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PDO->quote()
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PDO->quote()

(no version information, might be only in CVS)

PDO->quote() --  Quotes a string for use in a query.

Popis

class PDO {

string quote ( string string [, int parameter_type] )

}

PDO->quote() places quotes around the input string (if required) and escapes special characters within the input string, using a quoting style appropriate to the underlying driver.

If you are using this function to build SQL statements, you are strongly recommended to use PDO->prepare() to prepare SQL statements with bound parameters instead of using PDO->quote() to interpolate user input into a SQL statement. Prepared statements with bound parameters are not only more portable, more convenient, immune to SQL injection, but are often much faster to execute than interpolated queries, as both the server and client side can cache a compiled form of the query.

Not all PDO drivers implement this method (notably PDO_ODBC). Consider using prepared statements instead.

Seznam parametrů

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.

Návratové hodnoty

Returns a quoted string that is theoretically safe to pass into an SQL statement. Returns FALSE if the driver does not support quoting in this way.

Příklady

Příklad 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";
?>

Výše uvedený příklad vypíše:

Unquoted string: Nice
Quoted string: 'Nice'

Příklad 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";
?>

Výše uvedený příklad vypíše:

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

Příklad 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";
?>

Výše uvedený příklad vypíše:

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

Viz také

PDO->prepare()
PDOStatement->execute()

PředcházejícíDomůDalší
PDO->query()Nahoru