本文实例讲述了PHP进制转换。分享给大家供大家参考，具体如下：
可以实现：
10进制转换2、8、16、36、62进制
2、8、16、36、62进制转换10进制
有点要注意下，2、8、16进制转换时，使用的是系统的自己的函数。
所以，不管怎么高精度转换值可能大于2147483646。
另外，
32进制低精转换，最大值：2147483646；
32进制高精转换，最大值：77309411327；
64进制高精转换，最大值：133143986175。
jinzhi.php文件，自带演示功能。
进制转换/title><br />
</head><br />
<body></p>
<form id="jzh" name="jinzhih" method="post" action="">
<input name="go" type="hidden" value="100">
<table width="482" border="1" cellpadding="0" cellspacing="0" bordercolor="#FFE8E8" bgcolor="#F4F8FB">
<tr>
<td width="194"><select name="jinzhi0" id="jinzhi0">
<option value="2">2</option><option value="8">8</option><option value="10" selected="selected">10</option><option value="16">16</option><option value="36">36</option><option value="62">62</option></select><br />
进制</td>
<td width="275"><input name="zhi" type="text" id="zhi" /></td>
</tr>
<tr>
<td>进行<input name="lx" type="radio" value="0" checked="checked" />
普通<input type="radio" name="lx" value="1" />高精</td><td> </td>
</tr>
<tr>
<td>转换为
<select name="jinzhi1" id="jinzhi1">
<option value="2" selected="selected">2</option><option value="8">8</option><option value="10">10</option><option value="16">16</option><option value="36">36</option><option value="62">62</option></select>进制，</td><td>总长度为
<input name="changdu" type="text" id="changdu" value="10" size="4" maxlength="2" /><br />
字符。</td></tr><tr>
<td><input type="submit" name="Submit" value="提交" /></td>
<td><input type="reset" name="Submit2" value="重置" /></td>
</tr></table>
<p>注意：仅能进行10进制转换为2、8、16、36、62进制；或反转换。</p>
</form>
<p><?php
class jinzhi_class
{
//10进制转2、8、16、36、62进制
function jinzhih_0($shu,$jinzhi,$w)
{
$zifu = "";
while ($shu!=0){
$linshi = $shu%$jinzhi;
switch ($jinzhi){
case 2:
$zifu = decbin($shu);
return $zifu;
case 8:
$zifu = decoct($shu);
return $zifu;
case 16:
$zifu = dechex($shu);
return $zifu;
case 36:
if ($linshi>=10)<br />
{<br />
$zifu.= chr(($linshi+55));<br />
}else{<br />
$zifu.= $linshi;}<br />
break;<br />
case 62:<br />
if (($linshi>=10) && ($linshi36)) {$zifu.= chr($linshi+55);break;}<br />
if (($linshi>=36) && ($linshi62)) {$zifu.= chr($linshi+61);break;}<br />
$zifu.= $linshi;break;<br />
default:<br />
$zifu.= $linshi;<br />
break;<br />
}<br />
$shu = intval($shu/$jinzhi);<br />
}<br />
for ($i=strlen($zifu);$i$w;$i++)<br />
$zifu.="0";<br />
return strrev($zifu);}<br />
//2、8、16、36、62进制转10进制<br />
function jinzhih_1($zifu,$w)<br />
{ $shu=0;<br />
for ($i=0;$i=strlen($zifu)-1;$i++)<br />
{<br />
$linshi = substr($zifu,$i,1);<br />
switch ($jinzhi){<br />
case 2:<br />
$shu = bindec($zifu);<br />
$i=strlen($zifu)+1;<br />
break;<br />
case 8:<br />
$shu = octdec($zifu);<br />
$i=strlen($zifu)+1;<br />
break;<br />
case 16:<br />
$shu = hexdec($zifu);<br />
$i=strlen($zifu)+1;<br />
break;<br />
case 36:<br />
if (ord($linshi)=57)<br />
{$shu+=(ord($linshi)-48)*pow($jinzhi,strlen($zifu)-$i-1);<br />
}else{<br />
$shu=$shu + (ord($linshi)-55)*pow($jinzhi,strlen($zifu)-$i-1);}<br />
break;<br />
case 62:<br />
if (ord($linshi)=57)<br />
{$shu+=$linshi*pow($jinzhi,strlen($zifu)-$i-1);<br />
}elseif ((ord($linshi)>=65) && (ord($linshi)=90)){<br />
$shu+= (ord($linshi)-55)*pow($jinzhi,strlen($zifu)-$i-1);<br />
}else{<br />
$shu+= (ord($linshi)-61)*pow($jinzhi,strlen($zifu)-$i-1);}<br />
break;<br />
}<br />
}<br />
return $shu;<br />
}<br />
//10进制高精度转换2、8、16、36、62进制<br />
function jinzhih_G0($shu,$w)<br />
{<br />
$zifu = "";<br />
while ($shu!=0){<br />
$linshi = bcmod($shu,$jinzhi);<br />
switch ($jinzhi){<br />
case 2:<br />
$zifu = decbin($shu);<br />
return $zifu;<br />
case 8:<br />
$zifu = decoct($shu);<br />
return $zifu;<br />
case 16:<br />
$zifu = dechex($shu);<br />
return $zifu;<br />
case 36:<br />
if ($linshi>=10)<br />
{<br />
$zifu.= chr(($linshi+55));<br />
}else{<br />
$zifu.= $linshi;}<br />
break;<br />
case 62:<br />
if (($linshi>=10) && ($linshi36)) {$zifu.= chr($linshi+55);break;}<br />
if (($linshi>=36) && ($linshi62)) {$zifu.= chr($linshi+61);break;}<br />
$zifu.= $linshi;break;<br />
default:<br />
$zifu.= $linshi;<br />
break;<br />
}<br />
$shu = intval(bcdiv($shu,$jinzhi));<br />
}<br />
for ($i=strlen($zifu);$i$w;$i++)<br />
$zifu.="0";<br />
return strrev($zifu);}<br />
//2、8、16、36、62进制高精度转换10进制<br />
function jinzhih_G1($zifu,$w)<br />
{ $shu= "";<br />
for ($i=0;$i=strlen($zifu)-1;$i++)<br />
{<br />
$linshi = substr($zifu,1);<br />
switch ($jinzhi){<br />
case 2:<br />
$shu = bindec($zifu);<br />
$i=strlen($zifu)+1;<br />
break;<br />
case 8:<br />
$shu = octdec($zifu);<br />
$i=strlen($zifu)+1;<br />
break;<br />
case 16:<br />
$shu = hexdec($zifu);<br />
$i=strlen($zifu)+1;<br />
break;<br />
case 36:<br />
if (ord($linshi)=57)<br />
{$shu=bcadd($shu,bcmul((ord($linshi)-48),bcpow($jinzhi,strlen($zifu)-$i-1)));<br />
}else{<br />
$shu=bcadd($shu,bcmul((ord($linshi)-55),strlen($zifu)-$i-1)));}<br />
break;<br />
case 62:<br />
if (ord($linshi)=57)<br />
{$shu=bcadd($shu,bcmul($linshi,strlen($zifu)-$i-1)));<br />
}elseif ((ord($linshi)>=65) && (ord($linshi)=90)){<br />
$shu=bcadd($shu,strlen($zifu)-$i-1)));<br />
}else{<br />
$shu=bcadd($shu,bcmul((ord($linshi)-61),strlen($zifu)-$i-1)));<br />
}<br />
break;<br />
}<br />
}<br />
return $shu;}<br />
}<br />
if (isset($_GET["p"]))<br />
{if ($_GET["p"]==="1"){<br />
echo "";<br />
echo "提示：<br />
";<br />
echo "32进制低精转换，最大值：2147483646<br />
";<br />
echo "32进制高精转换，最大值：77309411327<br />
";<br />
echo "64进制高精转换，最大值：133143986175<br />
";<br />
echo "";<br />
echo "值为：";<br />
$Fs = new jinzhi_class();<br />
if ($_POST['lx']=="0" && $_POST['jinzhi0']=="10")<br />
{echo $Fs->jinzhih_0($_POST['zhi'],$_POST['jinzhi1'],$_POST['changdu'])."<br />
";}<br />
if ($_POST['lx']=="1" && $_POST['jinzhi0']=="10")<br />
{echo $Fs->jinzhih_G0($_POST['zhi'],$_POST['changdu']);}<br />
if ($_POST['lx']=="0" && $_POST['jinzhi0']>"10")<br />
{echo $Fs->jinzhih_1($_POST['zhi'],$_POST['jinzhi0'],$_POST['changdu']);}<br />
if ($_POST['lx']=="1" && $_POST['jinzhi0']>"10")<br />
{echo $Fs->jinzhih_G1($_POST['zhi'],$_POST['changdu']);}<br />
}<br />
echo "";}<br />
$mtime1 = explode(" ",microtime());<br />
$endTime = $mtime1[0] + $mtime1[1];<br />
printf ("页面执行时间：%.6fs.",$endTime-$startTime);<br />
?></pre>
<p>PS：这里再为大家推荐几款计算与转换工具供大家参考使用：</h3>
</p>
<p>在线任意进制转换工具：<br />
</h3>
</p>
<p>科学计算器在线使用_高级计算器在线计算：<br />
</h3>
</p>
<p>在线计算器_标准计算器：<br />
</h3>
</p>
<p>更多关于PHP相关内容感兴趣的读者可查看本站专题：《》、《》、《》、《》、《》、《》及《》</p>
<p>希望本文所述对大家PHP程序设计有所帮助。</p>
</p></p>
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