I have this array. I want to get the array values to a same array,how can I achieve that?

Array
(
    [0] => Array
        (
            [referrer_id] => usr157
        )

    [1] => Array
        (
            [referrer_id] => usr42
        )

)

I want this array to be

array("usr157", "usr42")

CodePudding user response：

use array_walk_recursive to achieve the result as follows

<?php

$main = [];
$ref = 
    [
        [
            "referrer_id" => "usr157"
        ],
        [
            "referrer_id" => "usr42"
        ]
    ];
 
array_walk_recursive($ref, function ($item, $key) use(&$main) {
    $main[] = $item;
} );

print_r($main);

You can check that out here

CodePudding user response：

You can just access the array components like this:

// The next line just recreates your example array into a variable called $x:
$x = array(array('referrer_id' => 'usr157'), array('referrer_id' => 'usr42'));

$result = array($x[0]['referrer_id'], $x[1]['referrer_id']);

print_r($result); //print the result for correctness checking

$result will be the output array you wanted.

Using $x[0], you refer the first element of your input array (and hence, $x[1] the second one, ...). Adding ['referrer_id'] will access its referrer_id key. The surrounding array(...) puts the values into an own array.

You can "automate" the whole thing in case you have a bigger input array using a loop.

CodePudding user response：

You may use array_column to achieve that

$flatten = array_column($array, 'referrer_id');

You can also use array_map and array_values together.

$array = [
    [
        "referrer_id" => "usr157"
    ],
    [
        "referrer_id" => "usr42"
    ]
];

$flatten = array_map(function($item) {
    return array_values($item)[0];
}, $array);

var_dump($flatten);

Also you can use the one-liner if you're using latest version of php that support arrow function

$flatten = array_map(fn($item) => array_values($item)[0], $array);

Or without array_values, you may specify the key

$flatten = array_map(fn($item) => $item['referrer_id'], $array);

You can see the demo here