Php 使用preg_replace替换双引号之间的逗号

我有一个像这样的csv文件

Number,Name,UG College,UG University,PG College,PG University
1100225,Lakshmin,pkrrrr College,"PKRRRRR University, Choice",nandhaaaaa,"Nandhaa University, Kumali"

在读取文件时，我只想在双引号内替换逗号

---

提前感谢。

它假设字符串采用什么编码？preg函数得到了一个

u

修饰符来设置UTF8，请参见其他函数是binary-safecreate\u。php 7.2中的函数不推荐使用。有什么解决办法吗？先谢谢你

$string = '1100225,Lakshmin,pkrrrr College,"PKRRRRR University, Choice",nandhaaaaa,"Nandhaa University, Kumali"';

$string = preg_replace_callback(
        '|"[^"]+"|',
        create_function(
            // single quotes are essential here,
            // or alternative escape all $ as \$
            '$matches',
            'return str_replace(\',\',\'*comma*\',$matches[0]);'
        ),$string );
$array = explode(',',$string);
$array = str_replace('*comma*',',',$array);
print_r($array);       
exit;