php - Group words in string with count using function -


i need in getting count of array in string.

i have array 5 words :

$array_planet = array('[sun]', '[moon]', '[mercury]', '[venus]', '[mars]');

and i've many strings :

$string_source = 'blabla[sun][sun]blabla[moon][moon][moon]blabla[sun][sun][sun][sun]blabla[venus]';

i need function return :

$string_out = 'blabla[sun][2]blabla[moon][3]blabla[sun][4]blabla[venus][1]';

blabla can length , values.

just use preg_replace_callback(): 

$string_source = preg_replace_callback('/(\[[^\[\]]+\])+/', function($matches) {    return $matches[1].'['.(strlen($matches[0])/strlen($matches[1])).']'; }, $string_source);

note, not rely on planets array because regex replace don't need it.

fiddle available here


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