PHP multiple arrays to one associative array - php

Question

How can I merge this three arrays
$name ={"Tom", "John", "David"};
$v1 = {"Tom":100, "David":200};
$v2 = {"John":500, "Tom":400};
into one multidimensional associative array in two different ways?
One way is the key order should be same as that of array "name".
$name_merged_original_order = array (
"Tom" => Array(
"v1" => 100,
"v2" => 400
),
"John" => Array(
"v1" => "N/A",
"v2" => 500
),
"David" => Array(
"v1" => 100,
"v2" => "N/A"
)
)
Another ways is the alphabetical of array "name":
$name_merged_asc = array (
"David" => Array(
"v1" => 100,
"v2" => "N/A"
),
"John" => Array(
"v1" => "N/A",
"v2" => 200
),
"Tom" => Array(
"v1" => 100,
"v2" => 400
),
)
The tricky part is that array "v1" and "v2" is not ordered as the key of "name." They also don't have all keys as in "name." Thanks!

Answer 1

It's not tested and the easiest solution:
$name_merged_original_order = array();
foreach($name as $key){
$name_merged_original_order[$key] = array();
if(array_key_exists($key, $v1)){
$name_merged_original_order[$key]['v1'] = $v1[$key];
}
else{
$name_merged_original_order[$key]['v1'] = 'N/A';
}
if(array_key_exists($key, $v2)){
$name_merged_original_order[$key]['v2'] = $v2[$key];
}
else{
$name_merged_original_order[$key]['v2'] = 'N/A';
}
}
sort($name);
$name_merged_asc = array();
foreach($name as $key){
$name_merged_asc[$key] = array();
if(array_key_exists($key, $v1)){
$name_merged_asc[$key]['v1'] = $v1[$key];
}
else{
$name_merged_asc[$key]['v1'] = 'N/A';
}
if(array_key_exists($key, $v2)){
$name_merged_asc[$key]['v2'] = $v2[$key];
}
else{
$name_merged_asc[$key]['v2'] = 'N/A';
}
}

Answer 2

As I understand you would like something like that:
$name = array("Tom", "John", "David");
$result = array();
$v1 = array("Tom" => "200", "John" => "100", "David" => "10");
$v2 = array("Tom" => "254", "David" => "156");
$vars = array("v1", "v2");
foreach($name as $n)
{
$result[$n] = array();
foreach($vars as $v)
{
if(array_key_exists($n, ${$v}))
$result[$n][$v] = ${$v}[$n];
}
}
I hope $result is what you need.

Answer 3

For Example, you have these arrays:
<?php
$FirstArrays = array('a', 'b', 'c', 'd');
$SecArrays = array('1', '2', '3', '4');
1)
foreach($FirstArrays as $index => $value) {
echo $FirstArrays[$index].$SecArrays[$index];
echo "<br/>";
}
or 2)
for ($index = 0 ; $index < count($FirstArrays); $index ++) {
echo $FirstArrays[$index] . $SecArrays[$index];
echo "<br/>";
}

Answer 4

Assume from your comments you only want items that match in all 3 arrays:
for( $i=0; $i< count($name) ; $i++){
if( !empty( $v1[ $name[$i]]) && !empty( $v2[ $name[$i]]) ){
$newArray[$name[$i]]= array( 'v1'=> $v1[ $name[$i]], 'v2'=> $v2[ $name[$i]]):
}
}
To sort:
asort($newArray);