Turn multiple arrays into JSON - php

Question

I am trying to make a JSON object out of multiple Array in PHP.
$a = array("Wis","Dex","Cha" );
$b = array(1,2,2);
$c = array("Perception","Stealth","Intimidation");
$d = array(8,5,1);
and I'm trying to get a bunch of JSON out of it such as this:
{ $c[0]:$d[0], "Stat":$a[0], "Multiplier:$b[0] };
and to get all those JSON and turn them in a string. But I've been trying to understand how json_encode works, but I cannot figure it out. I am hoping someone will be able to explain to me how to manipulate these values to turn them in JSON.

Answer 1

You can manually create the desired array using a for loop, then use json_encode on it. You have to be sure that the four arrays are the same size though.
$n = count($a);
$combined = array();
for ($i = 0; $i < $n; $i++) {
$entry = array();
$entry[$c[$i]] = $d[$i];
$entry["Stat"] = $a[$i];
$entry["Multiplier"] = $b[$i];
$combined[$i] = $entry;
}
$json = json_encode(combined);

Answer 2

How do you want the data to come out? As a JSON array of JSON object strings, or each string individually?
<?php
$a = array("Wis","Dex","Cha" );
$b = array(1,2,2);
$c = array("Perception","Stealth","Intimidation");
$d = array(8,5,1);
$data[$c[0]]=$d[0];
$data["Stat"]=$a[0];
$data["Multiplier"]=$b[0];
print(json_encode($data));
?>
Will give you something like
{"Perception":8,"Stat":"Wis","Multiplier":1}
If you want an array of those, then a few changes:
<?php
$a = array("Wis","Dex","Cha" );
$b = array(1,2,2);
$c = array("Perception","Stealth","Intimidation");
$d = array(8,5,1);
for($i=0;$i<count($a);$i++){
$data[$i][$c[$i]]=$d[$i];
$data[$i]["Stat"]=$a[$i];
$data[$i]["Multiplier"]=$b[$i];
}
print(json_encode($data));
?>
Which will give you something like
[{"Perception":8,"Stat":"Wis","Multiplier":1},
{"Stealth":5,"Stat":"Dex","Multiplier":2},
{"Intimidation":1,"Stat":"Cha","Multiplier":2}]