php - Converting array to JSON string when array already contains JSON strings -


i have array contains json string.

array (     [0] => array         (             [name] => original             [nutrients] => {"calories":{"value":2500,"operator":2},"protein":{"value":500,"operator":1},"carbs":{"value":200,"operator":0},"fat":{"value":50,"operator":0},"sugar":{"value":1,"operator":2}}         )      [1] => array         (             [name] => rest             [nutrients] => {"calories":{"value":5000,"operator":2},"sugar":{"value":10,"operator":2}}         )  )

i want turn whole array json string

echo json_encode($array);

but throws \ in front of quotes 

[{"name":"original","nutrients":"{\"calories\":{\"value\":2500,\"operator\":2},\"protein\":{\"value\":500,\"operator\":1},\"carbs\":{\"value\":200,\"operator\":0},\"fat\":{\"value\":50,\"operator\":0},\"sugar\":{\"value\":1,\"operator\":2}}"},{"name":"rest","nutrients":"{\"calories\":{\"value\":5000,\"operator\":2},\"sugar\":{\"value\":10,\"operator\":2}}"}]

this problem comes because nutrients value json string.

how can convert array json string when contains json strings, while having no slashes in front of quotes?

use json_decode convert 'nutrients' array.

foreach($array &$a){  $a['nutrients'] = json_decode($a['nutrients']);  }

then 

echo json_encode($array);

-

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