php - SQL ID value auto move up -

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I have a table that is an auto-inferit ID column. I want my database to automatically update the ID value To be changed, so that always have an ID value of 1. For example: 

  id first name last name 1 John Smith 2 Charlie Jacobs 3 Jason Young   
 I want it so much that if I enter the line ID 1 If I remove it, then I changed the ID in ID1 and ID 2 to ID id 2. This way:  
  ID Firstname Last Name 1 Charlie Jacobs 2 Jason Young   
 I would like to add a name followed by ID3. Preferably I was wondering if there was any setting in SQL which could do this automatically, if this is not possible then a PHP script would be the second best thing.   
 
 
 This is not the right thing to do. Why do you want to do this? If this corrupts your primary key values ​​then do not do it so come for the solution  
 If you are displaying it within a form, then just select one line number for each row in your selection statement Create There will be no difference between this  
  SELECT @row_number: = @ row_number + 1 as the line_number, db_names from mysql_testing, (SELECT @row_number: = 0) as db_names by command;

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