regex101: PCRE (Legacy) Match Workspace

(?s)applies the following effective flags to the remainder of the pattern: gms

s modifier: single line. Allows a dot to match line terminators

\ban ASCII word boundary

iPhone:the literal text iPhone: (case sensitive)

\na line-feed (newline) character (ASCII 10)

\n+a line-feed (newline) character (ASCII 10), repeated at least once

Non-Capturing Group(?:(?!\n\n).)+

+repeats the group contents below at least once:

Negative Lookahead(?!\n\n)

\na line-feed (newline) character (ASCII 10)

.any character

\ban ASCII word boundary

Serial Number: the literal text Serial Number: (case sensitive)

Group 1(\w+)

\w+any word character, repeated at least once

Global pattern flags

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

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Search reference

Regular Expression

(?s)\biPhone:\n\n+(?:(?!\n\n).)+\bSerial Number: (\w+)

New

USB:

USB 2.0 SuperSpeed Bus:

  Host Controller Location: Built-in USB

    Internal Memory Card Reader:

      Product ID: 0x8406
      Serial Number: 000000000820 //i dont want this
      Built-In: Yes

USB 3.0 Hi-Speed Bus:

  PCI Device ID: 0x8c31 


    iPhone:

      Vendor ID: 0x05ac  (Apple Inc.)
      Version: 7.02
      Serial Number: wea0aa752ada7722ac92575e98z2e89c691f4282 //i want this
      Speed: Up to 480 Mb/sec
      Manufacturer: Apple Inc.
      Location ID: 0x14100000 / 9

    Apple Internal Keyboard / Trackpad:

      Product ID: 0x0262
      Vendor ID: 0x05ac  (Apple Inc.)
      Location ID: 0x14c00000 / 3
      Current Available (mA): 500
      Current Required (mA): 40
      Built-In: Yes