header_remove()

(PHP 5 >= 5.3.0, PHP 7)

删除之前设置的 HTTP 头

说明

header_remove([string $name]): void

删除之前用header()设置的 HTTP 头。

参数

$name

要移除的头名称。

Note:参数不分大小写。

返回值

没有返回值。

范例

取消指定的头

<?php
header("X-Foo: Bar");
header("X-Bar: Baz");
header_remove("X-Foo"); 
?>

以上例程的输出类似于：

X-Bar: Baz

取消之前全部指定的头

<?php
header("X-Foo: Bar");
header("X-Bar: Baz");
header_remove(); 
?>

以上例程的输出类似于：

注释

本函数会删除所有PHP 设置的头，包括 Cookie、Session 和X-Powered-By。

Note:

数据头只会在SAPI支持时得到处理和输出。

参见

• header() 发送原生 HTTP 头
• headers_sent() 检测 HTTP 头是否已经发送

if you want to remove header information about php version (x-powered-by), you can use:
header_remove('x-powered-by');
alternatively, if you don't have php 5.3 installed, you can do the same thing using "header" command:
header('x-powered-by:');
don't forget the ':' character at the end of the string!

expose_php is php.ini only!
this won't work:
ini_set('expose_php',0);
works:
header_remove('x-powered-by');

When called from a command-line process, this function does nothing when passed a specific header to remove, but it does nonetheless work properly when called with no arguments to remove all headers.
Thus, when unit-testing or executing in some other test harness, if the code you are testing may call `header_remove()`, with the UOPZ and XDebug extensions loaded, you could use the following in order to more effectively test that the expected headers are set [which you would do by inspecting the array returned by `xdebug_get_headers()` after running the code under test, as `headers_list()` does not work despite the headers actually being stored internally as normal]:
<?php
uopz_set_return(
 'header_remove',
 function($name = null) {
  if ($name !== null) {
   $pattern = '/^' . preg_quote($name, '/') . ':/i';
   $headers = array_filter(
    xdebug_get_headers(),
    function($header) use($pattern) {
     return !preg_match($pattern, $header);
    }
   );
  }
  // This works to remove all headers, just not individual headers.
  header_remove();
  if ($name !== null) {
   foreach ($headers as $header) {
    header($header);
   }
  }
 },
 true
);
?>

You should ini_set("expose_php", 0); or set it in your php.ini to Off, instead of using this to remove X-Powered-By header.