(php) Anonymous functions without {} block not highlighted correctly

Describe the issue Highlighter seems to expect a title in PHP arrow functions, even though they are intentionally anonymous.

Which language seems to have the issue? php

Sample Code to Reproduce

<?php
$fn1 = fn($x) => $x + $y;

Expected behavior

Additional context Found in an Code-Golf answer, but also reproduces in the ungolfed version:

fn( $s ) => 
    ( $l = strlen( $s ) ) > 1 ?             // is input longer than one char?
        max( count_chars( $s ) ) > 1 ?      // has more than 1 of any single char?
            'Bunny'                         // if so, contains dupes so... Bunny it is
        :                                   // else, no dupes
            [
                'T' => [ 'Ka',  'Hu'  ],    // two dimensional associative
                'C' => [ 'Rai', 'Do'  ],    //   array containing handsign 
                'J' => [ 'Hyo',  'Sui' ]    //   and length as indexes
            ]
            [ $s[-1] ]                      // access array by last letter and
            [ $l % 2 ]                      //   length mod 2 (2 == 0, 3 == 1)
            . 'ton'                         //   and append "ton"
    :                                       // finally...
    'Fuma Shuriken'                         // input length was only one char

The comments are colored orange because they are considered title.

[joshgoebel]

Oh, title will match it… so you’d just need a special case rule inside contains to explicitly handle use and mark it as a keyword… I’m assuming use is not a valid function name.

Perhaps:

 contains: [
   { beginKeywords: "use" },
   hljs.UNDERSCORE_TITLE_MODE,

[il3ven]

Oh, title will match it… so you’d just need a special case rule inside contains to explicitly handle use and mark it as a keyword… I’m assuming use is not a valid function name.

This does it.