr,0,1);, or list($key,$value)=each($arr) may interest you to solve this problem.
Alternatively, use list() and each() to get the first element:
list($key, $val) = each($arr);
Something like this:
$array = ('actor' => 1, 'producer' => 1, 'director' => 2);
$firstKey = key($array);
$newArray = array();
$newArray[$firstKey] = $array[$firstKey];
var_dump($newArray);
My array structure is
Array
(
[customer_id] => Array
(
[0] => Array
(
[customer_id] => 123
)
)
[menu_item_net_price] => 1700
[menu_item_tax_price] => 4%
[menu_item_gross_price] => 1700
[provider_id] => 123
)
I need to get the value of [customer_id] => 123. Tell me how can I do that?
Still my problem is not solved so I am posting code:
$data['customer_id'] = $this->session->userdata('id');
$data['menu_item_net_price']= $netPrice;
$data['menu_item_tax_price']= '4%';
$data['menu_item_gross_price']= $netPrice;
$data['provider_id']= 123;
echo '<pre>';
print_r($data);
echo '</pre>';
exit(0);
Just go through your array step by step until you are at the needed property.
$arr[ 'id' ][ 0 ][ 'customer_id' ]
Either
$array["id"][0]["customer_id"]
or if you want to get all customers' ids, use foreach
foreach($array["id"] as $index => $data) {
$customer_id = $data["customer_id"]
}
There are two approach to get the value of customer_id.
1. If you array is dynamic and you are not sure, what will be the key value, you can use key or array_keys function of php. Then you can retrieve it.
array['id'][$key]['customer_id']
for multiple keys, you can use foreach loop.
2.If is static array, then you can get it direct.
array['id'][0]['customer_id']
I am trying to edit a plugin that is fetching a multidimensional array, then breaking it out into a foreach statement and doing stuff with the resulting data.
What I am trying to do is edit the array before it gets to the foreach statement. I want to look and see if there is a key/value combination that exists, and if it does remove that entire subarray, then reform the array and pass it to a new variable.
The current variable
$arrayslides
returns several subarrays that look like something like this (I remove unimportant variables for the sake of briefness):
Array (
[0] => Array (
[slide_active] => 1
)
[1] => Array (
[slide_active] => 0
)
)
What I want to do is look and see if one of these subarrays contains the key slide_active with a value of 0. If it contains a value of zero, I want to dump the whole subarray altogether, then reform the multidimensional array back into the variable
$arrayslides
I have tried a few array functions but have not had any luck. Any suggestions?
$arrayslides = array(0 => array ( 'slide_active' => 1, 'other_data' => "Mark" ),
1 => array ( 'slide_active' => 0, 'other_data' => "ABCDE" ),
2 => array ( 'slide_active' => 1, 'other_data' => "Baker" ),
3 => array ( 'slide_active' => 0, 'other_data' => "FGHIJ" ),
);
$matches = array_filter($arrayslides, function($item) { return $item['slide_active'] == 1; } );
var_dump($matches);
PHP >= 5.3.0
I know its not so efficient but still
foreach ($arraySlides as $key => $value)
{
if(in_array('0', array_values($value))
unset($arraySlides[$key]);
}
I'm new to working with arrays so I need some help. With getting just one vaule from an array. I have an original array that looks like this:
$array1= Array(
[0] => 1_31
[1] => 1_65
[2] => 29_885...)
What I'm trying to do is seach for and return just the value after the underscore. I've figured out how to get that data into a second array and return the vaules as a new array.
foreach($array1 as $key => $value){
$id = explode('_',$value);
}
which gives me:
Array ( [0] => 1 [1] => 31 )
Array ( [0] => 1 [1] => 65 )
Array ( [0] => 29 [1] => 885 )
I can also get a list of the id's or part after the underscore by using $id[1] I'm just not sure if this is the best way and if it is how to do a search. I've tried using in_array() but that searches the whole array and I couldn't make it just search one key of the array.
Any help would be great.
If the part after underscore is unique, make it a key for new array:
$newArray = array();
foreach($array1 as $key => $value){
list($v,$k) = explode('_',$value);
$newArray[$k] = $v;
}
So you can check for key existence with isset($newArray[$mykey]), which will be more efficient.
You can use preg_grep() to grep an array:
$array1= array("1_31", "1_65", "29_885");
$num = 65;
print_r(preg_grep("/^\d+_$num$/", $array1));
Outputs:
Array
(
[1] => 1_65
)
See http://ideone.com/3Fgr8
I would say you're doing it just about as well as anyone else would.
EDIT
Alternate method:
$array1 = array_map(create_function('$a','$_ = explode("_",$a); return $_[1];'),$array1);
echo in_array(3,$array1) ? "yes" : "no"; // 3 being the example
I would have to agree. If you wish to see is a value exists in an array however just use the 'array_key_exists' function, if it returns true use the value for whatever.