php - Yet another regex. Getting image from markdown, bugged if markdown inside -

i'm trying images info wiki, have working regex i'm failing when description has markdown also.

format of images on markdown:

//[[image:williamgodwin.jpg|thumb|right|150px|william godwin]] //[[image:johannmost.jpg|left|150px|thumb|[[johann most]] outspoken advocate of violence]] //[[image:cnt-armoured-car-factory.jpg|right|thumb|270px|[[spain]], [[1936]]. members of [[cnt]] construct [[armoured car]]s fight against [[fascist]]s in 1 of [[collectivisation|collectivised]] factories.]] [[image:cnt_tu_votar_y_ellos_deciden.jpg|thumb|175px|cnt propaganda april 2004.  reads: don't let politicians rule our lives/ vote , decide/ don't allow it/ unity, action, self-management.]] [[image:flag of anarcho syndicalism.svg|thumb|175px|the red-and-black flag, coming experience of anarchists in labour movement, particularly associated anarcho-syndicalism.]] [[image:leotolstoy.jpg|thumb|150px|[[leo tolstoy|leo tolstoy]] 1828-1910]] 

{{main articles|[[christian anarchism]] , [[anarchism , religion]]}}

here's tries: https://regex101.com/r/pd6nf8/1

i'm trying like:

// \[\[image:(.*?)\|(.*?)\|(.*?)\|(.*?)\|\[*(.*?)\|*(.*?)\]* $re = "/\\[\\[image:(.*?)\\|(.*?)\\|(.*?)\\|(.*?)\\|\\[*(.*?)\\|*(.*?)\\]*/i";  

it should find 14 test i'm getting 11 far, or if 14 noise ]] or parts of description...

how can include optional case of having [[(.*?)]] inside last part?

you can define nested parts before, using kind of syntax:

$pattern = '~ # definitions (?(define)      (?<nested> \[\[ [^][]*+ (?:\[\[ \g<nested> ]] [^][]*)*+ ]] )      (?<part>   [^][|]*+ (?: \g<nested> [^][|]* )*+             ) ) # main pattern \[\[ image: (\g<part>) \| (\g<part>) \| (\g<part>) \| (\g<part>) \| (\g<part>) ]] ~ix'; 

demo

obviously, can more precise. if know 4th part size, can replace it:

\[\[ image: (\g<part>) \| (\g<part>) \| (\g<part>) \| (\d+ px) \| (\g<part>) ]] 

you free make part optional if needed (for example alignment parameter can omitted):

\[\[ image: (\g<part>) \| (\g<part>) (?:\| (\g<part>) )? \| (\d+ px) \| (\g<part>) ]] 

or can parameters optional , can occur once, in case need precise:

~ (?(define)      (?<nested> \[\[ [^][]*+ (?: \[\[ \g<nested> ]] [^][]* )*+ ]] )      (?<part>   [^][|]*+ (?: \g<nested> [^][|]* )*+               ) )  \[\[image: (?<name> [^]|]* ) (?:    \|     (?: (?<align>       left|right|center ) |        (?<type>        thumb             ) |        (?<size>        \d+[a-z]{0,3}     ) |        (?<description> \g<part>          )    ) )* ]] ~ix 

demo