php string validation for basiclatin and 1supplement

问题

I have an xml schema where a description is defined like this:

[\p{IsBasicLatin}\p{IsLatin-1Supplement}]{1,1000}

and i have to check in PHP that the user input string is valid for this encoding. Checking for the length is easy, but i don't find a way to use preg_match to check for basic latin. I've tried:

 preg_match('@^\p{IsBasicLatin}+@^\p{IsLatin-1Supplement}+$@u', $string);

but it says that there's an unknown property, even using basicLatin or Latin.

回答1:

The pattern \p{IsBasicLatin} stands for [\x00-\x7F] and \p{IsLatin-1Supplement} stands for [\x80-\xFF] (see Unicode reference).

Thus, all you need is

preg_match('~^[\x00-\xFF]{1,1000}$~u', $s)

See the PHP demo.

回答2:

This is quite simple. Just check for the existence of either string:

<?php

$regex = '#(IsBasicLatin|IsLatin)#';
$string = '[\p{IsBasicLatin}\p{IsLatin-1Supplement}]{1,1000}';

if (preg_match($regex, $string)) {
    echo 'Lorem Ipsum Shipmsum flipsum';
}

Lorem Ipsum Shipmsum flipsum

See it here https://3v4l.org/P9RDu

Play with the regex here https://regex101.com/r/p56prj/1

来源：https://stackoverflow.com/questions/53043409/php-string-validation-for-basiclatin-and-1supplement