Online PHP editor | output for 4Jata

@ 2018-06-23T17:36:10Z

<?php

class Buffer extends \SplFixedArray
{
    private function fill(string $data = '')
    {
        for ($i = 0, $l = $this->getSize(); $i < $l; $i++) {
            $this[$i] = $data[$i] ?? 0;
        }
    }
    
    public function __construct($arg)
    {
        if (\is_int($arg)) {
            parent::__construct($arg);
            $this->fill();

            return;
        }
        
        if (\is_string($arg)) {
            parent::__construct(\strlen($arg));
            $this->fill($arg);

            return;
        }

    }
    
    public function setSize($value)
    {
        throw new \Error('Buffer cannot be resized');
    }
    
    public function offsetSet($index, $byte)
    {
        if (\is_int($byte) && $byte >= 0 && $byte <= 255) {
            parent::offsetSet($index, $byte);
            return;
        } 

        if (!\is_string($byte) || \strlen($byte) != 1 || ($byte = \ord($byte)) < 0 || $byte > 255) {
            throw new \Error('Buffer element value must be integer in the range 0 - 255 or single-byte string');
        }

        parent::offsetSet($index, $byte);
    }
    
    public function offsetUnset($index)
    {
        throw new \Error('Buffer elements cannot be unset');
    }
    
    public function __toString()
    {
        return \implode('', \array_map('chr', $this->toArray()));
    }
}

$publicKey = new Buffer(\hex2bin('F1F5AC76CC3BCA543DBF7DEBFE77101343B72ABE582FF1D2E8767916EA792F32'));
$signature = new Buffer(\hex2bin('4D363B793632444DC36FCB78F7993FC1C04FCA43F498ABC883DE772A7E616C98290D326306ABC772370E73338FD34D24B207F0F69F8652004001909B6907E986'));

$publicKey[31] &= 0x7f;
$publicKey[31] |= ($signature[63] & 0x80);
$signature[63] &= 0x7f;
  
var_dump(bin2hex((string)$publicKey));
var_dump(bin2hex((string)$signature));

Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.4, 8.3.6 - 8.3.7: Deprecated: Return type of Buffer::offsetSet($index, $byte) should either be compatible with SplFixedArray::offsetSet($index, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/4Jata on line 35 Deprecated: Return type of Buffer::offsetUnset($index) should either be compatible with SplFixedArray::offsetUnset($index): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/4Jata on line 49 string(64) "f1f5ac76cc3bca543dbf7debfe77101343b72abe582ff1d2e8767916ea792fb2" string(128) "4d363b793632444dc36fcb78f7993fc1c04fca43f498abc883de772a7e616c98290d326306abc772370e73338fd34d24b207f0f69f8652004001909b6907e906"
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Deprecated: Return type of Buffer::offsetSet($index, $byte) should either be compatible with SplFixedArray::offsetSet($index, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/4Jata on line 35 Deprecated: Return type of Buffer::offsetUnset($index) should either be compatible with SplFixedArray::offsetUnset($index): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /in/4Jata on line 49 string(64) "f1f5ac76cc3bca543dbf7debfe77101343b72abe582ff1d2e8767916ea792fb2" string(128) "4d363b793632444dc36fcb78f7993fc1c04fca43f498abc883de772a7e616c98290d326306abc772370e73338fd34d24b207f0f69f8652004001909b6907e906"
Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30: string(64) "f1f5ac76cc3bca543dbf7debfe77101343b72abe582ff1d2e8767916ea792fb2" string(128) "4d363b793632444dc36fcb78f7993fc1c04fca43f498abc883de772a7e616c98290d326306abc772370e73338fd34d24b207f0f69f8652004001909b6907e906"

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