php substr() function with utf-8 leaves � marks at the end

Question

Here is simple code

Answer 1

If your strings may contain Unicode (multi-byte) characters and you don’t want to break these, replace substr with one of the following two, depending on what you want:

Limit to 142 characters:

mb_substr($var, 0, 142);

Limit to 142 bytes:

mb_strcut($var, 0, 142);