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$arr = array('a'..'1'..'ÖÐ');

$s = $arr[rand(0,sizeof($arr)-1)]; //Äã²»»áÏë°ÑËùÓеĺº×Ö¶¼ÁÐÈëËæ¼´ÁбíÀïÈ¥°É -¡£-

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$arr = array('a'..'1'..'ÖÐ');

$s = $arr[rand(0,sizeof($arr)-1)]; //Äã²»»áÏë°ÑËùÓеĺº×Ö¶¼ÁÐÈëËæ¼´ÁбíÀïÈ¥°É -¡£-




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PHP code:

$rand[0]=array("min"=>48,"max"=>57);
$rand[1]=array("min"=>65,"max"=>90);
$rand[2]=array("min"=>97,"max"=>122);
$num=4;
$codestr='';
for($i=0;$i<$num;$i++){
$codekey=rand(0,count($rand)-1);
$codestr .= chr(rand($rand[$codekey]['min'],$rand[$codekey]['max']));
}
echo $codestr;



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$to = 'xueyuxia1988@sohu.com';
$subject = 'the subject';
$message = 'hello';
$ ......

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