How to add element into array on php recursive loop? - php

Question

function test_loop($x_values,$x, $y)
{
$x = $x + 1;
if($x < 10)
{
$x_values[] = $x."#"; // insert item 2#,3#,4# into array
}
//loop again if y is not = 3;
$y = $y + 1;
if($y < 5)
{
test_loop($x_values, $x, $y);
}
return $x_values;
}
function abc(){
$bababa = test_loop([],1,0);
foreach($bababa as $fpackage_id)
{
echo $fpackage_id;
}
}
abc();
Output :
2#
How to make the output become :
2#,3#,4#

Answer 1

if($y < 5)
{
test_loop($x_values, $x, $y);
}
You're not doing anything with the return value of the recursive function call.
You need to add the array returned from test_loop() to the existing array:
$x_values += test_loop($x_values, $x, $y);
Your code now prints: 2#3#4#5#6#
If you want the output to be 2#, 3#, 4#, 5#, 6#, you can use the implode() function instead of a loop:
echo implode (', ', $bababa);

Answer 2

You'll want to utilize pass by reference:
https://www.php.net/manual/en/language.references.pass.php
I haven't looked too closely at your code, you may need to make more changes than this... but this might work:
function test_loop(&$x_values,$x, $y)
{
$x = $x + 1;
if($x < 10)
{
$x_values[] = $x."#"; // insert item 2#,3#,4# into array
}
//loop again if y is not = 3;
$y = $y + 1;
if($y < 5)
{
test_loop($x_values, $x, $y);
}
return $x_values;
}
function abc(){
$bababa = test_loop([],1,0);
foreach($bababa as $fpackage_id)
{
echo $fpackage_id;
}
}
abc();

Answer 3

You should use array_push() function to add an element in the array
Documentation
if($x < 10)
{
array_push($x_values,$x.'#');
}