Home>Article>Backend Development> PHP fills the string with the new length function str_pad()
Example
Padding the right side ofstringto a new length of 20 characters:
Definition and usage
str_pad()FunctionFill the string to the new length.
Syntax
str_pad(string,length,pad_string,pad_type)
Parameters | Description |
string | Required. Specifies the string to be filled. |
length | Required. Specifies the length of the new string. If the value is less than the length of the original string, no operation is performed. |
pad_string | Optional. Specifies the string used for padding. The default is blank. |
pad_type | Optional. Specifies which side of the string to fill. Possible values:
|
技术细节
返回值: 返回被填充的字符串。
PHP 版本: 4.0.1+
更多实例
实例 1
填充字符串的左侧:
实例 2
填充字符串的两侧:
顾名思义这个函数是针对字符串来说的这个可以对指定的字符串填补任何其它的字符串
例如:str_pad(带填补的字符串,填补后的长度,填补字符串,填补位置)
其中填补后的长度必须是个正整数,填补位置有三个选项,
左边:STR_PAD_LEFT,
右边:STR_PAD_RIGHT,
两端:STR_PAD_BOTH
例如:
string str_pad( string input, int pad_length [, string pad_string [, int pad_type]] ) echo str_pad(1,8,”0″,STR_PAD_LEFT);
结果:
00000001
echo str_pad(1,8,”0″,STR_PAD_RIGHT);
结果:
10000000
echo str_pad(1,8,”0″,STR_PAD_BOTH);
结果:
00010000
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