Problem solving

test.php

<?php
//Basis Knowledge Test:
//==========================

//1. Write a PHP function that to remove all zeroes from a string and return 3 different output.
//Input String : '000892021.2408000'
//Expected below outputs
//Output 1: '892021.2408' (all zeros remove from start and end)
//Output 2: '892021.2408000' (remove only start zero)
//Output 3: '000892021.2408' (remove only end zero)
//Example Uses: echo remove_zero('000892021.2408000', 'all');

function remove_zero($str, $con = 'all')
{
    if ($con) {
        $left_trim = ltrim($str, "0");
        $right_trim = rtrim($str, "0");
        $all_trim = ltrim($right_trim);

//Output
        echo "Output All: '" . $all_trim . "' (all zeros remove from start and end)<br>";
        echo "Output Left: '" . $left_trim . "' (remove only start zero)<br>";
        echo "Output Right: '" . $right_trim . "' (remove only end zero)";
    }
}

echo remove_zero('000892021.2408000', 'all');


//2. Write a PHP function that accept 1 parameter as string and return all value in JSON format as bellow reference.
//Input Array: array("gateway" => array("bkash"), "currency" => array("usd", "cad"));
//Expected Output: '{"type":"currency","value":["usd", "cad"]}'
//Example Uses: var_dump(get_data('currency));

function get_data($a){
    $data = array();
    $data['gateway'] = array("bkash");
    $data['currency'] = array("usd", "cad");
    $b = array();
    $b[type] = $a;
    $b[value] = $data[$a];
    return Json_encode($b);
}
var_dump(get_data('currency'));