    header_remove (PHP 5 >= 5.3.0, PHP 7, PHP 8)
header_remove — Remove previously set headers   Description header_remove(?string $name = null): void  Removes an HTTP header previously set using header().    Parameters
  name
   The header name to be removed. When null, all previously set headers are removed.  Note:  This parameter is case-insensitive.       Return Values  No value is returned.    Changelog    Version Description     8.0.0  name is nullable now.       Examples
 Example #1 Unsetting specific header.  <?php
header("X-Foo: Bar");
header("X-Bar: Baz");
header_remove("X-Foo"); 
?>  The above example will output something similar to:  
X-Bar: Baz
    Example #2 Unsetting all previously set headers.  <?php
header("X-Foo: Bar");
header("X-Bar: Baz");
header_remove(); 
?>  The above example will output something similar to:    Notes 
Caution  This function will remove all headers set by PHP, including cookies, session and the X-Powered-By headers.   
Note: 
 Headers will only be accessible and output when a SAPI that supports them is in use.     See Also
 header() - Send a raw HTTP header headers_sent() - Checks if or where headers have been sent   


    
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