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php基于str_pad实现卡号不足位数自动补0的方法，str_pad卡号_PHP教程

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Release： 2016-07-13 10:14:06
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php基于str_pad实现卡号不足位数自动补0的方法，str_pad卡号

自动补足空白位数在php中str_pad函数可以帮我们实现哦，str_pad() 函数把字符串填充为指定的长度。

str_pad() 函数把字符串填充为指定的长度。
语法
str_pad(string,length,pad_string,pad_type)

参数 描述
string 必需。规定要填充的字符串。
length 必需。规定新字符串的长度。如果该值小于原始字符串的长度，则不进行任何操作。
pad_string 可选。规定供填充使用的字符串。默认是空白。
pad_type

可选。规定填充字符串的那边。

可能的值：

  • STR_PAD_BOTH - 填充到字符串的两头。如果不是偶数，则右侧获得额外的填充。
  • STR_PAD_LEFT - 填充到字符串的左侧。
  • STR_PAD_RIGHT - 填充到字符串的右侧。这是默认的。

示例如下：
复制代码 代码如下:
$cardCount = 10;
$arr = array();
for ($i = 1; $i $strCard = str_pad($i, 10, '0', STR_PAD_LEFT);
$arr[] = $strCard;
}
print_r($arr);

运行后输出结果如下：
复制代码 代码如下:

Array ( [0] => 0000000001 [1] => 0000000002 [2] => 0000000003 [3] => 0000000004 [4] => 0000000005 [5] => 0000000006 [6] => 0000000007 [7] => 0000000008 [8] => 0000000009 [9] => 0000000010 )

希望本文所述对大家的PHP程序设计有所帮助。

www.bkjia.comtruehttp://www.bkjia.com/PHPjc/910602.htmlTechArticlephp基于str_pad实现卡号不足位数自动补0的方法，str_pad卡号 自动补足空白位数在php中str_pad函数可以帮我们实现哦，str_pad() 函数把字符串填充...
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