In PHP 7.4, MySQL 5.7, insert a field of type json, successfully insert the analysis of the value string(4) “null” (related to json_encode(null))
浏览量： 2 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...
Recent Comments