Regular Expressions 101

All the errors detected are listed below, from left to right, as they appear in the pattern.

(?<= Lookbehind must have a fixed width

" Delimiter must be escaped with `\`

) Lookbehind must have a fixed width

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(?<=href=")(.*?\.(.*?))\\

New

some random text <a href="http://localhost/example/wp-content/uploads/2014/07/Link1.pdf\">Link1</a><a href="http://localhost/example/wp-content/uploads/2014/07/Link2.pdf\">Link2</a>

Regular Expression

Extraction