Online PHP editor | rfc for uO3ph

@ 2014-08-13T22:37:57Z

<?php

function pack_encode($format, $val) {
	$b64 = base64_encode(pack($format, $val));
	return str_replace(array('/', '='), array('_', ''), $b64); // "/" json-encodes poorly and "=" is padding
}

function pack_decode($format, $width, $bin) {
	$b64 = str_replace('_', '/', $bin); // un-padded
	$data = unpack($format, base64_decode($b64, false));
	$val = 0;
	foreach ($data as $v) {
		$val = ($val<<$width) | $v;
	}
	return $val;
}

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', 16, $val);
}

function pack_decode_uint32($val) {
	return pack_decode('N', 32, $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 BmY AAAGZg MTYzOA== 1638 DMw AAAMzA MzI3Ng== 3276 EzI AAATMg NDkxNA== 4914 GZg AAAZmA NjU1Mg== 6552 H_4 AAAf_g ODE5MA== 8190 JmQ AAAmZA OTgyOA== 9828 LMo AAAsyg MTE0NjY= 11466 MzA AAAzMA MTMxMDQ= 13104 OZY AAA5lg MTQ3NDI= 14742 P_w AAA__A MTYzODA= 16380 RmI AABGYg MTgwMTg= 18018 TMg AABMyA MTk2NTY= 19656 Uy4 AABTLg MjEyOTQ= 21294 WZQ AABZlA MjI5MzI= 22932 X_o AABf+g MjQ1NzA= 24570 ZmA AABmYA MjYyMDg= 26208 bMY AABsxg Mjc4NDY= 27846 cyw AABzLA Mjk0ODQ= 29484 eZI AAB5kg MzExMjI= 31122 f_g AAB_+A MzI3NjA= 32760

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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