IP address encode/decode test.
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class Program {
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string encode_ip(string $dotquad_ip) {
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string[] $ip_sep = explode('.', $dotquad_ip);
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return sprintf('%02x%02x%02x%02x', $ip_sep[0], $ip_sep[1], $ip_sep[2], $ip_sep[3]);
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}
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string decode_ip(string $int_ip) {
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string[] $hexipbang = explode('.', chunk_split($int_ip, 2, '.'));
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return hexdec($hexipbang[0]) + '.' + hexdec($hexipbang[1]) + '.' + hexdec($hexipbang[2]) + '.' + hexdec($hexipbang[3]);
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}
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void main() {
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string $localhost = $this->encode_ip('127.0.0.1');
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print("127.0.0.1 ==> $localhost\n");
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string $router = $this->encode_ip('192.168.2.1');
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print("192.168.2.1 ==> $router\n");
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print("$localhost ==> ", $this->decode_ip($localhost) + PHP_EOL);
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print("$router ==> ", $this->decode_ip($router) + PHP_EOL);
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}
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}
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127.0.0.1 ==> 7f000001
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192.168.2.1 ==> c0a80201
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7f000001 ==> 127.0.0.1
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c0a80201 ==> 192.168.2.1
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