Online PHP editor | output for MHERV

@ 2018-10-11T20:26:41Z

<?php

echo "Leading zeroes are not significant: ";
var_dump(inet_pton("2001:0010::") == inet_pton("2001:10::"));

echo "2001:0010:: ";
var_dump(filter_var("2001:0010::", FILTER_VALIDATE_IP, FILTER_FLAG_NO_RES_RANGE));

echo "2001:10::   ";
var_dump(filter_var("2001:10::", FILTER_VALIDATE_IP, FILTER_FLAG_NO_RES_RANGE));

echo "\n";

echo "Testing manually: ";
$inet = array_map("hexdec", array_map("bin2hex", str_split(inet_pton("2001:10::"), 2)));
var_dump($inet[0] != 0x2001 || ($inet[1] & 0xFFF0) != 0x0010);

Output for 8.3.16 - 8.3.26, 8.4.3 - 8.4.14: Leading zeroes are not significant: bool(true) 2001:0010:: string(11) "2001:0010::" 2001:10:: string(9) "2001:10::" Testing manually: bool(false)
Output for 7.4.25 - 7.4.33, 8.0.12 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.15, 8.4.1 - 8.4.2: Leading zeroes are not significant: bool(true) 2001:0010:: bool(false) 2001:10:: bool(false) Testing manually: bool(false)
Output for 5.6.38, 7.1.0 - 7.1.23, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.24, 8.0.0 - 8.0.11: Leading zeroes are not significant: bool(true) 2001:0010:: bool(false) 2001:10:: string(9) "2001:10::" Testing manually: bool(false)

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