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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 protected] )
$user_meta = array_map(function($a) { return $a[0]; },$user_meta);
"Parse error: syntax error, unexpected T_FUNCTION, expecting ')' in"
here is the test link showing error
343
The array_map() is an inbuilt function in PHP and it helps to modify all elements one or more arrays according to some user-defined condition in an easy manner. It basically, sends each of the elements of an array to a user-defined function and returns an array with new values as modified by that function.
The returned array will preserve the keys of the array argument if and only if exactly one array is passed. If more than one array is passed, the returned array will have sequential integer keys.
To create a new array from an existing PHP array, you can use the array_map(functionName, array1, array2, ...) function. The array_map() function iterates over all the elements of an array and returns a new array containing the results of applying the given callback function to the array elements.
The Ds\Map::map() function of the Map class in PHP is used to apply a callback function to a Map object. This returns the result of applying the callback function to each value present on the map.
I hope this will help:
$user_meta = array_map(function ($a) { return $a[0]; }, $user_meta);
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.
37
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
6
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