^start of line
.*?any character (except for line terminators), repeated any number of times
\ban ASCII word boundary
uk_enthe literal text uk_en (case sensitive) \ban ASCII word boundary
.*?any character (except for line terminators), repeated any number of times
\ban ASCII word boundary
needlethe literal text needle (case sensitive) \ban ASCII word boundary
.*?any character (except for line terminators), repeated any number of times
$end of line
m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string