export_object.php

<?php

function export_object($value, string $indent = '')
{
    switch (true) {
        case \is_int($value) || \is_float($value): return var_export($value, true);
        case [] === $value: return '[]';
        case false === $value: return 'false';
        case true === $value: return 'true';
        case null === $value: return 'null';
        case '' === $value: return "''";
        case $value instanceof \UnitEnum: return '\\'.ltrim(var_export($value, true), '\\');
    }

    $subIndent = $indent.'    ';

    if (\is_string($value)) {
        $code = sprintf("'%s'", addcslashes($value, "'\\"));

        $code = preg_replace_callback("/((?:[\\0\\r\\n]|\u{202A}|\u{202B}|\u{202D}|\u{202E}|\u{2066}|\u{2067}|\u{2068}|\u{202C}|\u{2069})++)(.)/", function ($m) use ($subIndent) {
            $m[1] = sprintf('\'."%s".\'', str_replace(
                ["\0", "\r", "\n", "\u{202A}", "\u{202B}", "\u{202D}", "\u{202E}", "\u{2066}", "\u{2067}", "\u{2068}", "\u{202C}", "\u{2069}", '\n\\'],
                ['\0', '\r', '\n', '\u{202A}', '\u{202B}', '\u{202D}', '\u{202E}', '\u{2066}', '\u{2067}', '\u{2068}', '\u{202C}', '\u{2069}', '\n"'."\n".$subIndent.'."\\'],
                $m[1]
            ));

            if ("'" === $m[2]) {
                return substr($m[1], 0, -2);
            }

            if ('n".\'' === substr($m[1], -4)) {
                return substr_replace($m[1], "\n".$subIndent.".'".$m[2], -2);
            }

            return $m[1].$m[2];
        }, $code, -1, $count);

        if ($count && str_starts_with($code, "''.")) {
            $code = substr($code, 3);
        }

        return $code;
    }

    if (\is_array($value) || ($value instanceof \stdClass)) {
        $j = -1;
        $code = '';
        foreach ($value as $k => $v) {
            $code .= $subIndent;
            if (!\is_int($k) || 1 !== $k - $j) {
                $code .= export_object($k, $subIndent).' => ';
            }
            if (\is_int($k) && $k > $j) {
                $j = $k;
            }
            $code .= export_object($v, $subIndent).",\n";
        }

        $pref = '';
        if ($value instanceof \stdClass) {
            $pref = '(object) ';
        }

        return $pref."[\n".$code.$indent.']';
    }

    throw new \UnexpectedValueException('Type not supported');
}

I love this code a lot!!

Only one question, what's a good test example you would recommend?

I love this code a lot!!

Only one question, what's a good test example you would recommend?

The code is not mine, it's a part of Symfony/var-exporter code. It works the same as var_export with a short array syntax. This portion of this code is only for a variable type other than objects of a class instance.
https://www.php.net/manual/en/function.var-export.php
https://github.com/symfony/var-exporter/blob/6.2/Internal/Exporter.php#L194

Thank you so much mate!