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)
- <?php
- echo substr_replace("hello world","earth",6);
- ?>
参数 描述
string 必需,规定要检查的字符串。
replacement 必需,规定要插入的字符串。
start:必需,规定在字符串的何处开始替换。
正数 – 在第 start 个偏移量开始替换
负数 – 在从字符串结尾的第 start 个偏移量开始替换
0 – 在字符串中的第一个字符处开始替换
charlist:可选,规定要替换多少个字符。
正数 – 被替换的字符串长度
负数 – 从字符串末端开始的被替换字符数
0 – 插入而非替换
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波比源码 » php从指定位置开始替换字符方法
波比源码 » php从指定位置开始替换字符方法
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