[PHP] Will my script run after redirect?

[Carfield Yim]

If I have code like: 

if( $i == 0) 
{ 
    print "<meta http-equiv=refresh content=\"0;url=$url\">"; 
} 
$i++; 
  
I find that $i++ will run but I hope it don't, if I alter the code to:

if( $i == 0) 
{ 
    print "<meta http-equiv=refresh content=\"0;url=$url\">"; 
    exit;
} 
$i++; 
  
Will it work? Is it have any side-effect?

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