PHP update MySQL After the method of changing the number of rows, MySQL line number
The example in this article describes how to get a change in the number of rows after PHP updates mysql. Share to everyone for your reference. The specific analysis is as follows:
A php update MySQL to get the number of changed rows, in PHP to provide MySQL function to get the last execution of the query affected by the number of records: Mysql_affected_rows (), return the most recent insert,update or DELETE associated with the connection handle The number of record rows affected by the query. Found_rows (): Select Row_count (): Update delete insert.
Here is the main content of the article description, the code is as follows:
Copy the Code code as follows: Found_rows (): Select
Row_count (): UPDATE Delete Insert
Note: You need to work with the appropriate operation, otherwise the returned value is only 1 and 1 (both are incorrect values)
The
PHP sample code is as follows:
Copy code code as follows: Drop database if exists ' mytest ';
CREATE database ' mytest ';
use ' mytest ';
drop table if exists ' mytesttable ';
CREATE TABLE ' mytesttable ' (' ID ' int, ' Name ' varchar (10));
INSERT INTO ' mytesttable ' (' ID ', ' Name ')
Select ' 1 ', ' role1 ' union ALL
Select ' 2 ', ' role2 ' union ALL
Select ' 3 ', ' role3 ';
Select Row_count ();--Output 3 (returns the number of newly added records), [Note: If using insert Into...values only returns 1]
Select * from ' mytesttable '; Select found _rows (); --Output 3 (returns the number of rows selected)
Update ' mytesttable ' set ' Name ' = ' people '; select Row_count ();--Output 3 (returns the number of modified rows)
Delete from ' Mytestt Able '; select Row_count (); --Output 3 (returns the number of deleted rows)
The number of rows affected by PHP update MySQL has been resolved with an exception, the code is as follows:
Copy code code as follows: function Mysql_modified_rows () {
$info _str = Mysql_info ();
$a _rows = Mysql_affected_rows ();
Ereg ("Rows matched: ([0-9]*)", $info _str, $r _matched);
Return ($a _rows < 1)? ($r _matched[1]? $r _matched[1]:0): $a _rows;
}
I hope this article is helpful to everyone's PHP programming.
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