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<?php
 
$str = 'DeviceLocation[West12]';
if (preg_match('/\[([A-Za-z0-9!#~?=-]*)]/', $str, $m)) {
	print_r($m); 
}

Success #stdin #stdout 0.01s 52488KB

stdin

Standard input is empty

stdout

Array
(
    [0] => [West12]
    [1] => West12
)

https://ideone.com/8L3naA

language:

PHP (php 7.3.5)

created:

visibility:

secret

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