Tag: json_encode(null)
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Post Views: 17 1. In the MySQL table, the field type is JSON, and it is allowed to be null. as shown in Figure 1 2. Since only is_null() is judged in the program, if it is not null, the default is json format. When its value is String(4) “NULL”, the program throws a 500 exception. Displayed as null, indicating…
