ini_set('upload_max_filesize','8M');
在PHP脚本中？这是php.ini directives的列表,但是我无法真正弄清楚如何在进行检查之前更改该值.
ini_set将成功返回旧值,失败时为false *.有了这个知识,你可以写一个语句来检查你的呼叫是否经过,如下所示.
$result = ini_set ("some_option","some_value");
$failure = (version_compare(PHP_VERSION,'5.3.0') >= 0) ? false : '';
if ($result === $failure)
echo "Unable to use ini_set to change 'some_option'!";
(*)：注意PHP 5.3.0中的返回值从“(空字符串)更改为false.所以你需要检查你当前的PHP版本.
另一种方法是使用ini_get_all,它将为您提供有关每个可用选项的详细信息,它是access level.
$all_option_details = ini_get_all (); /* see the comments in this post regarding PHP_INI_USER vs INI_USER * seems like someone writing the relevant PHP documentation fcuked up * * props to @soulmerge */ if ($all_option_details['upload_max_filesize']['access'] & INI_USER) echo "we are allowed to change upload_max_filesize from with ini_set!";
我想禁用使用ini_set一些选项,怎么样？
有几种使选项不可更改的运行时(以某种方式禁用ini_set)的方法,其中包括以下两种方法,您可以在提供的链接中阅读更多信息.
> PHP: How to change configuration settings
PHP_admin_value name value
Sets the value of the specified directive. This can not be used in .htaccess files. Any directive type set with PHP_admin_value can not be overridden by .htaccess or ini_set(). To clear a prevIoUsly set value use none as the value.
PHP_admin_flag name on|off
Used to set a boolean configuration directive. This can not be used in .htaccess files. Any directive type set with PHP_admin_flag can not be overridden by .htaccess or ini_set().
示例(摘自this文档)
<IfModule mod_PHP5.c> PHP_value include_path ".:/usr/local/lib/PHP" PHP_admin_flag engine on </IfModule> <IfModule mod_PHP4.c> PHP_value include_path ".:/usr/local/lib/PHP" PHP_admin_flag engine on </IfModule>
