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php中str_pad()函数用法的详细介绍

黄舟
Release： 2023-03-07 07:08:02
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这篇文章主要介绍了php中str_pad()函数用法,较为详细的分析了php中str_pad()函数的功能、参数含义及具体使用方法,需要的朋友可以参考下

本文实例讲述了php中str_pad()函数用法。分享给大家供大家参考，具体如下：

str_pad() 函数把字符串填充为新的长度。

语法：

str_pad(string，ength，pad_string，pad_type);

参数列表：

参数描述
string必需。规定要填充的字符串。
length必需。规定新的字符串长度。如果该值小于字符串的原始长度，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。规定填充字符串的哪边。可能的值：STR_PAD_BOTH - 填充字符串的两侧。如果不是偶数，则右侧获得额外的填充。STR_PAD_LEFT - 填充字符串的左侧。STR_PAD_RIGHT - 填充字符串的右侧。默认。


For example:

class test{
 private $var;
 public function construct($var){
 $this->var=$var;
 }
 public function test(){
 $result=str_pad($this->var,30,"*");
 return $result;
 }
}
$T=new test("hello");
$result=$T->test();
echo $result;
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output:

hello*************************
Copy after login

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