PDO::quote

(no version information, might be only in CVS)

PDO::quote --  Quotes a string for use in a query.

Popis

string PDO::quote ( string string [, int parameter_type] )

Varovanie

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PDO::quote() places quotes around the input string and escapes and single quotes within the input string. Quoting input strings has been a common means of attempting to prevent SQL injection attacks; however, an even safer approach is to use prepared statements with named parameters or placeholders for the input values.

Not all PDO drivers implement this method.

Parametre

string

The string to be quoted.

parameter_type

Provides a data type hint for drivers that have alternate quoting styles. The default value is PDO_PARAM_STR.

Vrátené hodnoty

Returns a quoted string that is theoretically safe to pass into an SQL statement.

Príklady

Príklad 1. Quoting a normal string

<?php
$conn
= new PDO('sqlite:/home/lynn/music.sql3');

/* Simple string */
$string = 'Nice';
print
"Unquoted string: $string\n";
print
"Quoted string: " . $conn->quote($string) . "\n";
?>

V�stup pr�kladu uveden�ho vy�ie bude:

Unquoted string: Nice
Quoted string: 'Nice'

Príklad 2. Quoting a dangerous string

<?php
$conn
= new PDO('sqlite:/home/lynn/music.sql3');

/* Dangerous string */
$string = 'Naughty \' string';
print
"Unquoted string: $string\n";
print
"Quoted string:" . $conn->quote($string) . "\n";
?>

V�stup pr�kladu uveden�ho vy�ie bude:

Unquoted string: Naughty ' string
Quoted string: 'Naughty '' string'

Príklad 3. Quoting a complex string

<?php
$conn
= new PDO('sqlite:/home/lynn/music.sql3');

/* Complex string */
$string = "Co'mpl''ex \"st'\"ring";
print
"Unquoted string: $string\n";
print
"Quoted string: " . $conn->quote($string) . "\n";
?>

V�stup pr�kladu uveden�ho vy�ie bude:

Unquoted string: Co'mpl''ex "st'"ring
Quoted string: 'Co''mpl''''ex "st''"ring'

Tiež pozri

PDO::prepare()
PDOStatement::execute()