可以實現：
10進位轉換2、8、16、36、62進位
2、8、16、36、62進位轉換10進位
有點要注意下，2、8、16進位轉換時，使用的是系統的自己的函數。
所以，不管怎麼高精度轉換值可能大於2147483646。
另外，
32進位低精轉換，最大值：2147483646；
32進位高精轉換，最大值：77309411327；
64進位高精轉換，最大值：133143986175。
jinzhi.php檔案，內建示範功能。
<?php$mtime1 = explode(" ", microtime());$startTime = $mtime1[0] + $mtime1[1];?><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312" /><title>進位轉換/title></head><body><form id="jzh" name="jinzhih" method="post" action=""><input name="go" type="hidden" value="100"><table width="482" border="1" cellpadding="0" cellspacing="0" bordercolor="#FFE8E8" bgcolor="#F4F8FB"> <tr> <td width="194"><select name="jinzhi0" id="jinzhi0"> <option value="2">2</option> <option value="8">8</option> <option value="10" selected="selected">10</option> <option value="16">16</option> <option value="36">36</option> <option value="62">62</option> </select>進位</td> <td width="275"><input name="zhi" type="text" id="zhi" /></td> </tr> <tr> <td>進行<input name="lx" type="radio" value="0" checked="checked" />普通<input type="radio" name="lx" value="1" />高精</td><td> </td> </tr> <tr> <td>轉換為 <select name="jinzhi1" id="jinzhi1"> <option value="2" selected="selected">2</option> <option value="8">8</option> <option value="10">10</option> <option value="16">16</option> <option value="36">36</option> <option value="62">62</option> </select>進位，</td><td>總長度為 <input name="changdu" type="text" id="changdu" value="10" size="4" maxlength="2" />字元。</td></tr><tr> <td><input type="submit" name="Submit" value="提交" /></td> <td><input type="reset" name="Submit2" value="重設" /></td> </tr></table> <p>注意：僅能進行10進位轉換為2、8、16、36、62進位；或反轉換。</p></form><?phpclass jinzhi_class{ //10進位轉2、8、16、36、62進位 function jinzhih_0($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進位轉10進位 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 $shu; } //10進位高精度轉換2、8、16、36、62進位 function jinzhih_G0($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; } $shu = intval(bcdiv($shu,$jinzhi)); } for ($i=strlen($zifu);$i$w;$i++) $zifu.="0"; return strrev($zifu);} //2、8、16、36、62進位高精度轉換10進位 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 ($_GET["p"]==="1"){echo "";echo "提示：";echo "32進位低精轉換，最大值：2147483646";echo "32進位高精轉換，最大值：77309411327";echo "64進位高精轉換，最大值：133143986175";echo "";echo "值為：";$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] + $mtime1[1];printf ("頁面執行時間：%.6fs.",$endTime-$startTime);?>
希望本文所述對大家PHP程式設計有所協助。
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