https://learnku.com/php/t/43336 https://github.com/soul11201/php-core-hack https://www.kancloud.cn/kancloud/php-internals/42741

https://www.php.net/manual/zh/function.sys-get-temp-dir.php https://github.com/php/php-src/blob/af6c11c5f060870d052a2b765dc634d9e47d0f18/main/php_open_temporary_file.c#L238