| Hacking the PHP Source |
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2024-11-24 |
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17 |
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Generally the extension-wide global variables are actually configuration
options set in the php.ini file, or perhaps in the Apache httpd.conf file.
Adding such configuration options for your extension is easy. To add a
test.my_ini_setting configuration variable, first
follow the instructions for creating a global variable from the last slide.
Then in your .c file add:
The arguments to STD_PHP_INI_ENTRY here are:
- • entry name
- • entry value
- • change permissions
- • pointer to change notification handler
- • corresponding global variable
- • globals struct type
- • globals struct
You can implement your own change notification handlers using
PHP_INI_MH(), but here we will just
use the default OnUpdateInt which
basically just takes the string in the .ini file and does an atoi()
on it. The other built-in handlers are
OnUpdateReal(),
OnUpdateBool(),
OnUpdateString(), and
OnUpdateStringUnempty().
After adding your STD_PHP_INI_ENTRY block to your .c file, in your MINIT function
after the ZEND_INIT_MODULE_GLOBALS() add this:
And likewise, in your MSHUTDOWN function add:
And finally, you can optionally add this to your MINFO function:
