这篇文章主要介绍了php进制转换,结合具体实例形式分析了2,8,16,36,64进制至10进制相互转换实现技巧,具有一定参考借鉴价值,需要的朋友可以参考下
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
立即学习“PHP免费学习笔记（深入）”；
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。
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进制转换/title> </head> <body> <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> 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" /> 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> <?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) { $zifu.= chr(($linshi+55)); }else{ $zifu.= $linshi;} break; case 62: if (($linshi>=10) && ($linshi36)) {$zifu.= chr($linshi+55);break;} if (($linshi>=36) && ($linshi62)) {$zifu.= chr($linshi+61);break;} $zifu.= $linshi;break; default: $zifu.= $linshi; break; } $shu = intval($shu/$jinzhi); } for ($i=strlen($zifu);$i$w;$i++) $zifu.="0"; return strrev($zifu);} //2、8、16、36、62进制转10进制 function jinzhih_1($zifu,$jinzhi,$w) { $shu=0; for ($i=0;$i=strlen($zifu)-1;$i++) { $linshi = substr($zifu,$i,1); switch ($jinzhi){ case 2: $shu = bindec($zifu); $i=strlen($zifu)+1; break; case 8: $shu = octdec($zifu); $i=strlen($zifu)+1; break; case 16: $shu = hexdec($zifu); $i=strlen($zifu)+1; break; case 36: if (ord($linshi)=57) {$shu+=(ord($linshi)-48)*pow($jinzhi,strlen($zifu)-$i-1); }else{ $shu=$shu + (ord($linshi)-55)*pow($jinzhi,strlen($zifu)-$i-1);} break; case 62: if (ord($linshi)=57) {$shu+=$linshi*pow($jinzhi,strlen($zifu)-$i-1); }elseif ((ord($linshi)>=65) && (ord($linshi)=90)){ $shu+= (ord($linshi)-55)*pow($jinzhi,strlen($zifu)-$i-1); }else{ $shu+= (ord($linshi)-61)*pow($jinzhi,strlen($zifu)-$i-1);} break; } } return $shu; } //10进制高精度转换2、8、16、36、62进制 function jinzhih_G0($shu,$jinzhi,$w) { $zifu = ""; while ($shu!=0){ $linshi = bcmod($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) { $zifu.= chr(($linshi+55)); }else{ $zifu.= $linshi;} break; case 62: if (($linshi>=10) && ($linshi36)) {$zifu.= chr($linshi+55);break;} if (($linshi>=36) && ($linshi62)) {$zifu.= chr($linshi+61);break;} $zifu.= $linshi;break; default: $zifu.= $linshi; break; } $shu = intval(bcp($shu,$jinzhi)); } for ($i=strlen($zifu);$i$w;$i++) $zifu.="0"; return strrev($zifu);} //2、8、16、36、62进制高精度转换10进制 function jinzhih_G1($zifu,$jinzhi,$w) { $shu= ""; for ($i=0;$i=strlen($zifu)-1;$i++) { $linshi = substr($zifu,$i,1); switch ($jinzhi){ case 2: $shu = bindec($zifu); $i=strlen($zifu)+1; break; case 8: $shu = octdec($zifu); $i=strlen($zifu)+1; break; case 16: $shu = hexdec($zifu); $i=strlen($zifu)+1; break; case 36: if (ord($linshi)=57) {$shu=bcadd($shu,bcmul((ord($linshi)-48),bcpow($jinzhi,strlen($zifu)-$i-1))); }else{ $shu=bcadd($shu,bcmul((ord($linshi)-55),bcpow($jinzhi,strlen($zifu)-$i-1)));} break; case 62: if (ord($linshi)=57) {$shu=bcadd($shu,bcmul($linshi,bcpow($jinzhi,strlen($zifu)-$i-1))); }elseif ((ord($linshi)>=65) && (ord($linshi)=90)){ $shu=bcadd($shu,bcmul((ord($linshi)-55),bcpow($jinzhi,strlen($zifu)-$i-1))); }else{ $shu=bcadd($shu,bcmul((ord($linshi)-61),bcpow($jinzhi,strlen($zifu)-$i-1))); } break; } } return $shu;} } if (isset($_GET["p"])) {if ($_GET["p"]==="1"){ echo ""; echo "提示： "; echo "32进制低精转换，最大值：2147483646 "; echo "32进制高精转换，最大值：77309411327 "; echo "64进制高精转换，最大值：133143986175 "; echo ""; echo "值为："; $Fs = new jinzhi_class(); if ($_POST['lx']=="0" && $_POST['jinzhi0']=="10") {echo $Fs->jinzhih_0($_POST['zhi'],$_POST['jinzhi1'],$_POST['changdu'])." ";} if ($_POST['lx']=="1" && $_POST['jinzhi0']=="10") {echo $Fs->jinzhih_G0($_POST['zhi'],$_POST['jinzhi1'],$_POST['changdu']);} if ($_POST['lx']=="0" && $_POST['jinzhi0']>"10") {echo $Fs->jinzhih_1($_POST['zhi'],$_POST['jinzhi0'],$_POST['changdu']);} if ($_POST['lx']=="1" && $_POST['jinzhi0']>"10") {echo $Fs->jinzhih_G1($_POST['zhi'],$_POST['jinzhi0'],$_POST['changdu']);} } echo "";} $mtime1 = explode(" ", microtime()); $endTime = $mtime1[0] + $mtime1[1]; printf ("页面执行时间：%.6fs.",$endTime-$startTime); ?></pre><p></p> <p>以上就是本文的全部内容，希望对大家的学习有所帮助。</p> <p>相关推荐：</p> <p><a href="http://www.php.cn/php-weizijiaocheng-398300.html" target="_blank">文本文件和二<span style="color:#f01414;">进制</span>文件的区别</a><br></p> <p><a href="http://www.php.cn/js-tutorial-397942.html" target="_blank">Ajax发送和接收二<span style="color:#f01414;">进制</span>字节流数据的方法</a><br></p> <p><a href="http://www.php.cn/php-weizijiaocheng-397865.html" target="_blank">PHP实现十<span style="color:#f01414;">进制</span>、二<span 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