regex101: PCRE2 (PHP) Substitution Workspace

\ban ASCII word boundary

Group 1(https?://[^\s/]+/documents/)

httpthe literal text http (case sensitive)

s?optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

://the literal text ://

Negated Character Class[^\s/]+

+matches at least one character outside the set below:

\sany whitespace character

/the literal / (47₁₀ / 57₈ / 2F₁₆)

/documents/the literal text /documents/ (case sensitive)

en/the literal text en/ (case sensitive)

Group 2([^\s/]+)

Negated Character Class[^\s/]+

+matches at least one character outside the set below:

\sany whitespace character

/the literal / (47₁₀ / 57₈ / 2F₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

pdfthe literal text pdf (case sensitive)

\ban ASCII word boundary

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Search reference

Regular Expression

\b(https?://[^\s/]+/documents/)en/([^\s/]+)\.pdf\b

New

The problem is, if the page contains a PDF linked to another page (not my own website), example https://othersite.example.com/whatever.pdf, it becomes https://othersite.example.com/whatever_SPANISH.pdf which isn't valid on other people's sites. I want to ignore offsite links and only change URLs on my site.

So what I would like to do is look for the string: https://example.com/documents/en/whateverfilename.pdf and pull that file name out and change it to https://example.com/documents/es/whateverfilename_SPANISH.pdf (Switching the en to es and also appending the _SPANISH to the end of the PDF filename.

Substitution

$1es$2_SPANISH.pdf