Regular Expressions 101

{the literal { (123₁₀ / 173₈ / 7B₁₆)

Character Class[a-z]+

+matches at least one character from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

:ce_img:the literal text :ce_img: (case sensitive)

Non-Capturing Group(?:single|pair)?

?repeats the group contents below at most once:

1st Alternativesingle

singlethe literal text single (case sensitive)

2nd Alternativepair

pairthe literal text pair (case sensitive)

Group 1([\w\W\s]+)*

*repeats the group contents below any number of times:

Character Class[\w\W\s]+

+matches at least one character from the set below:

\wany word character

\Wany non-word character

\sany whitespace character

}the literal } (125₁₀ / 175₈ / 7D₁₆)

Global pattern flags

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

{[a-z]+:ce_img:(?:single|pair)?([\w\W\s]+)*}

Test String
New

{eggs:ce_img:single 
   src="{src}"
   fallback_src="/assets/a-b-c.jpg"
   width="250"
   height="250"
   add_dims="no"
   crop="yes"
   title="{title}"
   alt="{title}"
   allow_scale_larger="yes"
}

Substitution
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$1

Regular Expression

Test StringNew

SubstitutionProcessing...

Test String
New

Substitution
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