Regular Expressions 101

Explanation
Pro

Group 1(http(s?):)

httpthe literal text http (case sensitive)

Group 2(s?)

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

:the literal : (58₁₀ / 72₈ / 3A₁₆)

Group 3([/|.|\w|\s|-])*

*repeats the group contents below any number of times:

Character Class[/|.|\w|\s|-]

/the literal / (47₁₀ / 57₈ / 2F₁₆)

|the literal | (124₁₀ / 174₈ / 7C₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

\wany word character

|the literal | (124₁₀ / 174₈ / 7C₁₆)

\sany whitespace character

|the literal | (124₁₀ / 174₈ / 7C₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?:jpg|jpeg|gif|png)

1st Alternativejpg

jpgthe literal text jpg (case sensitive)

2nd Alternativejpeg

jpegthe literal text jpeg (case sensitive)

3rd Alternativegif

gifthe literal text gif (case sensitive)

4th Alternativepng

pngthe literal text png (case sensitive)

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.

26 tokens

(http(s?):)([/|.|\w|\s|-])*\.(?:jpg|jpeg|gif|png)

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