If you are using mod_gzip or mod_deflate to compress HTML output, you're not able to send partial file to the browser....
To disable mod_deflate in PHP (if needed), you can tell Apache with this :
apache_setenv('no-gzip', '1');
(PHP 4 >= 4.2.0, PHP 5, PHP 7)
apache_setenv — 设置 Apache 子进程环境变量
$variable
, string $value
[, bool $walk_to_top = false
] ) : bool
apache_setenv() 设置由variable指定的 Apache
环境变量值。
Note:
当设置了某 Apache 环境变量, 相应的 $_SERVER 变量不会改变。
variable将被设置的环境变量。
value
新 variable 值。
walk_to_top是否将所设置的顶层变量应用到所有 Apache 层。
成功时返回 TRUE， 或者在失败时返回 FALSE。
Example #1 使用 apache_setenv() 设置一个 Apache 环境变量
<?php
apache_setenv("EXAMPLE_VAR", "Example Value");
?>
Note:
apache_setenv() 可与 apache_getenv() 配合使用，以在不同页面间传递变量，或将 PHP 脚本中已设置变量传入 Server Side Includes (.shtml)页面。
If you are using mod_gzip or mod_deflate to compress HTML output, you're not able to send partial file to the browser....
To disable mod_deflate in PHP (if needed), you can tell Apache with this :
apache_setenv('no-gzip', '1');
When you need to set the QUERY_STRING variable into a page included with the "virtual" function do this:
virtual ("some_page.shtml?$QUERY_STRING");
apache_setenv does not work for this case.
If you set a variable, either new or existing, the corresponding $_SERVER variable is not changed, and you will have to change it as well.
When you want to set variables to pass to Server Side Includes (.shtml) included in PHP scripts, use this.