MySQLi
PHP Manual

mysqli::real_escape_string

mysqli_real_escape_string

(PHP 5)

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

Описание

Object oriented style (both methods are equivalent):

string mysqli::escape_string ( string $escapestr )
string mysqli::real_escape_string ( string $escapestr )

Procedural style:

string mysqli_real_escape_string ( mysqli $link , string $escapestr )

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

Параметри

link

Само за процедурния стил: Идентификатор на връзката върнат от mysqli_connect() или mysqli_init()

escapestr

The string to be escaped.

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

Връщани стойности

Returns an escaped string.

Примери

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\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();
?>

Example #2 Procedural style

<?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);
?>

Примерът по-горе ще изведе:

Error: 42000
1 Row inserted.

Вж. също


MySQLi
PHP Manual