Command line JSON tool under Linux: JQ

Yum Install Jq-y

Prerequisites JSON:
{"PHP": [{"Name": "A1", "Age": 15},{"Name": "A2", "Age": +}], "Python": [{"Name": "B1", "Age": 15},{"name": "B2", "Age": 18} ]}

Case 1: Formatting the JSON
PHP test.php |JQ.

Case 2: Take out a key all
PHP test.php |jq. php

Case 3: Remove all keys from a key
PHP test.php |jq. PHP|JQ keys
Or
PHP test.php |jq. PHP[1]|JQ keys

Case 5: Determine if a key exists:
PHP test.php |jq. Php[1]|jq ' Have ("age") '

Case 6: Remove a key from a field all
PHP test.php |jq. python[].age
Or
PHP test.php |jq '. php[]| {Age,name} '

Case 7: Customizing out certain fields
PHP test.php |jq '. python[1]| {Age,name} '

Case 8: Remove a key from a field
PHP test.php |jq '. Python[].age '

Official manual: https://stedolan.github.io/jq/manual/

Command line JSON tool under Linux: JQ