problem with larger space character

Hello, in the system I developed, I'm having a problem receiving json, when I copy and paste information into the input, and write to the database with a character that is like a single space that is greater than ... I use security: addslashes (mysqli_real_escape_string ($ variable)) That's until it works fine, but it does not remove that "bigger space" character, does anyone else know anything I can do? Or am I going to have to replace this character that disrupts my json?

I tried to put the character here, but here it converts it to a small space.