php - Get first character of UTF-8 string

Question

posted Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

I get an UTF-8 string from db, and trying to echo its first character:

$title = $model->title;
echo $title[0];

I get: ?

What's wrong?

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1 Reply

深蓝 · Answer 1 · 2021-10-23T19:27:30+0000

$first_char = mb_substr($title, 0, 1);

You need to use PHP's multibyte string functions to properly handle Unicode strings:

You'll also need to specify the character encoding in the <head> of your HTML:

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />

or:

<meta http-equiv="Content-Type" content="text/html; charset=UTF-16" />