Changing index in arrays PHP [duplicate] - php

Question

This question already has answers here:
how to change index of an array in php [duplicate]
(3 answers)
Closed 4 years ago.
Good day everyone,
I was tasked to change index in arrays.
here is my code:
$file = Storage::get('upload/test.txt');
$lines = explode('\n', $file);
$array = array_map(function($line) {
return explode(',', $line);
}, $lines);
print_r($array);
output is:
Array
(
[0] => Array
(
[0] => john
[1] => male
[2] => 20
[3] => 200
[4] => 174
)
[1] => Array
(
[0] => joe
[1] => male
[2] => 24
[3] => 157
[4] => 166
)
[2] => Array
(
[0] => bea
[1] => female
[2] => 18
[3] => 153
[4] => 160
)
[3] => Array
(
[0] => edd
[1] => male
[2] => 30
[3] => 180
[4] => 180
)
)
what i need to happen is:
Array
(
[0] => Array
(
[name] => john
[sex] => male
[age] => 20
[height] => 200
[weight] => 174
)
[1] => Array
(
[name] => joe
[sex] => male
[age] => 24
[height] => 157
[weight] => 166
)
[2] => Array
(
[name] => bea
[sex] => female
[age] => 18
[height] => 153
[weight] => 160
)
[3] => Array
(
[name] => edd
[sex] => male
[age] => 30
[height] => 180
[weight] => 180
)
)
thanks in advance! :)

Answer 1

You want an associative array.
$newArray = []; // create a new empty array to store your associative arrays.
// Loop through each element in array.
foreach($array as $aPerson) {
// map each element in array into an associative array.
$person = [
"name" => $aPerson[0],
"sex" => $aPerson[1],
"age" => $aPerson[2],
"height" => $aPerson[3],
"weight" => $aPerson[4]
];
// Add your associative array to your new re-indexed array.
array_push($newArray, $person);
}
I hope this helps.
The following should print the array in the format you want.
print_r($newArray);

Answer 2

Simple, Like this:
$arr = [
['joe','male',24,157,166]
];
#mind the & pass by refrence
foreach($arr as &$item){
$item = array_combine(['name','sex','age','height','weight'],$item);
}
print_r($arr);
Output
Array
(
[0] => Array
(
[name] => joe
[sex] => male
[age] => 24
[height] => 157
[weight] => 166
)
)
Sandbox
Note array_combine will blow up if the 2 arrays are not the same size.
You can do this too (84 bytes)
$arr = [['joe','male',24,157,166]];
$headers = ['name','sex','age','height','weight'];
$arr = array_map(function($item)use($headers){return array_combine($headers,$item);},$arr);
print_r($arr);
Same output
Sandbox

Answer 3

A possible solution will be to create a new array, loop through the current one and add the indexes:
$new_array = array();
foreach ($array as $element) {
$new_array[] = array(
'name' => $element[0],
'sex' => $element[1],
'age' => $element[2],
'height' => $element[3],
'weight' => $element[4]
);
$i++;
}

Answer 4

Here is how I would do what you're trying to achieve
<?php
$fp = #fopen('upload/test.txt', 'r'); $props = ['name', 'sex', 'age', 'height', 'weight']; $r = [];
if($fp) {
while(($line = fgets($fp)) !== false) {
$x = explode(',', $line); $a = [];
foreach($props as $k => $v){
$a[$v] = $x[$k];
}
$r[] = $a;
}
fclose($fp);
}
print_r($r);
?>