Regular Expressions 101

<!--{ifthe literal text <!--{if (case sensitive)

Group 1(\s+\(?(\$[^\s!=><}]+)[^}]+)

\s+any whitespace character, repeated at least once

\(?optionally matches the literal ( (40₁₀ / 50₈ / 28₁₆)

Group 2(\$[^\s!=><}]+)

\$the literal $ (36₁₀ / 44₈ / 24₁₆)

Negated Character Class[^\s!=><}]+

+matches at least one character outside the set below:

\sany whitespace character

!the literal ! (33₁₀ / 41₈ / 21₁₆)

=the literal = (61₁₀ / 75₈ / 3D₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

}the literal } (125₁₀ / 175₈ / 7D₁₆)

Negated Character Class[^}]+

+matches at least one character outside the set below:

}the literal } (125₁₀ / 175₈ / 7D₁₆)

}-->the literal text }-->

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

<!--{if(\s+\(?(\$[^\s!=><}]+)[^}]+)}-->

Test String
New

<!--{if $projectdisplaymode != 'Widget'}-->
<!--{if (isset($projectdisplaymode ) && $projectdisplaymode != 'Widget' )}-->
<!--{if $runnow == 'true'}-->
<!--{if (isset($runnow ) && $runnow == 'true' )}-->
<!--{if $showdelete == 'Yes'}-->
<!--{if $average_rating_colorclass == 'progress0'}-->
<!--{if ($percentage!="")}-->

--Find: <!--{if(\s+\(?(\$[^\s!=><}]+)[^}]+)}-->
--Replace: <!--{if (isset($2) && $1)}-->

Regular Expression

Test StringNew

Test String
New