Re: Extension for str_replace / preg_replace with arrays

On 18 December 2012 13:24, Stefan Neufeind <neufeind@php.net> wrote: > Since we already have functionality for replacing with arrays in place, > I wondered if giving it one string to replace and then an array to > choose the replacement from (rotating) would be an option. Currently > that's "unsupported" (either two strings or two arrays). > It's certainly possible to implement, but personally it feels like odd behaviour. I don't know what other people think about it. > I think you could use a callback-function but would need to add quite a > few more lines to initialise your array first, do a "next()" on the > array inside the callback-function and (how would you pass it that > array?) and still would have to handle starting from beginning of the > array again once you reach the end etc. > You pass the array using "use". You could do it something like this: $replacements = array( 'one', 'two', 'three' ); $result = preg_replace_callback( '/word/', function($matches) use (&$replacements) { $current = current($replacements); next($replacements) || reset($replacements); return $current; }, 'word word word word word' ); var_dump($result); Output: string(21) "one two three one two"