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@ 2022-02-15T18:22:25Z

<?php
function ufirst( $str ) {
                $octetCode = ord( $str );
                // See https://en.wikipedia.org/wiki/ASCII#Printable_characters
                if ( $octetCode < 96 ) {
                        // Assume this is an uppercase/uncased ASCII character
                        return (string)$str;
                } elseif ( $octetCode < 128 ) {
                        // Assume this is a lowercase/uncased ASCII character
                        return ucfirst( $str );
                }

                $first = mb_substr( $str, 0, 1 );
                return ( strlen( $first ) !== 1 )
                        // Assume this is a multibyte character and mb_internal_encoding() is appropriate
                        ? mb_strtoupper( $first ) . mb_substr( $str, 1 )
                        // Assume this is a non-multibyte character and LC_CASE is appropriate
                        : ucfirst( $str );
        }

$str = "ალევის_სამების_მონასტერი.jpg";
$str = ufirst($str);
echo $str;
?>

Output for git.master, git.master_jit, rfc.property-hooks: Ალევის_სამების_მონასტერი.jpg

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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