PHP regular rotation method for specifying special characters in key sub-lines

How does PHP replace special characters in the specified key sub-lines?
PHP wants to match
.....

..... This omits the rows in the same format as Connaught Dry.

The keyword in this line is Providername= "System.Data.SqlClient", and then to get rid of Charset=utf8;
The final result you want is



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Eregi (); Is this function OK?

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Preg_replace ('/(]*providername= "system\. Data\. SqlClient "[^>]*] Charset=utf8; ([^>]*>)/is ', ' $1$2 ', $s);
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Reference:

Eregi (); Is this function OK?

Eregi is the discarded function .... Don't indulge in the old version of PHP ....

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