正则表达式/ PHP在第一个字母之前删除所有内容

Question

I need to remove all characters before the first letter... How do I search for the position of the first occurance of [a-z] & [A-Z].

$test = "1234 123423-34 This is a test";

$string = preg_replace('/REGEX/', "", $test);
echo $string;

Should output: This is a test

Answer 1

Use a negated character class with a leading anchor.

^[^A-Za-z]+

Regex Demo: https://regex101.com/r/149aDt/1

PHP Demo: https://3v4l.org/7m6RZ

$test = "1234 123423-34 This is a test";
echo preg_replace('/^[^A-Za-z]+/', '', $test);