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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。
  */

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

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

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(&#39;1&#39;,3,&#39;0&#39;) 
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=&#39;1&#39;) {   
$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; }

 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)!


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