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<?php
 
$re = "/\\b([0-9]+)(ml|kg|g|l)\\b/"; 
$str = "540ml"; 
 
preg_match($re, $str, $matches);
print_r($matches);

Success #stdin #stdout 0.03s 52432KB

stdin

Standard input is empty

stdout

Array
(
    [0] => 540ml
    [1] => 540
    [2] => ml
)

https://ideone.com/Cgi4SA

language:

PHP (php 7.3.5)

created:

visibility:

secret

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