[bug] strrev destroys smiley input

[remco-pc]

Description

The following code:

<?php

$name = 👌
$name = strrev($name);
echo $name; //����

Resulted in this output:

����

But I expected this output instead:

👌 or inverse codepoints

PHP Version

8.2.26

Operating System

Debian 12

[NattyNarwhal]

I was about to ask if mb_strrev works for you, except we don't have that one. Good opportunity for a feature request!

The problem is strrev looks at each byte, but not each multibyte character UTF-8 has. Of course, even character reverse is pretty weird for emoji because of ZWJs meaning meaning multiple characters (i.e. 👌 plus a skin tone modifier) become one grapheme.

[kamil-tekiela]

It works as intended. strrev works on a byte-string. It reverses all bytes in a string. Your Unicode character is composed of 4 bytes so it works correctly. If you are missing the functionality of mb_strrev then you could request that as a feature, but it can be easily done in userland already https://3v4l.org/piYNQ

[remco-pc]

@kamil-tekiela thanks for the usable example to get smiley function names (code points) working

[kamil-tekiela]

@remco-pc You are welcome, but please pay attention to what @NattyNarwhal said. What I showed works only with some emojis. Many emojis are actually a combination of 2 or more code points. If you reverse them, the emoji will break.

[youkidearitai]

If exists mb_strrev function, some words(include emoji) breaks. For example, 邉󠄀 (U+9089 U+E0100) is break mb_strrev function because Unicode code points unit.
In other hands, grapheme cluster function solve this issue. So maybe names grapheme_strrev. @remco-pc , if you want to strrev for emoji and more, I can suggest grapheme_strrev function to PHP internals. What do you think?

[remco-pc]

command:

app raxon/parse compile -source=/mnt/Vps3/Mount/Package/Raxon/Parse/Test/Tpl/101-200/Smiley.Boot.3.tpl -options=1 --flags=2 -duration

template

{{👌🤣('⛳', app.flags(), app.options())}}

trait

<?php
/**
 * @package Plugin\Modifier
 * @author Remco van der Velde
 * @since 2024-08-19
 * @license MIT
 * @version 1.0
 * @changeLog
 *    - all
 */
namespace Plugin;

use Raxon\App as Framework;

trait CodePoint_128076_129315 {

    /**
     * @throws Exception
     */
    protected function codepoint_128076_129315($type='', $flags, $options)
    {
        d($type);
        d($flags);
        d($options);
    }
}

works like a charm and if you make all code points available like i did !
Look at the options you create with 1.000.000 * 1.000.000 possibilities with only 2 visible chars.
With constants you could make the quotes disappear.
I need to make a test of your (chinese char) @youkidearitai ? since i cannot read symbols (tried egyptians in the valley of kings)

{
    "class": "mnt_Vps3_Mount_Package_Raxon_Parse_Test_Tpl_101_200_Smiley_Boot_3_tpl",
    "namespace": "Package\\Raxon\\Parse",
    "duration": {
        "require": "1.29 ms",
        "parse": "0.1 ms",
        "total": "147.86 ms",
        "finish": "2025-01-16 00:19:40.7987"
    }
}
/tmp/raxon/org/61c0681b-70d5-4a76-88b9-4a6f2cdcbf00/0/Class/_mnt_Vps3_Mount_Source_Plugin_CodePoint_128076_129315.php:22
string(3) "⛳"
/tmp/raxon/org/61c0681b-70d5-4a76-88b9-4a6f2cdcbf00/0/Class/_mnt_Vps3_Mount_Source_Plugin_CodePoint_128076_129315.php:23
object(stdClass)#731 (1) {
  ["flags"]=>
  int(2)
}
/tmp/raxon/org/61c0681b-70d5-4a76-88b9-4a6f2cdcbf00/0/Class/_mnt_Vps3_Mount_Source_Plugin_CodePoint_128076_129315.php:24
object(stdClass)#729 (7) {
  ["source"]=>
  string(70) "/mnt/Vps3/Mount/Package/Raxon/Parse/Test/Tpl/101-200/Smiley.Boot.3.tpl"
  ["options"]=>
  int(1)
  ["duration"]=>
  bool(true)
  ["hash"]=>
  string(64) "96a500c972948f122add3af67da24276afefe306c0250430df1042aeb9391d80"
  ["class"]=>
  string(134) "mnt_Vps3_Mount_Package_Raxon_Parse_Test_Tpl_101_200_Smiley_Boot_3_tpl_96a500c972948f122add3af67da24276afefe306c0250430df1042aeb9391d80"
  ["namespace"]=>
  string(19) "Package\Raxon\Parse"
  ["debug"]=>
  bool(true)
}

[remco-pc]

@youkidearitai i tried to copy and paste your character in a test script in php storm and it breaks in there too, i cannot test it but the symbol can also not exist in the current font !

here you go:

root@ceb49d5d9721:/Application#  app raxon/parse compile -source=/mnt/Vps3/Mount/Package/Raxon/Parse/Test/Tpl/101-200/Smiley.Boot.4.tpl -options=1 --flags=2 -duration
/mnt/Vps3/Mount/Package/Raxon/Parse/Service/Build.php:1487
array(5) {
  ["tag"]=>
  string(57) "{{邉󠄀邉󠄀('邉󠄀', app.flags(), app.options())}}"
  ["line"]=>
  int(1)
  ["length"]=>
  int(42)
  ["column"]=>
  array(2) {
    ["start"]=>
    int(1)
    ["end"]=>
    int(43)
  }
  ["method"]=>
  array(2) {
    ["name"]=>
    string(14) "邉󠄀邉󠄀"
    ["argument"]=>
    array(3) {
      [0]=>
      array(2) {
        ["string"]=>
        string(9) "'邉󠄀'"
        ["array"]=>
        array(1) {
          [0]=>
          array(4) {
            ["value"]=>
            string(9) "'邉󠄀'"
            ["execute"]=>
            string(9) "'邉󠄀'"
            ["type"]=>
            string(6) "string"
            ["is_single_quoted"]=>
            bool(true)
          }
        }
      }
      [1]=>
      array(2) {
        ["string"]=>
        string(12) " app.flags()"
        ["array"]=>
        array(1) {
          [0]=>
          array(6) {
            ["type"]=>
            string(6) "method"
            ["method"]=>
            array(2) {
              ["name"]=>
              string(9) "app.flags"
              ["argument"]=>
              array(0) {
              }
            }
            ["tag"]=>
            string(0) ""
            ["line"]=>
            string(7) "unknown"
            ["length"]=>
            string(7) "unknown"
            ["column"]=>
            array(2) {
              ["start"]=>
              int(0)
              ["end"]=>
              int(0)
            }
          }
        }
      }
      [2]=>
      array(2) {
        ["string"]=>
        string(14) " app.options()"
        ["array"]=>
        array(1) {
          [0]=>
          array(6) {
            ["type"]=>
            string(6) "method"
            ["method"]=>
            array(2) {
              ["name"]=>
              string(11) "app.options"
              ["argument"]=>
              array(0) {
              }
            }
            ["tag"]=>
            string(0) ""
            ["line"]=>
            string(7) "unknown"
            ["length"]=>
            string(7) "unknown"
            ["column"]=>
            array(2) {
              ["start"]=>
              int(0)
              ["end"]=>
              int(0)
            }
          }
        }
      }
    }
  }
}

Press  enter  to continue or  ctrl-c  to break...

Raxon\Exception\LocateException

Plugin not found (邉󠄀邉󠄀) exception: "{{邉󠄀邉󠄀(\'邉󠄀\', app.flags(), app.options())}}" on line: 1, column: 1 in source: /mnt/Vps3/Mount/Package/Raxon/Parse/Test/Tpl/101-200/Smiley.Boot.4.tpl
file: /mnt/Vps3/Mount/Package/Raxon/Parse/Service/Build.php
line: 1488

Locations:
/tmp/raxon/org/61c0681b-70d5-4a76-88b9-4a6f2cdcbf00/0/Compile/CodePoint_37001_917760_37001_917760.php
/tmp/raxon/org/61c0681b-70d5-4a76-88b9-4a6f2cdcbf00/0/Class/_mnt_Vps3_Mount_Source_Plugin_CodePoint_37001_917760_37001_917760.php
/mnt/Vps3/Mount/Source/Plugin/CodePoint.37001.917760.37001.917760/CodePoint.37001.917760.37001.917760.php
/mnt/Vps3/Mount/Source/Plugin/CodePoint_37001_917760_37001_917760/CodePoint_37001_917760_37001_917760.php
/mnt/Vps3/Mount/Source/Plugin/CodePoint/.CodePoint.37001.917760.37001.917760.php
/mnt/Vps3/Mount/Source/Plugin/CodePoint/CodePoint.37001.917760.37001.917760.php
/mnt/Vps3/Mount/Source/Plugin/CodePoint/.CodePoint_37001_917760_37001_917760.php
/mnt/Vps3/Mount/Source/Plugin/CodePoint/CodePoint_37001_917760_37001_917760.php
/mnt/Vps3/Mount/Source/Plugin/CodePoint.37001.917760.37001.917760.php
/mnt/Vps3/Mount/Source/Plugin/CodePoint_37001_917760_37001_917760.php

Trace:
/Application/vendor/raxon/framework/src/Exception/LocateException.php (27) setDebugTrace
/tmp/raxon/org/61c0681b-70d5-4a76-88b9-4a6f2cdcbf00/0/Class/_mnt_Vps3_Mount_Package_Raxon_Parse_Service_Build.php (1488) __construct
/tmp/raxon/org/61c0681b-70d5-4a76-88b9-4a6f2cdcbf00/0/Class/_mnt_Vps3_Mount_Package_Raxon_Parse_Service_Build.php (2394) plugin
/tmp/raxon/org/61c0681b-70d5-4a76-88b9-4a6f2cdcbf00/0/Class/_mnt_Vps3_Mount_Package_Raxon_Parse_Service_Build.php (215) method
/tmp/raxon/org/61c0681b-70d5-4a76-88b9-4a6f2cdcbf00/0/Class/_mnt_Vps3_Mount_Package_Raxon_Parse_Service_Build.php (37) document_tag
/tmp/raxon/org/61c0681b-70d5-4a76-88b9-4a6f2cdcbf00/0/Class/_mnt_Vps3_Mount_Package_Raxon_Parse_Service_Parse.php (425) create
/tmp/raxon/org/61c0681b-70d5-4a76-88b9-4a6f2cdcbf00/0/Class/_mnt_Vps3_Mount_Package_Raxon_Parse_Trait_Main.php (34) compile
/tmp/raxon/org/61c0681b-70d5-4a76-88b9-4a6f2cdcbf00/0/Compile/Template_Compile_b64d1262113ac06e3d5d62e915dc9e6df210c43e.php (62) compile
/Application/vendor/raxon/framework/src/Module/Parse.php (890) run
/Application/vendor/raxon/framework/src/Module/Controller.php (742) compile
/mnt/Vps3/Mount/Package/Raxon/Parse/Controller/Cli.php (212) response
/Application/vendor/raxon/framework/src/App.php (503) run
/Application/Bin/Raxon.php (35) run
root@ceb49d5d9721:/Application#

root@ceb49d5d9721:/Application#

[youkidearitai]

@remco-pc You can use "\u{9089}\u{e0100}" instead of "邉󠄀".
Anyway, Unicode can multiple codepoint that other example é is "\u{0065}\u{0301}" and "\u{0065}\u{0301}" .