Array of scalars and vectors at the same time in PHP

Question

I have to create an array of the following "structure" in PHP:

user_id,array(item_id,flag,array(feedback_message_id))

Basically, for each user_id, there is an array of (item_id, flag, and an array of feedback_messages)..

Within a "classes" table, I have a field called "users" that holds data with separators. An example of data will be: |1-5-1-1~2~5|2-3-4-5~6~7|.......

I would need to put the data into an array as follows:

$myArray[0][0]="1";       // the first user's user_id = 0
$myArray[0][1][0]="5";    // the first user's first item's id = 5
$myArray[0][1][1]="1";    // the first user's first item's flag = 0
$myArray[0][1][2][0]="1"; // the first user's first item's first feedback message's id = 1
$myArray[0][1][2][1]="2"; // the first user's first item's second feedback message's id = 2
$myArray[0][1][2][2]="5"; // the first user's first item's third feedback message's id = 3

I don't know how to create such an array and how to retrieve data from it (syntax-wise)... I worked with single-dimensional arrays and multidimensional array, but this is an array partially bi-dimensional, partially tri and four-dimensional... is that even possible?

Answer 1

In your case array $a represent single user so get data like:

$a=array( "user1", array( "item2", "DA", array ( "f1","f2","f3" ) ) );
$user = $a[1][2][1]; //f2

In common case it should be array of users:

<?php
$a = array( "user1", array( "item2", "DA", array ( "f1","f2","f3" ) ) ); 

var_export($a[1][2][1]);


$users = [
    ["user1", ["item2", "DA", [ "f1","f2","f3" ] ] ]
];

echo PHP_EOL . PHP_EOL ."user" . PHP_EOL;
$user = $users[0];

var_export($user);

echo PHP_EOL . PHP_EOL ."user item" . PHP_EOL . PHP_EOL;

$user_item = $users[0][1][0];

var_export($user_item);

echo PHP_EOL . PHP_EOL ."user flag" . PHP_EOL . PHP_EOL;

$user_flag = $users[0][1][1];

var_export($user_flag);

echo PHP_EOL . PHP_EOL ."user feedbacks" . PHP_EOL . PHP_EOL;

$user_flag = $users[0][1][2];

var_export($user_flag);


echo PHP_EOL . PHP_EOL ."user second feedbacks" . PHP_EOL . PHP_EOL;

$user_flag = $users[0][1][2][1];

var_export($user_flag);

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