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run code in 300+ PHP versions simultaneously

@ 2021-06-09T11:59:33Z

<?php

declare(strict_types=1);

const PI_NAME = 'Число Пи';
const E_NAME = 'Число Эйлера';

final class Interpolator
{
    public function __construct(
        private string $format = '%s'
    ) {
    }

    public function __invoke(mixed $value): string
    {
        return sprintf($this->format, $value);
    }
}

$sprintfString = sprintf(
    <<<'JSON'
        [
          { "value": "%s", "name": "%s" },
          { "value": "%s", "name": "%s" }
        ]
        JSON,
    pi(),
    PI_NAME,
    M_E,
    E_NAME,
);

$intrp = new Interpolator();

$intrpString = <<<JSON
    [
      { "value": "{$intrp(pi())}", "name": "{$intrp(PI_NAME)}" },
      { "value": "{$intrp(M_E)}", "name": "{$intrp(E_NAME)}" }
    ]
    JSON;

var_dump(assert($sprintfString === $intrpString));

Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.4, 8.3.6 - 8.3.25, 8.4.1 - 8.4.12: bool(true)
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 bool(true)
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33: Parse error: syntax error, unexpected 'private' (T_PRIVATE), expecting variable (T_VARIABLE) in /in/DogHB on line 11
Process exited with code 255.

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