Online PHP editor | rfc for 0TroX

@ 2014-08-13T22:18:25Z

<?php

function pack_encode($format, $val) {
	$b64 = base64_encode(pack($format, $val));
	return str_replace(array('/', '='), array('_', ''), $b64);
}

function pack_decode($format, $val) {
	$b64 = str_replace('_', '/', $val); // un-padded
	$bytes = unpack($format, base64_decode($b64, false));
	return implode($bytes, ",");
	//return "foo";
	// return $hi << 8 | $lo;
}

function pack_encode_uint16($val) {
	return pack_encode('n', $val);
}

function pack_encode_uint32($val) {
	return pack_encode('N', $val);
}

function pack_decode_uint16($val) {
	return pack_decode('n', $val);
}

function pack_decode_uint32($val) {
	return pack_decode('N', $val);
}

$max = 32767;
$n = 20;
$step = intval($max/$n);

for ($i=0; $i<=$n; $i++) {
	$val = $i*$step;
	$enc16 = pack_encode_uint16($val);
	$enc32 = pack_encode_uint32($val);
	$str = base64_encode(strval($val)); // STUPID
	echo "$enc16 $enc32 $str $val";

	$dec16 = pack_decode_uint16($enc16);
	$dec32 = pack_decode_uint32($enc32);
	if ($dec16 != $val) {
 		echo " $dec16 != $val";
	} else if ($dec32 != $val) {
 		echo " $dec32 != $val";
	}
	echo "\n";
}

Output for git.master, git.master_jit, rfc.property-hooks: AAA AAAAAA MA== 0 Fatal error: Uncaught TypeError: implode(): Argument #2 ($array) must be of type ?array, string given in /in/0TroX:11 Stack trace: #0 /in/0TroX(11): implode(Array, ',') #1 /in/0TroX(25): pack_decode('n', 'AAA') #2 /in/0TroX(43): pack_decode_uint16('AAA') #3 {main} thrown in /in/0TroX on line 11
Process exited with code 255.

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2020-03-21 RFC: Is_Literal - declined
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