bin2hex

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

    bin2hex — 将二进制数据转换为十六进制表示形式

    说明

    bin2hex(string $string): string

    返回一个 ASCII 字符串，其中包含 string 的十六进制表示形式。转换以字节为单位进行，高字节在前。

    参数

    string

    一个字符串。

    返回值

    返回给定字符串的十六进制表示形式。

    示例

    示例 #1 bin2hex() 示例

    <?php

    $hex     = bin2hex('Hello world!');

    var_dump($hex);
    var_dump(hex2bin($hex));
    ?>

    上面的示例将输出

    string(24) "48656c6c6f20776f726c6421"
string(12) "Hello world!"

    参见

    • hex2bin() - 解码十六进制编码的二进制字符串
    • pack() - 将数据打包成二进制字符串

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    ＋添加注释

    用户贡献的注释 6 个注释

    59
    tehjosh at gamingg dot net
    17 年前
    此函数用于将二进制数据转换为十六进制字符串表示形式。此函数不用于将表示二进制数字的字符串转换为十六进制。如果您需要此功能，您可以简单地执行以下操作

    <?php
    $binary     = "11111001";
    $hex = dechex(bindec($binary));
    echo     $hex;
    ?>

    这将输出 "f9"。请记住，二进制数据和二进制的字符串表示之间存在很大区别。
    15
    j_lozinskit at yahoo dot co dot uk
    19 年前
    一个用于创建包含二进制数据的字符串以保存（例如将 SQL 语句保存到文件）到文本文件或 PHP 代码中的好方法是执行以下操作

    <?php
    $field    =bin2hex($field);
    $field=chunk_split($field,2,"\\x");
    $field= "\\x" . substr($field,0,-2);
    ?>

    这将把您的字段（二进制或非二进制）转换为十六进制，然后将十六进制转换为可以放置在 PHP 文件中的字符串

    FFFFFFFF -> \xFF\xFF\xFF\xFF
    7
    pedram at redhive dot com
    23 年前
    为了躲避垃圾邮件机器人，我看到人们（包括我自己）在 "mailto" 标签中对他们的电子邮件地址进行了十六进制编码。这是我编写的自动化此过程的小段代码

    <?php
    function hex_encode ($email_address) {
    $encoded = bin2hex("$email_address");
    $encoded = chunk_split($encoded, 2, '%');
    $encoded = '%' . substr($encoded, 0, strlen($encoded) - 1);
    return     $encoded;
    }
    ?>

    例如
    <a href="mailto:&lt;?=hex_encode("[email protected]")?>">给我发邮件</a>

    将生成以下地址
    %70%65%64%72%61%6d%40%72%65%64%68%69%76%65%2e%63%6f%6d

    -pedram
    3
    tightcode at hotmail dot com
    22 年前
    我只是浏览上面的内容，并做了一些修改，
    想出了以下我认为更灵活的方法

    <?php
    function bin2hex($data) {
    $corrected = ereg_replace("[^0-9a-fA-F]","",$data);
    return     pack("H".strlen($corrected),$corrected);
    }
    ?>

    这将确保无论您传递什么，即使是填充的
    在极端或对之间，都应返回所需数据。
    2
    subdivizion at gmail dot com
    14 年前
    这是一个用于检查字符串是否包含任何 7 位 GSM 字符的函数。

    这可能对在 SMS 平台上工作的人有用。

    <?php

    function check_gsm($str)
    {
    $arr = array(
    "0x00", "0x01", "0x02", "0x03", "0x04", "0x05","0x06","0x07","0x08","0x09",
    "0x0A","0x0B","0x0C","0x0D","0x0E","0x0F","0x10","0x11","0x12","0x13",
    "0x14","0x15","0x16","0x17","0x18","0x19","0x1A","0x1B","0x1B0A",
    "0x1B14","0x1B28","0x1B29","0x1B2F","0x1B3C","0x1B3D","0x1B3E",
    "0x1B40","0x1B65","0x1C","0x1D","0x1E","0x1F","0x20","0x21","0x22",
    "0x23","0x24","0x25","0x26","0x27","0x28","0x29","0x2A","0x2B","0x2C",
    "0x2D","0x2E","0x2F","0x30","0x31","0x32","0x33","0x34","0x35","0x36",
    "0x37","0x38","0x39","0x3A","0x3B","0x3C","0x3D","0x3E","0x3F","0x40",
    "0x41","0x42","0x43","0x44","0x45","0x46","0x47","0x48","0x49","0x4A",
    "0x4B","0x4C","0x4D","0x4E","0x4F","0x50","0x51","0x52","0x53","0x54",
    "0x55","0x56","0x57","0x58","0x59","0x5A","0x5B","0x5C","0x5D","0x5E",
    "0x5F","0x60","0x61","0x62","0x63","0x64","0x65","0x66","0x67","0x68",
    "0x69","0x6A","0x6B","0x6C","0x6D","0x6E","0x6F","0x70","0x71","0x72",
    "0x73","0x74","0x75","0x76","0x77","0x78","0x79","0x7A","0x7B","0x7C",
    "0x7D","0x7E","0x7F");

    $strl = strlen($str);
    for (    $i = 0;$i < $strl; $i++)
    {
    $char = '0x' . bin2hex(substr($str,$i,1));
    $pos = in_array($char,$arr);
    if (    $pos == 1)
    {
    $j++;
    }
    }

    if (    $j < $strl)
    {
    return     false;
    }
    else
    {
    return     true;
    }
    }
    ?>
    1
    busuioc dot alexandru at gmail dot com
    5 年前
    生成 API 密钥的便捷方式

    <?php
    $apikey     = bin2hex(random_bytes(32)); // 生成 64 个字符长的字符串 /^[0-9a-f]{64}$/
    ?>
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