PHP_2(array)

var_dump() is a PHP function that is used for debugging and displaying information about variables, arrays, or objects. It provides detailed information about the structure and type of a variable, helping developers understand the content and structure of their data during the development process.

explode

<?php

$fruits = "apples, bananas, pears, pluns";

$fruitBasket = explode(",", $fruits);
var_dump($fruitBasket);
/*
array(4) {
  [0]=>
  string(6) "apples"
  [1]=>
  string(8) " bananas"
  [2]=>
  string(6) " pears"
  [3]=>
  string(6) " pluns"
}*/
?>

simple array

<?php

$toppings = array(); // make it 2d array
$toppings = ["Cheese", "Pepperoni", "Anchovies"];

$toppings[] = "Corn"; // append

rsort($toppings); // reverse sort
var_dump($toppings);
/*
array(4) {
  [0]=>
  string(9) "Pepperoni"
  [1]=>
  string(4) "Corn"
  [2]=>
  string(6) "Cheese"
  [3]=>
  string(9) "Anchovies"
}
*/

print letters depending on the range

$letters = range('a', 'f');


for ($i = 0; $i < count($letters); $i++){
    // re-assign
    $letters[$i] = array($letters[$i], $i + 10);
}
var_dump($letters);

/*    int(10)
  }
  [1]=>
  array(2) {
    [0]=>
    string(1) "b"
    [1]=>
    int(11)
  }
  [2]=>
  array(2) {
    [0]=>
    string(1) "c"
    [1]=>
    int(12)
  }
  [3]=>
  array(2) {
    [0]=>
    string(1) "d"
    [1]=>
    int(13)
  }
  [4]=>
  array(2) {
    [0]=>
    string(1) "e"
    [1]=>
    int(14)
  }
  [5]=>
  array(2) {
    [0]=>
    string(1) "f"
    [1]=>
    int(15)
  }
}
*/
?>

key value

<?php
$courses["key"] = "value";

$courses[] = "val1"; // this is considered key=0
$courses[] = "val2"; // this is considered key=1

asort($courses); // sorted by the values
ksort($courses); // sorted by the keys
arsort($courses); // sorted by the values, reverse
krsort($courses); // sorted by the keys, reverse

?>