common array methods php

1$colors = array("blue","green","red");
2
3//delete element in array by value "green"
4if (($key = array_search("green", $colors)) !== false) {
5    unset($colors[$key]);
6}

1sizeof($arr) //returns the size of elements in the array
2is_array($arr) // returns true if $arr is an array and false otherwise
3in_array($var, $arr) // check if $var is in the array $arr
4print_r($arr) // prints the complete representation of the array
5array_merge($arr1, $arr2) //combines $arr1 and $arr2 into a single array
6array_values($arr) //store all the values into a new array without the keys but only the values
7array_keys($arr) // returns only the keys inside an array
8array_pop($arr) // removes the last element of  the array
9array_push($arr, $val) // pushes $val to the end of array
10array_shift($arr) // removes the first element in the array $arr
11sort($arr) // sorts an array in an ascending order
12
13/*Other sorting methods are:
14-asort()
15-arsort()
16-ksort()
17-krsort()
18-rsort()
19*/
20
21array_map('function_name', $arr) // passes each value in the array inside the fuction and do the operation on the array data
22array_flip($arr) //This function interchange the keys and the values of a PHP associative array.
23array_reverse($arr) //This function is used to reverse the order of elements
24array_rand($arr) //randomly pick an element from the array
25array_slice($arr, $offset, $length)//This function is used to create a subset of any array
26
27
28
29
30
31

1if (count($arr) > 1) {
2     ....
3}

1$key_of_max_value = array_search(max($arrCompare),$arrCompare);

1print_r(deep_delete_keys($arr,'country'));
2
3function deep_delete_keys($arr, $keys) {
4    if (!is_array($keys)) $keys = array($keys);
5    $filteredArr = array_diff_key( $arr, array_flip( $keys ) );
6    foreach ($filteredArr as &$val) {
7        if (is_array($val)) {
8            $val = deep_delete_keys($val, $keys);
9        }
10    }
11    return $filteredArr;
12}

1
2const triplets = (arr1,arr2) => {
3  let score1 = 0;
4  let score2 = 0;
5  let resultArr = [0,0]
6  for (let i = 0; i < arr1.length; i++){
7    if(arr1[i] === arr2[i]) {
8      resultArr[0] = score1
9      resultArr[1] = score2
10    } else if (arr1[i] > arr2[i]) {
11      score1++
12      resultArr[0] = score1
13    } else if (arr1[i] < arr2[i]) {
14      score2++
15      resultArr[1] = score2
16    }
17  }
18  return resultArr
19}

1
2<?php
3$array = array(
4    "foo" => "bar",
5    42    => 24,
6    "multi" => array(
7         "dimensional" => array(
8             "array" => "foo"
9         )
10    )
11);
12
13var_dump($array["foo"]);
14var_dump($array[42]);
15var_dump($array["multi"]["dimensional"]["array"]);
16?>
17
18

1
2<?php
3$array = array("foo", "bar", "hello", "world");
4var_dump($array);
5?>
6
7

1$arrRoom[] = array("RoomCode" => "Deluxe",
2                    "Rates" => array ( array(
3                        "BoardCode" => "RO",
4                        "Price" => 100)
5                    ));
6$arrRoom[] = array("RoomCode" => "Standard",
7                    "Rates" => array ( array(
8                        "BoardCode" => "RO",
9                        "Price" => 100)                        
10                    ));                    
11$arrRoom[] = array("RoomCode" => "Deluxe",
12                    "Rates" => array (array(
13                        "BoardCode" => "RO",
14                        "Price" => 200)
15                    ));
16
17foreach($arrRoom as $room)
18{    
19    foreach($room['Rates'] as $rates)
20    {        
21        $nRooms[$room['RoomCode']][$rates['BoardCode']][] = array("RoomCode" => $room['RoomCode'],
22                                                            "MealCode" => $rates['BoardCode'],
23                                                            "Price" => $rates['Price']);
24    }
25}
26echo "\n ==== Output in Json Format ==== \n";
27{
28    "Deluxe": {
29        "RO": [
30            {
31                "RoomCode": "Deluxe",
32                "MealCode": "RO",
33                "Price": 100
34            },
35            {
36                "RoomCode": "Deluxe",
37                "MealCode": "RO",
38                "Price": 200
39            }
40        ]
41    },
42    "Standard": {
43        "RO": [
44            {
45                "RoomCode": "Standard",
46                "MealCode": "RO",
47                "Price": 100
48            }
49        ]
50    }
51}