How to use php to control the selected values in the select statement

How can I use php to control the selected values in the select statement? For example, I have a select form & lt; select & nbsp; name = "select_1" & gt; & lt; option & nbsp; value = "" & gt; & lt; /option & gt; & lt; option & nbsp; value = "value_1" & gt; how to use php to control the selected values in the select statement?
For example, I have a select form.

 
  

  
   

   
    option_1
    

    
     option_2
     
.....
     

     
      option_n
      

      

     
    
   
  
 

The last n may be very large. my design is to save the user form submitted to mysql, and then the user can edit it. on the editing page, this single-choice form must be displayed as a mysql value in the selected status. I have read the value in mysql $ value_select_1. how can I use php to control this select_1 form and select the value of $ value_select_1?

Soon after learning php, I hope I will not be enlightened. Share: More