Character filtering in php

Question

PHP

Hello habrazhiteli, please tell me how to filter all graphic characters using php?
(maybe there is a tricky regexp or something else)
For example:

★★•♥ღ•♥ღ۞۞♪ϟ♥╬  ⎳ ◊๑♫╚► ۞

Answer 1

If you need only Russian and English letters, and other symbols,

Answer 2

One of the solutions: run through the string, find and isolate the characters you need by ascii codes using the ord () function.
ascii character table:
www.tcp-ip-info.de/tcp_ip_und_internet/ascii.gif

Answer 3

Use the u modifier and the desired escape sequences from here:
en2.php.net/manual/en/regexp.reference.unicode.php