Check if multidimensional array contains array according given array of keys to check

Question

I have a Array containing a set of Arrays...

array (size=5)
  0 => 
    array (size=7)
      'BMS' => 
        array (size=2)
          'key' => string 'Boomsoort' (length=9)
          'value' => string 'Naaldhout - gewone den' (length=22)
      'ONT' => 
        array (size=2)
          'key' => string 'Ontwikkelingsfase' (length=17)
          'value' => string 'Middeloud naaldhout (20 - 60j)' (length=30)
      'SLG' => 
        array (size=2)
          'key' => string 'Sluitingsgraad' (length=14)
          'value' => string 'Meer dan 2/3' (length=12)
      'BED' => 
        array (size=2)
          'key' => string 'Bedrijfsvorm' (length=12)
          'value' => string 'Hooghout' (length=8)
      'NISCODE' => 
        array (size=2)
          'key' => string 'Gemeentecode overeenkomstig het NIS' (length=35)
          'value' => string '46021' (length=5)
      'KLASSE' => 
        array (size=2)
          'key' => string 'Bosclassificatie' (length=16)
          'value' => string 'Bos' (length=3)
      'POLNR' => 
        array (size=2)
          'key' => string 'Polygoonnummer' (length=14)
          'value' => string '32239' (length=5)
  1 => 
    array (size=7)
      'BMS' => 
        array (size=2)
          'key' => string 'Boomsoort' (length=9)
          'value' => string 'Loofhout - eik of Amerikaanse eik' (length=33)
      'ONT' => 
        array (size=2)
          'key' => string 'Ontwikkelingsfase' (length=17)
          'value' => string '10' (length=2)
      'SLG' => 
        array (size=2)
          'key' => string 'Sluitingsgraad' (length=14)
          'value' => string 'Meer dan 2/3' (length=12)
      'BED' => 
        array (size=2)
          'key' => string 'Bedrijfsvorm' (length=12)
          'value' => string 'Hooghout' (length=8)
      'NISCODE' => 
        array (size=2)
          'key' => string 'Gemeentecode overeenkomstig het NIS' (length=35)
          'value' => string '46021' (length=5)
      'KLASSE' => 
        array (size=2)
          'key' => string 'Bosclassificatie' (length=16)
          'value' => string 'Bos' (length=3)
      'POLNR' => 
        array (size=2)
          'key' => string 'Polygoonnummer' (length=14)
          'value' => string '32239' (length=5)

I also have an Array that holds a list of Array keys that should be used to check the main Array (definition above) upon adding a new entry. If these key / values already excist - I don't want to add the item to the main Array. If one or more key / values does not excist ... the array can be added to the main collection.

  array (size=7)
    'BMS',       
    'ONT',     
    'SLG',
    'BED',      
    'NISCODE',        
    'KLASSE',     
    'POLNR'

Situation 1 ; adding a Arraythat already excists on all defined keys.

array (size=7)
  'BMS' => 
    array (size=2)
      'key' => string 'Boomsoort' (length=9)
      'value' => string 'Loofhout - eik of Amerikaanse eik' (length=33)
  'ONT' => 
    array (size=2)
      'key' => string 'Ontwikkelingsfase' (length=17)
      'value' => string '10' (length=2)
  'SLG' => 
    array (size=2)
      'key' => string 'Sluitingsgraad' (length=14)
      'value' => string 'Meer dan 2/3' (length=12)
  'BED' => 
    array (size=2)
      'key' => string 'Bedrijfsvorm' (length=12)
      'value' => string 'Hooghout' (length=8)
  'NISCODE' => 
    array (size=2)
      'key' => string 'Gemeentecode overeenkomstig het NIS' (length=35)
      'value' => string '46021' (length=5)
  'KLASSE' => 
    array (size=2)
      'key' => string 'Bosclassificatie' (length=16)
      'value' => string 'Bos' (length=3)
  'POLNR' => 
    array (size=2)
      'key' => string 'Polygoonnummer' (length=14)
      'value' => string '32239' (length=5)

Situation 2 ; adding a Arraythat does not excists on all defined keys. Note that the BMSkey has a value that the main collection does not know yet.

array (size=7)
  'BMS' => 
    array (size=2)
      'key' => string 'Boomsoort' (length=9)
      'value' => string 'Unadded value' (length=33)
  'ONT' => 
    array (size=2)
      'key' => string 'Ontwikkelingsfase' (length=17)
      'value' => string '10' (length=2)
  'SLG' => 
    array (size=2)
      'key' => string 'Sluitingsgraad' (length=14)
      'value' => string 'Meer dan 2/3' (length=12)
  'BED' => 
    array (size=2)
      'key' => string 'Bedrijfsvorm' (length=12)
      'value' => string 'Hooghout' (length=8)
  'NISCODE' => 
    array (size=2)
      'key' => string 'Gemeentecode overeenkomstig het NIS' (length=35)
      'value' => string '46021' (length=5)
  'KLASSE' => 
    array (size=2)
      'key' => string 'Bosclassificatie' (length=16)
      'value' => string 'Bos' (length=3)
  'POLNR' => 
    array (size=2)
      'key' => string 'Polygoonnummer' (length=14)
      'value' => string '32239' (length=5)

I'm looking for the best way of checking the main Array collection if it already contains an Array where the keys needed to be checked are given by an other Array.

I've tried looping the 3 Arrays to check with each other - the code I've created is quite robust and big. I would like to see some fresh tries that can lead me in reducing the lines of code... Pseudo code for what I have

/**
* @Param collection = Global collection
* @Param requirekeystocheck = Array keys to check for excistance
* @Param arraytoadd = Array to be added
* @return Boolean
*/
Function checkExcistArrayOfKeysForArray($collection, $requirekeystocheck, $arraytoadd){
    Loop main Array $collection as $collectionItem
        Loop Array $requirekeystocheck with keys to check as $uniqueKey
            Check if main $collectionItem[$uniqueKey] contains $arraytoadd[$uniqueKey] 
                Check if the values are equal (already present)

    If all values in $requirekeystocheck excist in $collectionItem - the item that needs to be added already excists. 
        Return TRUE 
    If not all values excist - the item can be added
        Return TRUE

}

Thanks...

lunjius · Accepted Answer · 2017-11-02 18:12:14Z

1

Think about using a php class. This all looks like it could be replaced pretty easily by such. The class could look like this:

class myClass {

    public $bms = '';
    public $ont = '';
    public $slg = '';
    public $bed = '';
    public $niscode = '';
    public $klasse = '';
    public $polnr = '';

    function __construct($cData) {
        $this->bms = $cData[0];
        $this->ont = $cData[1];
        $this->slg = $cData[2];
        $this->bed = $cData[3];
        $this->niscode = $cData[4];
        $this->klasse = $cData[5];
        $this->polnr = $cData[6]
    }

    function equals($obj) {
        // this function receives another instance of the class and checks whether both instances are identical
        if ($obj->bms != $this->bms) { return false; }
        if ($obj->ont!= $this->ont) { return false; }
        if ($obj->slg != $this->slg) { return false; }
        if ($obj->bed != $this->bed) { return false; }
        if ($obj->niscode != $this->niscode) { return false; }
        if ($obj->klasse != $this->klasse) { return false; }
        if ($obj->polnr != $this->polnr) { return false; }
        return true;
    }

}

The only thing I am unsure about is the little array with "key" and "value", that you use all the time. Is there no way to get rid of it? I cannot tell, because I don't know the purpose of these values. If you explain their sense, I might imagine another one. If this is impossible, better make another class for it (similar to a datatype):

class myDatatype {

    public $key = '';
    public $value = '';

    public construct __construct($key, $value) 
        $this->key = $key;
        $this->value = $value;
    }

}

All varibles in myClass get then as data an instance of myClass, like the following:

$example->bms = new myDatatype("Bomsoort", "Somewhat");

The way of adding new values to the class depends on the type the variables of "myClass" are of. The following example assumes that you used the solution via "myDatatype":

$data = array(/* bms */ new myDatatype("key", "value"), ..., /* polnr */ myDatatype("key", "value"));
$example = new myClass($data);

As this can become quite confusing, think about another function, that takes all necessary values and does exactly what I wrote above. thingy = new myClass($data);

edited Nov 2, 2017 at 18:12

answered Nov 2, 2017 at 18:05

lunjius

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2 Comments

daan.desmedt Over a year ago

Thanks for you input. The key values are dynamic... they differ according the context. I would need dynamic way to check... without defining the keys as class parameters....

lunjius Over a year ago

Could you describe the problem you want to solve with it? If the keys of the Sub-Arrays ('BMS' etc.) need to be dynamic, what about a class with one associative Array as variable? The keys of this array are 'BMS etc., the values of it are the data represented by myDatatype. Advantage: You could write functions returning all indeces of the array, checks whether another object is equal or easily creates everything with the given data

Nilesh Lathe · Accepted Answer · 2017-11-02 18:55:23Z

Try array search method to search array with array_column Refer bellow solution of adding item to cart using session

<?php
 session_start();
 $pr_id = $_REQUEST['id'];
 $quantity = isset($_REQUEST['quantity'])?$_REQUEST['quantity']:1;
 if(isset($_REQUEST['action']) && $_REQUEST['action']=='add')
{
  if(isset($_SESSION['cartitems']))
  {
     //find index of an array if it exits then do not add else add to cart and then
    if (!array_key_exists($pr_id,$_SESSION['cartitems']))
    {
        $_SESSION['cartitems'][$pr_id]['id'] = $pr_id;
        $_SESSION['cartitems'][$pr_id]['quantity'] = $quantity;
    }
   }
  else
  {
    $_SESSION['cartitems'][$pr_id]['id'] = $pr_id;
    $_SESSION['cartitems'][$pr_id]['quantity'] = $quantity;     
  }
  $arr = array();
  $arr['count'] = count($_SESSION['cartitems']);
  $arr['message'] = 'Item successFully added';
  echo json_encode($arr);
 }

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