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mysqli_real_escape_string

(PHP 5)

mysqli_real_escape_string

(no version information, might be only in CVS)

mysqli->real_escape_string -- Escapes special characters in a string for use in a SQL statement, taking into account the current charset of the connection

Description

Процедурный стиль:

string mysqli_real_escape_string ( mysqli link, string escapestr )

Объектно-ориентированный стиль (method):

class mysqli {
string real_escape_string ( string escapestr )
}

This function is used to create a legal SQL string that you can use in a SQL statement. The string escapestr is encoded to an escaped SQL string, taking into account the current character set of the connection.

Characters encoded are NUL (ASCII 0), \n, \r, \, ', ", and Control-Z.

Возвращаемые значения

Returns an escaped string.

Примеры

Пример 1. Объектно-ориентированный стиль


<?php

$mysqli 
= new 
mysqli
(
"localhost"
, 
"my_user"
, 
"my_password"
, 
"world"
);




/* check connection */


if (
mysqli_connect_errno
()) {

    
printf
(
"Connect failed: %s\n"
, 
mysqli_connect_error
());

    exit();

}




$mysqli
->
query
(
"CREATE TEMPORARY TABLE myCity LIKE City"
);




$city 
= 
"'s Hertogenbosch"
;




/* this query will fail, cause we didn't escape $city */


if (!
$mysqli
->
query
(
"INSERT into myCity (Name) VALUES ('$city')"
)) {

    
printf
(
"Error: %s\n"
, 
$mysqli
->
sqlstate
);

}




$city 
= 
$mysqli
->
real_escape_string
(
$city
);




/* this query with escaped $city will work */


if (
$mysqli
->
query
(
"INSERT into myCity (Name) VALUES ('$city')"
)) {

    
printf
(
"%d Row inserted.\n"
, 
$mysqli
->
affected_rows
);

} 




$mysqli
->
close
();


?>

Пример 2. Процедурный стиль


<?php

$link 
= 
mysqli_connect
(
"localhost"
, 
"my_user"
, 
"my_password"
, 
"world"
);




/* check connection */


if (
mysqli_connect_errno
()) {

    
printf
(
"Connect failed: %s\n"
, 
mysqli_connect_error
());

    exit();

}




mysqli_query
(
$link
, 
"CREATE TEMPORARY TABLE myCity LIKE City"
);




$city 
= 
"'s Hertogenbosch"
;




/* this query will fail, cause we didn't escape $city */


if (!
mysqli_query
(
$link
, 
"INSERT into myCity (Name) VALUES ('$city')"
)) {

    
printf
(
"Error: %s\n"
, 
mysqli_sqlstate
(
$link
));

}




$city 
= 
mysqli_real_escape_string
(
$link
, 
$city
);




/* this query with escaped $city will work */


if (
mysqli_query
(
$link
, 
"INSERT into myCity (Name) VALUES ('$city')"
)) {

    
printf
(
"%d Row inserted.\n"
, 
mysqli_affected_rows
(
$link
));

} 




mysqli_close
(
$link
);


?>

Результат выполнения данного примера:

Error: 42000
1 Row inserted.

Все функции PHP:

mysqli_real_escape_string

Description

Возвращаемые значения

Смотрите также

Примеры