php - Get all matches in a regular expression -


i have url:

uploads/offers/picture/_ytoxontzojc6im9wdglvbnmio3m6mty6inpvb21dcm9wldi4ms_/_wymdaio30=_/518edc82d94b0-201341717250_descuen_a06d000000fkvwpiak_1_1.jpg

and need /_(.*)_/ parts, preg_match_all expression seems bad formed:

preg_match_all('#/_([^_/]+)_/#', $url, $params);

returns

array (     [0] => array         (             [0] => /_ytoxontzojc6im9wdglvbnmio3m6mty6inpvb21dcm9wldi4ms_/         )     [1] => array         (             [0] => ytoxontzojc6im9wdglvbnmio3m6mty6inpvb21dcm9wldi4ms         ) )

and need

array (     [0] => array         (             [0] => /_ytoxontzojc6im9wdglvbnmio3m6mty6inpvb21dcm9wldi4ms_/             [1] => /_wymdaio30=_/         )     [1] => array         (             [0] => ytoxontzojc6im9wdglvbnmio3m6mty6inpvb21dcm9wldi4ms             [1] => wymdaio30=         ) )

some problem common string parts in expression?

one problem current solution matches / @ end of expression explosion pill's answer says; using positive lookahead solve problem.

another possible issue [^_/] part may end breaking regex if input contains underscores part of matches want capture.

to solve both issues @ once:

~/_(.+?)_(?=/)~

this seems me closer after: "whenever see sequence /_ start capturing input until come across sequence _/". lone underscores inside input not break this.


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