加载我构建的PHP模块失败，没有错误

Question

I built my hello_world php module by following tihs: https://zando.io/post/hello-world-php-7-extension/

And I successfully built a hello.so under modules/

But when I tried to load this hello.so, it failed.

(adding extension=hello.so to php.ini and put the .so file to extension_dir)

var_dump(extension_loaded('hello'));
var_dump(hello_world());

Output:

bool(false)
Fatal error: Uncaught Error: Call to undefined function hello_world() in /var/www/app/test.php(2) : eval()'d code:1 Stack trace: #0 /var/www/app/test.php(2): eval() #1 {main} thrown in /var/www/app/test.php(2) : eval()'d code on line 1

But when I tried to load my friend's hello_world so file, it works!!

(same source code, same building process...)

I really don't know why...

Answer 1

I have solved this problem.

Because I use the wrong version of phpize and php-config.

The phpinfo() shows that PHPAPI is 20170718

But my original phpize shows 20180731

So I reinstall the php7.2-dev.

Then run phpize7.2 and then ./configure --with-php-config=/usr/bin/php-config7.2 to configure the settings.

And it works!