Can't load custom PHP module

Question

It compiles into a DLL w/o problems. But then it's not being recognized as loaded when I use the extension_loaded function in PHP or look it up in the phpinfo list. I put the DLL into the extensions folder then add it's entry into php.ini. I think the problem may be in the code.

Am I missing something or doing something wrong?

ZEND_FUNCTION(MyFunction) 
{

    char var1 = NULL;
    char var2 = NULL;
    char var3 = NULL;
    char var4 = NULL;
    char var5 = NULL;
    char var6 = NULL;
    int var7;
    double *var8;

    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ssssssla", &var1, &var2,
                                &var3, &var4, &var5, &var6, &var7, &var8) == FAILURE) {
        RETURN_NULL();
    }

    Cfunction(&var1,&var2,&var3,&var4,&var5, &var6, var7, var8);

    RETURN_TRUE;
}

zend_function_entry MyExtension_functions[] = {
    ZEND_FE(MyFunction, NULL)
    {NULL,NULL,NULL}
};


PHP_MINIT_FUNCTION(MyExtension) {
    return SUCCESS;
}

PHP_MSHUTDOWN_FUNCTION(MyExtension) {
    return SUCCESS;
}

PHP_MINFO_FUNCTION(MyExtension) {
    php_info_print_table_start();
    php_info_print_table_header(2, "MyExtension v1.0", "");
    php_info_print_table_row(2, "PHP Extension", "enabled");
    php_info_print_table_end();
} 




zend_module_entry MyExtension_module_entry = {
#if ZEND_MODULE_API_NO >= 20010901
    STANDARD_MODULE_HEADER,
#endif
    "MyExtension",
     MyExtension_functions,
    NULL,
    NULL,
    NULL,
    NULL,
    PHP_MINFO(MyExtension),
    "1.0",
    STANDARD_MODULE_PROPERTIES
};

    ZEND_GET_MODULE(MyExtension)

Did you restart the web server after installing the extension and adding it to php.ini? What error message are you getting? — Timothy
– Timothy, Commented Jul 10, 2013 at 19:31
Yes I restarted the web server. An error message from the server or php? — Bob Blogge
– Bob Blogge, Commented Jul 10, 2013 at 19:33
sure you're modifying the right .ini file? check phpinfo()'s output to see which one you should be changing. — Marc B
– Marc B, Commented Jul 10, 2013 at 19:35
Yes, I'm modifying the right .ini file. I checked phpinfo() to be sure. — Bob Blogge
– Bob Blogge, Commented Jul 10, 2013 at 19:38
enable show_startup_errors in php.ini. Otherwise messages because of faulty extensions will get silenced — hek2mgl
– hek2mgl, Commented Jul 10, 2013 at 19:40

Bob Blogge · Accepted Answer · 2013-07-11 16:28:59Z

The best way to view extension loading errors is to run php.exe from command line. This showed me error messages of

Warning: PHP Startup: MyExtension: Unable to initialize module
Module compiled with module API=20121212
PHP    compiled with module API=20090626
These options need to match
 in Unknown on line 0

So I found the #define ZEND_MODULE_API_NO in zend_modules.h and changed it from 20121212 to 20090626.

Then it complained with:

Warning: PHP Startup: MyExtension: Unable to initialize module
Module compiled with build ID=API20090626,NTS,VC10
PHP    compiled with build ID=API20090626,NTS,VC9
These options need to match
 in Unknown on line 0

So I found #define PHP_COMPILER_ID in config.w32.h and changed it from "VC10" to "VC9".

After this it loaded the module. I was able to call my function but it came back with a tradition 500 error. I suspect this has something to do with the VC9/VC10 incompatibility.

The moral of the story is that I tried to use extension compiled with VC10 when the PHP I was using was compiled with VC9. This leads to all sorts of errors. The appropriate thing to do is then compile PHP src with VC10.

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