Online PHP editor | rfc for PBHQ9

@ 2014-08-14T02:22:15Z

<?php

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

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

$vals = array(0, 1, 99, 100, 255, 256, 999, 1000, 9999, 10000, 65535, 65536, 99999, 100000, 500000, 999999, 1000000, 4294967295, 4294967296);
foreach ($vals as $val) {
	$enc = gdr_encode($val);
	$dec = gdr_decode($enc);
	if ($dec !== $val) {
		echo "ERROR: $val => $enc => $dec\n";
	} else if (strlen($enc)+2 > strlen($val)) {
		echo "\"$enc\" $val WORSE\n";
	} else if (strlen($enc)+2 == strlen($val)) {
		echo "\"$enc\" $val EQUAL\n";
	} else {
		echo "\"$enc\" $val\n";
	}
}

Output for git.master, git.master_jit, rfc.property-hooks: "" 0 WORSE "B" 1 WORSE "BH" 99 WORSE "BI" 100 WORSE "C*" 255 WORSE "C+" 256 WORSE "K=" 999 WORSE "K>" 1000 EQUAL "BQ!" 9999 WORSE "BQ#" 10000 EQUAL "H'f" 65535 EQUAL "H'g" 65536 EQUAL "L-`" 99999 EQUAL "L-{" 100000 "7G+" 500000 "BaNz" 999999 EQUAL "BaN0" 1000000 "7`7nL" 4294967295 "7`7nM" 4294967296

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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