mysqli::real_connect
mysqli::real_query
MySQLi
PHP Manual

# mysqli::real_escape_string

# mysqli_real_escape_string

(PHP 5)

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

### Beschreibung

Objektorientierter Stil

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

Prozeduraler Stil

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.

### Parameter-Liste

`link`

  Nur bei prozeduralem Aufruf: Ein von mysqli_connect() oder mysqli_init() zurückgegebenes Verbindungsobjekt.

`escapestr`

  The string to be escaped.

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

### Rückgabewerte

Returns an escaped string.

### Beispiele

Beispiel #1 mysqli::real_escape_string example

Objektorientierter Stil

`<?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();
?>`

Prozeduraler Stil

`<?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);
?>`

The above examples will output:

    Error: 42000
    1 Row inserted.

### Siehe auch

- mysqli_character_set_name() - Returns the default character set for the database connection

mysqli::real_connect
mysqli::real_query
MySQLi
PHP Manual