下面这个函数是一个PHP 打印出字符串的16进制实例,这里面的核心函数就是 chr获取二进制然后再进行转成16进制数,代码如下:
@H_403_3@ <?PHP /* PHP 打印出字符串的16进制数据 */ function hex_dump($data, $newline="n") { static $from = ''; static $to = ''; static $width = 16; # number of bytes per line static $pad = '.'; # padding for non-visible characters if ($from==='') { for ($i=0; $i<=0xFF; $i++) { $from .= chr($i); $to .= ($i >= 0x20 && $i <= 0x7E) ? chr($i) : $pad; } } $hex = str_split(bin2hex($data), $width*2); $chars = str_split(strtr($data, $from, $to), $width); $offset = 0; foreach ($hex as $i => $line) { echo sprintf('%6X',$offset).' : '.implode(' ', str_split($line,2)) . ' [' . $chars[$i] . ']' . $newline; $offset += $width; } } $info="this is a testx00x99hex_dump"; print_r(hex_dump($info)); /* 输出结果： 0 : 74 68 69 73 20 69 73 20 61 20 74 65 73 74 00 99 [this is a test..] 10 : 68 65 78 5f 64 75 6d 70 [hex_dump] */ ?>
