Get a word using php regular expression from string

Question

This is my strings

905 Lumens/7.2W/3000K/82CRI/L85 50Khrs
1224 Lumens - 9.6W - 3000K
1632 3000K 12.8W 50Khrs
2448 Lumens/3000K/19.2W 150Khrs

Now I want to get only the word that have number with W Like: 7.2W , 9.6W

I want to get this in a variable using regular expression.

My code is: $watt = preg_match("/[\\d]+W/", $string);

currently my code return with array, but I want only string with 7.2W or 9.6W or similar ..

Please help.

Answer 1

First of all - founded matches are gathered in a third argument $matches .

Second - you need to consider a dot( . ) in your regexp:

preg_match("/(\d+\.\d+W)/", $string, $matches);
print_r($matches);
echo $matches[0];   // full match found

If . is optional - then:

preg_match("/(\d+(\.{0,1})\d+W)/", $string, $matches);
print_r($matches);
echo $matches[0];   // full match found