Home php教程 PHP源码 PHP几种数字左侧自动补0

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。
  */
Copy after login

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
Copy after login

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
Copy after login

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; }
Copy after login

 以上就是PHP几种数字左侧自动补0的内容,更多相关内容请关注PHP中文网(www.php.cn)!


Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot Article Tags

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian Dec 24, 2024 pm 04:42 PM

PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian

CakePHP Date and Time CakePHP Date and Time Sep 10, 2024 pm 05:27 PM

CakePHP Date and Time

CakePHP Project Configuration CakePHP Project Configuration Sep 10, 2024 pm 05:25 PM

CakePHP Project Configuration

CakePHP File upload CakePHP File upload Sep 10, 2024 pm 05:27 PM

CakePHP File upload

CakePHP Routing CakePHP Routing Sep 10, 2024 pm 05:25 PM

CakePHP Routing

Discuss CakePHP Discuss CakePHP Sep 10, 2024 pm 05:28 PM

Discuss CakePHP

CakePHP Quick Guide CakePHP Quick Guide Sep 10, 2024 pm 05:27 PM

CakePHP Quick Guide

How To Set Up Visual Studio Code (VS Code) for PHP Development How To Set Up Visual Studio Code (VS Code) for PHP Development Dec 20, 2024 am 11:31 AM

How To Set Up Visual Studio Code (VS Code) for PHP Development

See all articles