PHP header location function not called

There can be various reasons why Header location function is not executed when called from a php file. Here is a check-list to solve such a issue when encountered.

1. Check that there are no print,echo\'s outputs before the header is being called.

2. There should be no white spaces before <?php and after ?>.

3. Check for UTF-8 BOM(Byte-Order-Mark)

4. There should be no error messages before the header call.

5. If there are include functions calling other php files before header call, 
   check all above steps(about points 1 to 4) for these files.

⚠️ If still the error is not resolved, one of the solution is to enclose you php file with ob_start() and ob_end_flush().

Example:

<?php
  ob_start();
  // your code goes in here
 ob_end_flush();
?>