how to assign id based on array values - php

Question

I am learning php please help.
I am storing values in an array and then I am trying to get the id of another array checking the value in array like this:
$arr_folders = ['one', 'two', 'whatever'];
$id_one = '';
$id_two = '';
$id_whatever = '';
foreach ($tree as $key => $value) {
if($value['name'] == 'one'){//how to check dynamically?
$id_one = $value['id'];
}
if($value['name'] == 'two'){//how to check dynamically?
$id_two = $value['id'];
}
if($value['name'] == 'whatever'){//how to check dynamically?
$id_whatever = $value['id'];
}
}
echo $id_whatever;
How can I check the arrays values dynamically. I mean I want to check if the value exist in array then assign their id.

Answer 1

You need to use in_array to check whether the element is exist or not in another array, and if found you can create dynamic variable based on $value['name'] containing $value['id'] as required.
$tree = [
['id' => 1, 'name' => 'one'],
['id' => 2, 'name' => 'two'],
['id' => 3, 'name' => 'three']
];
$arr_folders = ['one', 'two', 'whatever'];
foreach ($tree as $key => $value) {
if (in_array($value['name'], $arr_folders)) {
${'id_'.$value['name']} = $value['id'];
}
}
echo $id_one;
Working Example: https://eval.in/596034
Note: make sure $value['name'] doesn't contain spaces or any other characters which aren't allowed to declare variable names.

Answer 2

Try using array search
For example:
<?php
$arr_folders = ['one', 'two', 'whatever'];
foreach ($tree as $key => $value) {
if (($key = array_search($arr_folders, $value)) !== false) {
return $arr_folders[$key];
}
}
echo $id_whatever;

Answer 3

If I understand the question, you're asking how you can check for the contents of one array (in this case, [one, two, whatever]) in the middle of looping through the other array without hardcoding it. If that's the case, I might try something like this:
$arr_folders = ['one', 'two', 'whatever'];
$id_folders = ['', '', '']
foreach ($tree as $key => $value) {
foreach ($arr_folders as $fkey => $fvalue) { // f for folder, in this case
if($value['name'] == $fvalue){
$id_folders[$fkey] = $value['id'];
}
}
}
echo $id_folders[2];
There may be other more elegant or time-effficient solutions, but I think this captures the dynamic nature you're looking for while mirroring the actual process of the previous code.

Answer 4

here is sample code :
<?php
$arr_folders = ['one', 'two', 'whatever'];
$tree= Array(Array('id' => 1,'name' => 'one'),
Array('id' => 2,'name' => 'large'),
Array('id' => 3,'name' => 'thumb'),
Array('id' => 4,'name' => 'two'),
Array('id' => 5,'name' => 'large'),
Array('id' => 6,'name' => 'thumb')
);
foreach ($tree as $key => $value) {
if(in_array($value['name'],$arr_folders)){
$searchedIds[] = $value['id'];
}
}
print_r($searchedIds);
?>