Regular Expressions 101

Explanation

Pro

{ifthe literal text {if (case sensitive)

Condition(?(?={\/?if)|.)*

*repeats the group contents below any number of times:

Uses the first branch if the lookaround matches

Positive Lookahead(?={\/?if)

{the literal { (123₁₀ / 173₈ / 7B₁₆)

\/?optionally matches the literal / (47₁₀ / 57₈ / 2F₁₆)

ifthe literal text if (case sensitive)

If the condition is true, match this branch: — matches an empty string

Otherwise, match this branch:.

.any character

Positive Lookahead(?={\/if})

{the literal { (123₁₀ / 173₈ / 7B₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

if}the literal text if} (case sensitive)

Global pattern flags

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

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

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

{if(?(?={\/?if)|.)*(?={\/if})

New

{if $var1}
        {if $var2}
                {if $var3}{/if}
        {/if}
        {if $var4}

        {elseif $var5}

        {else}
                {if $var6}{/if}
        {/if}

        {if $var7}{/if}

{else}

{/if}

Extraction

{if $var1}
        {if $var2}
                {if $var3}{/if}
        {/if}
        {if $var4}

        {elseif $var5}

        {else}
                {if $var6}{/if}
        {/if}

        {if $var7}{/if}

{else}

{/if}