Regular Expressions 101

1st Alternative.*Date Ordered:\s*(\d{1,2}/\d{1,2}/\d{4}).*

.*any character (except for line terminators), repeated any number of times

Date Ordered:the literal text Date Ordered: (case sensitive)

\s*any whitespace character, repeated any number of times

Group 1(\d{1,2}/\d{1,2}/\d{4})

\d{1,2}a digit, repeated between 1 and 2 times

/the literal / (47₁₀ / 57₈ / 2F₁₆)

\d{1,2}a digit, repeated between 1 and 2 times

/the literal / (47₁₀ / 57₈ / 2F₁₆)

\d{4}a digit, repeated exactly 4 times

.*any character (except for line terminators), repeated any number of times

2nd Alternative.*

.*any character (except for line terminators), repeated any number of times

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

.*Date Ordered:\s*(\d{1,2}/\d{1,2}/\d{4}).*|.*

New

Blah Blah Date Ordered: 5/19/2000 test is positive. Date Ordered: 4/2/2005 Additional testing negative.
Meh Date Ordered: 4/15/1999
irrelevant
--------------Date Ordered: 4/12/3456

Substitution

\1