array_map inline anonymous function

PhpArray Map

Php Problem Overview

I tested inline anonymous function with array_map here

and it worked but when I tried same with $user_meta it is not working.

$user_meta = Array ( [interest] => Array ( [0] => Array ) [type] => 
     Array ( [0] => Array ) [user_status] => Array ( [0] => deny)
     [firstname] => Array ( [0] => ) [lastname] => Array ( [0] => B ) 
     [email] => email@cc.com ) 

$user_meta = array_map(function($a) { return $a[0]; },$user_meta);

> "Parse error: syntax error, unexpected T_FUNCTION, expecting ')' in"

here is the test link showing error

Php Solutions

Solution 1 - Php

I hope this will help:

$user_meta = array_map(function ($a) { return $a[0]; }, $user_meta);

Solution 2 - Php

There's nothing wrong with the array_map line, but everything before it is wrong. That is the output of a print_r not PHP code. Compare how you define the array in the two links you posted.

Solution 3 - Php

That's not an answer to your question, but since you want to return the first key of each sub-array, you can just use array_column.

$user_meta = array_column($user_meta, 0);

Solution 4 - Php

Slightly shorter could be

$user_meta = array_map(fn ($a) => $a[0], $user_meta);

But I would prefer the array_column approach for such an array_map

Categories
Recommended Php Solutions
Recommended Array Map Solutions

Previous Solution:

How to close all active bootstrap modals on session timeout?

JavascriptJqueryTwitter BootstrapModal Dialog

Next Solution:

Menu Items are not showing on Action Bar

AndroidAndroid Actionbar

Attributions

All content for this solution is sourced from the original question on Stackoverflow.

The content on this page is licensed under the Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) license.

Content TypeOriginal AuthorOriginal Content on Stackoverflow
QuestionB L PraveenView Question on Stackoverflow
Solution 1 - PhpDat TTView Answer on Stackoverflow
Solution 2 - PhpPaulView Answer on Stackoverflow
Solution 3 - PhpHichem BenaliView Answer on Stackoverflow
Solution 4 - PhpIgbanamView Answer on Stackoverflow