10-21-2008
Pick up the return code for every iteration and display the result only once in loop.
Hi All,
I amlearning UNIX scripting. I have a small query. I would be thankful if any one helps me out.
I have a below piece of code which delets the files. If file dosent have the permissions to delete a particular file I have used 2>>operator to track the error code.
But my objective is to check the return of 'rm' for every iteration.
Some thing like we should be picking up the return code, if its value is greater than 0 then you should set a flag to indicate that an error has occured.
The flag should be initialised to zero before the iterations begin. And the error message some thing like 'Atleast one file cannot be deleted'.
Example:-we need to remember using a flag (something like if [[ $? > 0 ]] then rm_errorflag=1). Need to use this in below piece of code
ls -l | { while read myline;
do
if [[ -f "$myline" && "$myline" != *.ksh ]]
then
echo "Removing " "$myline" >> temp
rm -f "$myline" 2>>temp
fi
done }
Please help me out in this.
Thanks for your time.
Regards,
Manas
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LEARN ABOUT PHP
mysqli_stmt_affected_rows
MYSQLI_STMT_AFFECTED_ROWS(3) 1 MYSQLI_STMT_AFFECTED_ROWS(3)
mysqli_stmt::$affected_rows - Returns the total number of rows changed, deleted, or inserted by the last executed statement
Object oriented style
SYNOPSIS
int$mysqli_stmt->affected_rows ()
DESCRIPTION
Procedural style
int mysqli_stmt_affected_rows (mysqli_stmt $stmt)
Returns the number of rows affected by INSERT, UPDATE, or DELETE query.
This function only works with queries which update a table. In order to get the number of rows from a SELECT query, use
mysqli_stmt_num_rows(3) instead.
PARAMETERS
o $
stmt -Procedural style only: A statement identifier returned by mysqli_stmt_init(3).
RETURN VALUES
An integer greater than zero indicates the number of rows affected or retrieved. Zero indicates that no records where updated for an
UPDATE/DELETE statement, no rows matched the WHERE clause in the query or that no query has yet been executed. -1 indicates that the query
has returned an error. NULL indicates an invalid argument was supplied to the function.
Note
If the number of affected rows is greater than maximal PHP int value, the number of affected rows will be returned as a string
value.
EXAMPLES
Example #1
Object oriented style
<?php
$mysqli = new mysqli("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s
", mysqli_connect_error());
exit();
}
/* create temp table */
$mysqli->query("CREATE TEMPORARY TABLE myCountry LIKE Country");
$query = "INSERT INTO myCountry SELECT * FROM Country WHERE Code LIKE ?";
/* prepare statement */
if ($stmt = $mysqli->prepare($query)) {
/* Bind variable for placeholder */
$code = 'A%';
$stmt->bind_param("s", $code);
/* execute statement */
$stmt->execute();
printf("rows inserted: %d
", $stmt->affected_rows);
/* close statement */
$stmt->close();
}
/* close connection */
$mysqli->close();
?>
Example #2
Procedural style
<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "world");
/* check connection */
if (mysqli_connect_errno()) {
printf("Connect failed: %s
", mysqli_connect_error());
exit();
}
/* create temp table */
mysqli_query($link, "CREATE TEMPORARY TABLE myCountry LIKE Country");
$query = "INSERT INTO myCountry SELECT * FROM Country WHERE Code LIKE ?";
/* prepare statement */
if ($stmt = mysqli_prepare($link, $query)) {
/* Bind variable for placeholder */
$code = 'A%';
mysqli_stmt_bind_param($stmt, "s", $code);
/* execute statement */
mysqli_stmt_execute($stmt);
printf("rows inserted: %d
", mysqli_stmt_affected_rows($stmt));
/* close statement */
mysqli_stmt_close($stmt);
}
/* close connection */
mysqli_close($link);
?>
The above examples will output:
rows inserted: 17
SEE ALSO
mysqli_stmt_num_rows(3), mysqli_prepare(3).
PHP Documentation Group MYSQLI_STMT_AFFECTED_ROWS(3)