PHP几种数字左侧自动补0
May 25, 2016 pm 05:12 PM
php
PHP几种数字左侧自动补0
举例来说:员工的工号
X001
虽然
MySQL 本身的字段设定成 zerofill 的属性时,会将不足位数的部份补上0,但是这个功能只能用在数字的字段上面。 所以必要的时候只好靠PHP来进行了。
<?php $sourceNumber = "1"; $newNumber = substr(strval($sourceNumber+1000),1,3); echo "$newNumber"; ?> /*这个时候就会出现:001 如果要增加位数的话可以将1000加大,然后把3也加大。 举例:如果我要补上 "4个0" 第03行 就要变成这样。 */
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2. [代码][PHP]代码
<?php $newNumber = substr(strval($sourceNumber+100000),1,5); ?> /*其实就是总共要显示几位数字,就把$sourceNumber+1后面补上多少个0,最后一个数字就直接改成显示几位
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3. [代码][PHP]代码
/*string str_pad ( string $input, int $pad_length [, string $pad_string [, int $pad_type]] )*/ <?php $input = "Alien"; echo str_pad($input, 10); // produces "Alien " echo str_pad($input, 10, "-=", STR_PAD_LEFT); // produces "-=-=-Alien" echo str_pad($input, 10, "_", STR_PAD_BOTH); // produces "__Alien___" echo str_pad($input, 6 , "___"); // produces "Alien_" ?> /*补齐字符串的长度.以pad_string 补.默认
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4. [代码][PHP]代码
/* 你上面的方法我觉得不怎么好,介绍一下我写的一个方法。方法函数如下,这样当你要的结果001的话, 方法:dispRepair('1',3,'0') 功能:补位函数 str:原字符串 type:类型,0为后补,1为前补 len:新字符串长度 msg:填补字符 */ function dispRepair($str,$len,$msg,$type='1') { $length = $len - strlen($str); if($length<1)return $str; if ($type == 1) { $str = str_repeat($msg,$length).$str; } else { $str .= str_repeat($msg,$length); } return $str; }
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