3v4l.org

run code in 300+ PHP versions simultaneously

@ 2014-08-14T01:58:55Z

<?php

function gdr_encode($val) {
	$chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789!=';
	$base = strlen($chars);
	$str = '';
	while ($val > 0) {
		$str .= $chars[$val % $base];
		$val = (int)($val / $base);
	}
	return $str;
}

function gdr_decode($str) {
	$chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789!=';
	$base = strlen($chars);
	$map = array();
	for ($i=0; $i<$base; $i++) {
		$map[$chars[$i]] = $i;
	}
	//echo print_r($map, false) . "\n";
	$val = 0;
	echo print_r($str, false) . "\n";
	echo print_r(strlen($str), false) . "\n";
	for ($i=0; $i<strlen($str); $i++) {
		$val *= $base;
		$char = $str[$i];
		//echo "{$str[$i]}\n";
		$val += (int)$map[$str[$i]];
	}
	return $val;
}

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

Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: "B"1 31 Warning: Undefined array key """ in /in/rYT4V on line 29 Warning: Undefined array key """ in /in/rYT4V on line 29 "B" 1 WORSE
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33: "B"1 31 Notice: Undefined index: " in /in/rYT4V on line 29 Notice: Undefined index: " in /in/rYT4V on line 29 "B" 1 WORSE
Output for 7.3.32 - 7.3.33: "B"1 31 "B" 1 WORSE
Output for 5.2.0 - 5.2.17: "B"1 31 Notice: Undefined index: " in /in/rYT4V on line 29 Notice: Undefined index: " in /in/rYT4V on line 29 "B" 1 WORSE
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6: Fatal error: Call to undefined function json_encode() in /in/rYT4V on line 37
Process exited with code 255.
Output for 4.4.5 - 4.4.9: Fatal error: Call to undefined function: json_encode() in /in/rYT4V on line 37
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.4: Fatal error: Call to undefined function: json_encode() in /in/rYT4V on line 37
Process exited with code 255.
Output for 4.3.0 - 4.3.1: Fatal error: Call to undefined function: json_encode() in /in/rYT4V on line 37

preferences:dark modelive preview

259.21 ms | 401 KiB | 459 Q