In PHP programming, after data is queried through a form, how can the data be displayed? What should I do?

In PHP programming, after data is queried through a form, how can the data be displayed? For example, the form1 form has the ID, age, and sex fields, which correspond to an INPUT text box, enter the ID value, click the query button, and the action is submitted to the PHP processing page (mysql database query ), display the query result and ID field value to the INPUT text box corresponding to the form1 field. how to implement this PHP programming and solve the specific data display method after the form query data?
For example, the form1 form has the ID, age, and sex fields, which correspond to an INPUT text box, enter the ID value, click the query button, and the action is submitted to the PHP processing page (mysql database query ), display the query result and ID field value to the INPUT text box corresponding to the form1 field. how can this display function be implemented? Newbie solving? Urgent! Thank you!
------ Solution --------------------
Input value = "$ row [ID]"
------ Solution --------------------
Assume that the data you query is saved in the row array.
Write in your HTML code like this
" name="age" id="age" />
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