Inspired by: https://bit.ly/2NaI8oN
If you want to get a temporary dictionary you could use sys_get_temp_dir(). But this doesn’t guarantee that you have write access to this dictionary. So, you can also get the upload_tmp_dir property from the php.ini file.
You can combine this for simplicity in a function:
<?php function get_temp():string{ // Returns a temporary dictionary path. // When it can't find one, it returns false. if(is_writable(sys_get_temp_dir())){ return sys_get_temp_dir(); }elseif(is_writable(ini_get("upload_tmp_dir"))){ return ini_get("upload_tmp_dir"); }else{ return false; } } echo get_temp(); ?> Or the short form:
<?php function get_temp():string|bool{ return is_writable(sys_get_temp_dir())?sys_get_temp_dir():(is_writable(ini_get("upload_tmp_dir"))?ini_get("upload_tmp_dir"):false); } ?> 
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