Online PHP editor | rfc for PX4Lq

@ 2014-08-14T06:18:40Z

<?php

function gdr_encode($val) {
	// all characters that json encode without escaping
	$chrs = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789 !#$%&\'()*+,-.:;<=>?@[]^_`{|}~';
	$base = strlen($chrs);
	$str = '';
	while ($val > 0) {
		$str = $chrs[$val % $base] . $str;
		$val = (int)($val / $base);
	}
	return $str;
}

function gdr_decode($str) {
	// all characters that json encode without escaping
	$chrs = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789 !#$%&\'()*+,-.:;<=>?@[]^_`{|}~';
	$base = strlen($chrs);
	$map = array();
	for ($i=0; $i<$base; $i++) {
		$map[$chrs[$i]] = $i;
	}
	$val = 0;
	for ($i=0; $i<strlen($str); $i++) {
		$val *= $base;
		$val += (int)$map[$str[$i]];
	}
	return $val;
}

function duration($val) {
	if ($val < 24) {
		return sprintf('%d', $val).'h';
	}
	if ($val < 24*10) {
		return sprintf('%1.1f', $val/24).'d';
	}
	if ($val < 168*10) {
		return sprintf('%1.1f', $val/168).'w';
	}
	//if ($val < 730*10) {
	//	return sprintf('%1.1f', $val/730).'m';
	//}
	return sprintf('%1.1f', $val/8760).'y';
}

$vals = array(
	0, 1, 99, 100, 255, 256, 999, 1000, 9999, 10000, 65535, 65536, 99999,
	100000, 250000, 500000, 750000, 999999, 1000000, //4294967295, 4294967296
);
echo sprintf("%7s %6s %7s %5s\n", 'num', 'str', 'time', 'cmp');
foreach ($vals as $val) {
	$enc = gdr_encode($val);
	$dec = gdr_decode($enc);
	if ($dec !== $val) {
		echo "ERROR: $val => $enc => $dec\n";
	} else {
		echo sprintf("%7d %6s %7s %5d\n", $dec, "\"$enc\"", duration($val), strlen($enc)+2-strlen($val));
	}
}

Output for git.master, git.master_jit, rfc.property-hooks: num str time cmp 0 "" 0h 1 1 "B" 1h 2 99 "BH" 4.1d 2 100 "BI" 4.2d 1 255 "C*" 1.5w 1 256 "C+" 1.5w 1 999 "K=" 5.9w 1 1000 "K>" 6.0w 0 9999 "BQ!" 1.1y 1 10000 "BQ#" 1.1y 0 65535 "H'f" 7.5y 0 65536 "H'g" 7.5y 0 99999 "L-`" 11.4y 0 100000 "L-{" 11.4y -1 250000 "dxk" 28.5y -1 500000 "7G+" 57.1y -1 750000 "{4Q" 85.6y -1 999999 "BaNz" 114.2y 0 1000000 "BaN0" 114.2y -1

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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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