이 기사의 예에서는 PHP 16진수 변환을 설명합니다. 참고를 위해 모든 사람과 공유하세요. 세부 사항은 다음과 같습니다.
달성 가능:
십진수 2, 8, 16, 36, 62로 변환
2 , 8, 16, 36, 62 십진수를 십진수로 변환
주의할 점은 2, 8, 16 십진수를 변환할 때 시스템 자체 함수를 사용한다는 점입니다.
따라서 아무리 고정밀도 변환값이 있어도 2147483646보다 클 수 있습니다.
추가로
32진수 저정밀도 변환, 최대값: 2147483646;
32진수 고정밀도 변환, 최대값: 77309411327
64진수 고정밀도 변환, 최대값: 값: 133143986175.
jinzhi.php 파일에는 데모 기능이 포함되어 있습니다.
<?php $mtime1 = explode(" ", microtime()); $startTime = $mtime1[0] + $mtime1[1]; ?> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title>进制转换/title> </head> <body> <form id="jzh" name="jinzhih" method="post" action=""> <input name="go" type="hidden" value="100"> <table width="482" border="1" cellpadding="0" cellspacing="0" bordercolor="#FFE8E8" bgcolor="#F4F8FB"> <tr> <td width="194"><select name="jinzhi0" id="jinzhi0"> <option value="2">2</option> <option value="8">8</option> <option value="10" selected="selected">10</option> <option value="16">16</option> <option value="36">36</option> <option value="62">62</option> </select> 进制</td> <td width="275"><input name="zhi" type="text" id="zhi" /></td> </tr> <tr> <td>进行<input name="lx" type="radio" value="0" checked="checked" /> 普通<input type="radio" name="lx" value="1" />高精</td><td> </td> </tr> <tr> <td>转换为 <select name="jinzhi1" id="jinzhi1"> <option value="2" selected="selected">2</option> <option value="8">8</option> <option value="10">10</option> <option value="16">16</option> <option value="36">36</option> <option value="62">62</option> </select>进制,</td><td>总长度为 <input name="changdu" type="text" id="changdu" value="10" size="4" maxlength="2" /> 字符。</td></tr><tr> <td><input type="submit" name="Submit" value="提交" /></td> <td><input type="reset" name="Submit2" value="重置" /></td> </tr></table> <p>注意:仅能进行10进制转换为2、8、16、36、62进制;或反转换。</p></form> <?php class jinzhi_class { //10进制转2、8、16、36、62进制 function jinzhih_0($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; } $shu = intval(bcdiv($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); ?>
이 기사가 PHP 프로그래밍에 종사하는 모든 사람에게 도움이 되기를 바랍니다.
더 많은 PHP 베이스 변환 예제 분석(2, 8, 16, 36, 64 베이스를 10 베이스로 변환) 관련 기사를 보려면 PHP 중국어 웹사이트를 주목하세요!