php - Howto preg_replace a specific symbol within parentheses? -


i got bunch of strings one:

(50 μg/ml); (10, 20, 30, 40, 50, 60 μg/ml) (sub-diploid dna fraction) (p<0.05)   

what want php replace "<" in last parentheses like:

(p&#60;0.05)   

i got tired , frustrated googling please me out that. need php preg replace function finds less , greater symbols within parenthesis of string , replace it's ascii code.

hope work.

$str="p&#60;0.05";  $s1=html_entity_decode(str_replace("<", "&#60;", $str)); echo $s1; 

or

$s1 = html_entity_decode($str);