About the obsolete writing method in Query.php in the TP5 framework

This is a problem encountered when using the chain method to query the database in TP5:

The reason is that each chain method returns a Query object, and the $str {0} writing method in line 370 of Query.php is abandoned.

Change to substr($value ,0,1) as follows.

Error disappears:

Recommended related tutorials: "TP5"

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