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Homephp教程php手册PHP的substr_replace将指定两位置之间的字符替换为*号

PHP的substr_replace将指定两位置之间的字符替换为*号的代码,需要的朋友可以参考下。

代码如下:
$username = "zongzi";
echo substr_replace($username,'**','1','2');

定义和用法

substr_replace() 函数把字符串的一部分替换为另一个字符串。

语法

substr_replace(string,replacement,start,length)

提示和注释

如果 start 是负数且 length 小于等于 start,则 length 为 0。
例子
代码如下:
echo substr_replace("Hello world","earth",6);
?>

输出:
Hello earth

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