如果字符串以这些字符结尾，那么

Question

I have the following string examples:

$text = 'Hello world. '; // true
$text = 'Hello world? '; // true
$text = 'Hello world! '; // true
$text = 'Hello world.   '; // true
$text = 'Hello world.'; // true

$text = 'Hello world '; // false
$text = 'Hello world'; // false
$text = 'Hello world-'; // false

If string ends with . or ? or !, then return true, otherwise, return false.

What's the best approach to this?

Answer 1

You can use substr, rtrim and strpos for this, like this:

$result = strpos("!?.", substr(rtrim($text), -1)) !== false;

This will set $result to true or false as you have indicated.