php實(shí)現(xiàn)36進(jìn)制與10進(jìn)制轉(zhuǎn)換功能示例
文章主要介紹了php實(shí)現(xiàn)36進(jìn)制與10進(jìn)制轉(zhuǎn)換功能,結(jié)合實(shí)例形式分析了php數(shù)值運(yùn)算與字符串操作的相關(guān)技巧,需要的朋友可以參考下。
本文實(shí)例講述了php實(shí)現(xiàn)36進(jìn)制與10進(jìn)制轉(zhuǎn)換功能。分享給大家供大家參考，具體如下：
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/**
* @desc im:十進(jìn)制數(shù)轉(zhuǎn)換成三十六機(jī)制數(shù)
* @param (int)$num 十進(jìn)制數(shù)
* return 返回：三十六進(jìn)制數(shù)
*/
function get_char($num) {
$num = intval($num);
if ($num <= 0)
return false;
$charArr = array("0","1","2","3","4","5","6","7","8","9",'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z');
$char = '';
do {
$key = ($num - 1) % 36;
$char= $charArr[$key] . $char;
$num = floor(($num - $key) / 36);
} while ($num > 0);
return $char;
}
/**
* @desc im:三十六進(jìn)制數(shù)轉(zhuǎn)換成十機(jī)制數(shù)
* @param (string)$char 三十六進(jìn)制數(shù)
* return 返回：十進(jìn)制數(shù)
*/
function get_num($char){
$array=array("0","1","2","3","4","5","6","7","8","9","A", "B", "C", "D","E", "F", "G", "H", "I", "J", "K", "L","M", "N", "O","P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y","Z");
$len=strlen($char);
for($i=0;$i<$len;$i++){
$index=array_search($char[$i],$array);
$sum+=($index+1)*pow(36,$len-$i-1);
}
return $sum;
}
使用實(shí)例:
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echo "get_char:".get_char(514549)."<br>";
echo "get_num:".get_num('A0ZZ')."<br>";
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