Technical Details and PHP Developer

updating two tables in a single query in mysql UPDATE  tb1 , tb2  SET  tb1.name= 'new name', tb2.name = 'tb2 name'   WHERE   tb1.id = '1'  AND  tb2.id = '5'

delete record from two table in same time in mysql  it is useful when we create two related table in mysql     // with inner join  DELETE tb1, tb2 FROM tb1 inner JOIN tb2  WHERE tb1.id=tb2.tb1id and tb1.id=1  // with left or Right Join  DELETE tb1, tb2 FROM tb1 LEFT JOIN tb2 ON tb1.id=tb2.tb1id  WHERE tb1.id=1

<?php  class  a {  public  function  f1 (){ echo  'this is a:f1 function' ;   }    function  f3 (){   a :: f1 (); // call here same class method  echo  '<br>Call here f1 function ' ;  } } class  b { function  f2 (){  a :: f3 (); echo  '<br> This is b:f2 function' ; } } $ob = new  b ();  $ob -> f2 (); ?> OutPut: this is a:f1 function Call here f1 function  This is b:f2 function