regex101: PCRE (Legacy) Match Workspace

Regular Expression

(({if \$var})[^}]*})\s*[^{}]*\s*{/if}

New

{if $var}
    {if $var}
        {if $var}  
	     text
		{else}

            text *(&@$@!/\#<?>~`.,+-_
    	
    {if $var}
        any symbols
    {elseif $var}
        text
    {else}        
        {if $var}{/if}
    {/if}
    {if $var}{/if}
{else}
    text and symbols *(&@$$@!
{/if}



(({if \$var})[^}]*})\s*[^{}]*\s*{/if}   // 2450 steps


(?(?=\/.?)|({if \$var}).*?)*(?={\/if})  // 1531 steps

Substitution

{if $var}
    {if $var}
        {if $var}  
	     text
		{else}

            text *(&@$@!/\#<?>~`.,+-_
    	
    {if $var}
        any symbols
    {elseif $var}
        text
    {else}        
        {if $var}{/if}
    {/if}
    {if $var}{/if}
{else}
    text and symbols *(&@$$@!
{/if}



(({if \$var})[^}]*})\s*[^{}]*\s*{/if}   // 2450 steps


(?(?=\/.?)|({if \$var}).*?)*(?={\/if})  // 1531 steps