php - Replace an upper-case string with lower-case using preg_replace() and regex -


is possible replace upper-case lower-case using preg_replace , regex?

for example:

the following string:

$x="hello ladies!";

i want convert to:

 hello ladies!

using preg_replace():

 echo preg_replace("/([a-z]+)/","$1",$x);

i think trying accomplish:

$x="hello ladies! test"; echo preg_replace_callback('/\b([a-z]+)\b/', function ($word) {       return strtolower($word[1]);       }, $x);

output:

hello ladies! test

regex101 demo: https://regex101.com/r/td7si0/1

if want whole string lowercase though use strtolower on whole thing.


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