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Q:

PHP extension quicker way to get the _GET variable in C

I am currently working on a PHP extension project and I've encountered a situation where I need to retrieve the _GET variable in C code. I am aware that I can access it using the global $_GET array in PHP, but since my project involves creating a custom extension in C, I need a more efficient solution.

I wanted to know if there is a quicker way to retrieve the _GET variable directly in C code without relying on the PHP global arrays. Is there a specific PHP API function or some other method that I can use to achieve this?

I am looking for any suggestions or insights from experienced PHP extension developers who might have encountered a similar requirement in their projects. Any help or guidance would be greatly appreciated!

All Replies

ellis.abernathy

As User 1:

I faced a similar challenge in one of my PHP extension projects, where I needed to access the _GET variable directly in C code. After some research and experimentation, I found a solution using the PHP C API.

To retrieve the _GET variable, you can make use of the `zend_hash_find` function from the Zend Engine API. The `zend_hash_find` function allows you to search for a specific key in the PHP superglobals, including _GET.

Here's an example of how you can retrieve the value of a specific key from the _GET variable in your PHP extension code:

c
zval *get_array;
zval *param_value;
char *param_name = "some_key"; // Replace this with your desired key

if (Z_TYPE(PG(http_globals)[TRACK_VARS_GET]) != IS_ARRAY) {
return; // Error handling if _GET is not an array
}

get_array = &PG(http_globals)[TRACK_VARS_GET];
if (zend_hash_find(Z_ARRVAL_P(get_array), param_name, strlen(param_name) + 1, (void **)&param_value) == SUCCESS) {
// The parameter exists in _GET, you can access its value using param_value
} else {
// Parameter not found in _GET
}


Make sure to replace `"some_key"` with the desired key you want to retrieve from the _GET variable. Also, handle any error scenarios as needed.

I hope this helps! Let me know if you have any further questions or if there are any other aspects of your PHP extension project that you'd like to discuss.

glen.schneider

As User 2:

In my experience working with PHP extensions and accessing the _GET variable directly in C code, I found an alternative approach that might be more efficient for your project.

Instead of using the `zend_hash_find` function, you can utilize the `PHP_GLOBAL` macro to directly access the value of _GET within your extension code. This macro provides quick access to the global _GET array without the need for additional function calls.

Here's an example of how you can retrieve the value of a specific key from the _GET variable using the `PHP_GLOBAL` macro:

c
zval *get_array = &PG(http_globals)[TRACK_VARS_GET];
char *param_name = "some_key"; // Replace this with your desired key

if (Z_TYPE_P(get_array) == IS_ARRAY) {
zval *param_value = zend_hash_str_find(Z_ARRVAL_P(get_array), param_name, strlen(param_name));

if (param_value != NULL) {
// The parameter exists in _GET, you can access its value using param_value
} else {
// Parameter not found in _GET
}
} else {
return; // Error handling if _GET is not an array
}


Here, the `PHP_GLOBAL` macro allows us to directly access the _GET variable as a zval pointer. We then use the `zend_hash_str_find` function to search for the desired key within the array.

This approach eliminates the need for additional function calls and potential overhead, giving you a more efficient way to retrieve the _GET variable in C code.

If you have any further questions or need assistance with any other aspect of your PHP extension project, feel free to ask. Good luck!

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