Other ways to add element in an array? - php

Question

$a = ['foo' => 'bar'];
If I want to add new elements in this array I would usually write this
$a['foo2'] = 'bar2';
$a['foo3'] = 'bar3';
$a['foo4'] = 'bar4';
Is there some other syntax so I can add elements like this without overwriting $a?
$a = [ 'foo2' => 'bar2',
'foo3' => 'bar3',
'foo4' => 'bar4'];

Answer 1

You can also do something like this:
$arr1 = array('foo2' => 'bar2');
$arr2 = array('foo3' => 'bar3');
$arr3 = $arr1 + $arr2;

Answer 2

You can use array_merge to add an array to the end of another array.
$a = array_merge($a, $b);
where $b is:
$b = [ 'foo2' => 'bar2',
'foo3' => 'bar3',
'foo4' => 'bar4'];

Answer 3

Or just do:
$a = ['foo' => 'bar'];
$a = array_merge([$a,'foo2' => 'bar2',
'foo3' => 'bar3',
'foo4' => 'bar4'];
Will return what you want.

Answer 4

You could create a simple Function for that like so:
<?php
/**
* #param $mainArray => THE ARRAY TO WHICH OTHER ELEMENTS (INCL. ARRAYS/OBJECTS) SHOULD BE ADDED
* #param $data => A KEY-VALUE PAIR ARRAY OR A NORMAL STRING/NUMBER
* #return array
*/
function arrayAdd(&$mainArray, $data){
if(is_array($data)){
foreach($data as $k=>$v){
$mainArray[$k] = $v;
}
}else if(is_string($data)){
$mainArray[] = $data;
}
return $mainArray;
}
// CREATE A OBJECT (TO SHOW IT COULD ALSO HANDLE THAT AS WELL)
$obj = new stdClass();
$obj->name = 'Some Name';
$obj->tel = '[phone]';
// THE MAIN ARRAY TO WHICH OTHER ELEMENTS SHOULD BE ADDED
$main = ['foo1' => 'bar1', 'foo2' => 'bar2'];
// A COLLECTION OF DATA TO ADD TO $main
$data = [
'one' => 'Un',
'two' => 'Deux',
'three' => 'Trois',
'four' => 'Quart',
'obj' => $obj,
];
// CALL THE FUNCTION AND PASS THE PARAMETERS
var_dump( arrayAdd($main, $data) );
// YIELDS::
array (size=7)
'foo1' => string 'bar1' (length=4)
'foo2' => string 'bar2' (length=4)
'one' => string 'Un' (length=2)
'two' => string 'Deux' (length=4)
'three' => string 'Trois' (length=5)
'four' => string 'Quart' (length=5)
'obj' =>
object(stdClass)[1]
public 'name' => string 'Some Name' (length=9)
public 'tel' => string '[phone]' (length=19)

Answer 5

How about this ?
I think it is simplest to add element into an array
<?php
$cart = [];
//to add one
array_push($cart, 13);
// to add multiple
array_push($cart, 13,14,15);
?>