getprotobynumber

    (PHP 4, PHP 5, PHP 7, PHP 8)

    getprotobynumber — Get protocol name associated with protocol number

    Description

    getprotobynumber(int $protocol): string|false

    getprotobynumber() returns the protocol name associated with protocol protocol as per /etc/protocols.

    Parameters

    protocol

    The protocol number.

    Return Values

    Returns the protocol name as a string, or false on failure.

    See Also

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    User Contributed Notes 3 notes

    up
    3
    recycling dot sp dot am at gmail dot com
    14 years ago
    Note that by the time of writing this note (5.3.3), there seems to be only two defined constants for the protocol numbers: SOL_UDP and SOL_TCP.
    For all other protocols (like ICMP,... ) you'll have to provide the exact number (EG: 1 for ICMP, ... )
    <?php
    echo getprotobynumber(SOL_TCP) . "\n"; // prints tcp
    echo getprotobynumber(SOL_UDP) . "\n"; // prints udp
    var_dump(getprotobyname('tcp') == SOL_TCP); // bool(true)
    var_dump(getprotobyname('udp') == SOL_UDP); // bool(true)
    ?>
    On a UNIX system (don't know if this is true for Windows), the php functions getprotobyname and getprotobynumber are just wrapper for their corresponding system calls. These functions returns the protocol name or protocol number based on the definition from IANA. If you are looking for a protocol and you don't know its number, you can find the exact protocol number here: http://www.iana.org/assignments/protocol-numbers
    up
    2
    i at tiankonguse dot com
    10 years ago
    getprotobynumber()
    =====================
    getprotobynumber() gets the protocol name for the given protocol number on the local system.

    If the protocol number is not recognized,the function returns FALSE.

    The given code snippet gives the list of protocols along with their protocol numbers

    =====================
    code

    <?
    $format = "number <---> protocol\n<br />";
    $format = "%6s <---> %s\n<br />";
    for($number = 0; $number < 255; $number ++) {
    if (getprotobynumber ( $number ))

    printf ( $format, " $number", getprotobynumber ( $number ) );
    }
    ?>

    =====================
    OUTPUT:
    0 <---> ip
    1 <---> icmp
    2 <---> igmp
    3 <---> ggp
    4 <---> ipencap
    5 <---> st
    6 <---> tcp
    8 <---> egp
    9 <---> igp
    12 <---> pup
    17 <---> udp
    20 <---> hmp
    22 <---> xns-idp
    27 <---> rdp
    29 <---> iso-tp4
    33 <---> dccp
    36 <---> xtp
    37 <---> ddp
    38 <---> idpr-cmtp
    41 <---> ipv6
    43 <---> ipv6-route
    44 <---> ipv6-frag
    45 <---> idrp
    46 <---> rsvp
    47 <---> gre
    50 <---> esp
    51 <---> ah
    57 <---> skip
    58 <---> ipv6-icmp
    59 <---> ipv6-nonxt
    60 <---> ipv6-opts
    73 <---> rspf
    81 <---> vmtp
    88 <---> eigrp
    89 <---> ospf
    93 <---> ax.25
    94 <---> ipip
    97 <---> etherip
    98 <---> encap
    103 <---> pim
    108 <---> ipcomp
    112 <---> vrrp
    115 <---> l2tp
    124 <---> isis
    132 <---> sctp
    133 <---> fc
    135 <---> mobility-header
    136 <---> udplite
    137 <---> mpls-in-ip
    138 <---> manet
    139 <---> hip
    140 <---> shim6
    141 <---> wesp
    142 <---> rohc
    up
    1
    Vipindas K.S
    16 years ago
    getprotobynumber()
    =====================
    getprotobynumber() gets the protocol name for the given protocol number on the local system. If the protocol number is not recognized,the function returns FALSE.The given code snippet gives the list of protocols along with their protocol numbers

    <?
    $format = "%6s %s\n<br />";
    for ($number = 0; $number < 255; $number++)
    {
    if (getprotobynumber ($number))

    printf ($format, " $number-->", getprotobynumber ($number));
    }

    ?>

    OUTPUT:

    0--> ip
    1--> icmp
    3--> ggp
    6--> tcp
    8--> egp
    12--> pup
    17--> udp
    20--> hmp
    22--> xns-idp
    27--> rdp
    66--> rvd
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