DB_common::quoteSmart()

Description

Format input so it can be safely used as a literal in a query. Literals are values such as strings or numbers which get utilized in places like WHERE, SET and VALUES clauses of SQL statements.

The format returned depends on the PHP data type of input and the database type being used.

Parameter

Return value

mixed - the formatted data

The format of the results depends on the input's PHP type:

• input -> returns

• NULL -> the string NULL

• integer or float -> the unquoted number

• boolean -> output depends on the driver in use

  Most drivers return integers: 1 if true or 0 if false. Some return strings: TRUE if true or FALSE if false. Finally one returns strings: T if true or F if false. Here is a list of each DBMS, the values returned and the suggested column type:

  • dbase -> T/F (Logical)

  • fbase -> TRUE/FALSE (BOOLEAN)

  • ibase -> 1/0 (SMALLINT) [1]

  • ifx -> 1/0 (SMALLINT) [1]

  • msql -> 1/0 (INTEGER)

  • mssql -> 1/0 (BIT)

  • mysql -> 1/0 (TINYINT(1))

  • mysqli -> 1/0 (TINYINT(1))

  • oci8 -> 1/0 (NUMBER(1))

  • odbc -> 1/0 (SMALLINT) [1]

  • pgsql -> TRUE/FALSE (BOOLEAN)

  • sqlite -> 1/0 (INTEGER)

  • sybase -> 1/0 (TINYINT(1))

  [1] Accommodate the lowest common denominator because not all versions of have BOOLEAN.

• other (including strings and numeric strings) -> the data with single quotes escaped by preceeding single quotes, backslashes are escaped by preceeding backslashes, then the whole string is encapsulated between single quotes

Note

This function can not be called statically.

Function available since: Release 1.6.0

Example

<?php
// Once you have a valid DB object named $db...
$name   = "all's well";
$active = true;
$sql    = 'SELECT * FROM clients WHERE name = '
          . $db->quoteSmart($name)
          . ' AND active = '
          . $db->quoteSmart($active);

$result =& $db->query($sql);
?>

See

quoteIdentifier(), escapeSimple()