Microsoft Windows [版本 5.2.3790]
(C) 版权所有 1985-2003 Microsoft Corp.

C:\Documents and Settings\Administrator>php
<?php
$a = 3486675506;
echo dechex($a);

?>
^Z
cfd27232
C:\Documents and Settings\Administrator>php
<?php
$a = array(0xcf, 0xd2, 0x72, 0x32);
var_dump(array_map('hexdec', $a));
?>
^Z
array(4) {
  [0]=>
  int(519)
  [1]=>
  int(528)
  [2]=>
  int(276)
  [3]=>
  int(80)
}

C:\Documents and Settings\Administrator>php
$a = array(0x0cf, 0x0d2, 0x072, 0x032);
^Z
$a = array(0x0cf, 0x0d2, 0x072, 0x032);

C:\Documents and Settings\Administrator>php
<?php
$a = array(0x0cf, 0x0d2, 0x072, 0x032);
echo hexdec(0xcf);
?>
^Z
519
C:\Documents and Settings\Administrator>php
<?php
$a = array("\xcf", "\x0d2", "\x072", "\x032");
var_dump($a);
?>
^Z
array(4) {
  [0]=>
  string(1) "?
  [1]=>
2"string(2) "
  [2]=>
  string(2) "2"
  [3]=>
  string(2) "2"
}

C:\Documents and Settings\Administrator>php
<?php
$a = array("\xcf", "\x0d2", "\x072", "\x032");
foreach ($a as $value)
echo $value;
?>
^Z
222
C:\Documents and Settings\Administrator>php
<?php
$a = array("\xcf", "\x0d2", "\x072", "\x032");
foreach ($a as $value)
echo ord($value);
?>
^Z
2071373
C:\Documents and Settings\Administrator>php
<?php
$a = array("\xcf", "\x0d2", "\x072", "\x032");
foreach ($a as $value)
echo ord($value).' ';
?>
^Z
207 13 7 3
C:\Documents and Settings\Administrator>