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Unicode·ûºÅ·¶Î§           | UTF-8±àÂ뷽ʽ
u0000 0000 - u0000 007F   | 0xxxxxxx
u0000 0080 - u0000 07FF   | 110xxxxx 10xxxxxx
u0000 0800 - u0000 FFFF   | 1110xxxx 10xxxxxx 10xxxxxx
ÓÉÓÚĿǰutf-8ʹÓõÄ×Ö·û¶¼ÊǾÓÓÚUCS-2µÄ£¬Òò´Ë¶ÔÓÚ4-6×Ö½Ú±àÂëµÄÇé¿öÊDz»±Ø¿¼Âǵģ¬Í¬ÑùµØ£¬ÔÚ·´Ïòת»»µÄʱºò£¬Èç¹û³öÏÖËÄ×Ö½ÚÒÔÉϵÄutf-8×Ö·û£¬¿ÉÒÔÖ±½ÓÊÓΪÂÒÂëºöÂÔµô»òתΪunicodeʵÌåÐÎʽ("&#long int;"ÐÎʽ)£¬È»ºó½»¸øä¯ÀÀÆ÷»òÏà¹Ø½âÎö³ÌÐòÈ¥´¦Àí£¬ÓÃphp°ÑunicodeתΪutf-8±àÂëµÄËã·¨ÈçÏ£º
/*
 * ²ÎÊý $c ÊÇunicode×Ö·û±àÂëµÄintÀàÐÍÊýÖµ£¬Èç¹ûÊÇÓöþ½øÖƶÁÈ¡µÄÊý¾Ý£¬ÔÚphpÖÐͨ³£ÒªÓà hexdec(bin2hex( $bin_unichar )) ÕâÑùת»»
 */
function uni2utf8( $c )
{
  if ($c < 0x80)
  {
        $utf8char = chr($c);
  }
  else if ($c < 0x800)
  {
        $utf8char = chr(0xC0 | $c >> 0x06).chr(0x80 | $c & 0x3F);
  }
  else if ($c < 0x10000)
  {
        $utf8char = chr(0xE0 | $c >> 0x0C).chr(0x80 | $c >> 0x06 & 0x3F).chr(0x80 | $c & 0x3F);
  }
  //ÒòΪUCS-2Ö»ÓÐÁ½×Ö½Ú£¬ËùÒÔºóÃæµÄÇé¿öÊDz»¿ÉÄܳöÏֵģ¬ÕâÀïÖ»ÊÇ˵Ã÷unicode HTMLʵÌå±àÂëµ


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<?php
# test.php
function test(){
     static $sss = 0;
     ++$sss;
     echo $sss;
}
test();
?>
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<?php
header("Content-type:application/vnd.ms-excel");
header("Content-Disposition:filename=php100.xls");

/* echo "A1\t B1\t C1\n";
echo "A1\t B1\t C1\n";
echo "A1\t B1\t C1\n";
*/
?>
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PHP ×Ö·û´®½ØÈ¡

<?php
//$str = "abcdef¡ôÖлªÈËÃñ¹²ºÍ¹ú";
//$str = "1234567890";
$str = "ÖлªÈËÃñ¹²ºÍ¹úabcÖлªÈËÃñ¹²ºÍ¹úÖлªÈËÃñ¹²ºÍ¹ú";
$str = cut_str($str, 18);
echo $str;
function cut_str($str, $len){
 if(strlen($str) <= $len) return $str;
 $n = 0;
 $tempstr = '';
 for($i = 0; ......

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