(PHP 5 >= 5.3.0, PHP 7, PHP 8)
SQLite3Stmt::bindValue — Binds the value of a parameter to a statement variable
Binds the value of a parameter to a statement variable.
Before PHP 7.2.14 and 7.3.0, respectively, once the statement has been executed, SQLite3Stmt::reset() needs to be called to be able to change the value of bound parameters.
param
Either a string (for named parameters) or an int
(for positional parameters) identifying the statement variable to which the
value should be bound.
If a named parameter does not start with a colon (:) or an
at sign (@), a colon (:) is automatically preprended.
Positional parameters start with 1.
valueThe value to bind to a statement variable.
typeThe data type of the value to bind.
SQLITE3_INTEGER: The value is a signed integer,
stored in 1, 2, 3, 4, 6, or 8 bytes depending on the magnitude of
the value.
SQLITE3_FLOAT: The value is a floating point
value, stored as an 8-byte IEEE floating point number.
SQLITE3_TEXT: The value is a text string, stored
using the database encoding (UTF-8, UTF-16BE or UTF-16-LE).
SQLITE3_BLOB: The value is a blob of data, stored
exactly as it was input.
SQLITE3_NULL: The value is a NULL value.
As of PHP 7.0.7, if type is omitted, it is automatically
detected from the type of the value: bool
and int are treated as SQLITE3_INTEGER,
float as SQLITE3_FLOAT, null
as SQLITE3_NULL and all others as SQLITE3_TEXT.
Formerly, if type has been omitted, it has defaulted
to SQLITE3_TEXT.
Nota:
If
valueisnull, it is always treated asSQLITE3_NULL, regardless of the giventype.
Returns true if the value is bound to the statement variable, o false in caso di fallimento.
| Versione | Descrizione |
|---|---|
| 7.4.0 |
param now also supports the @param
notation.
|
Example #1 SQLite3Stmt::bindValue() example
<?php
$db = new SQLite3(':memory:');
$db->exec('CREATE TABLE foo (id INTEGER, bar STRING)');
$db->exec("INSERT INTO foo (id, bar) VALUES (1, 'This is a test')");
$stmt = $db->prepare('SELECT bar FROM foo WHERE id=:id');
$stmt->bindValue(':id', 1, SQLITE3_INTEGER);
$result = $stmt->execute();
var_dump($result->fetchArray(SQLITE3_ASSOC));
?>Il precedente esempio visualizzerà:
array(1) {
["bar"]=>
string(14) "This is a test"
}
Note that this also works with positional placeholders using the '?' token:<?php$stmt = $db->prepare('SELECT * FROM mytable WHERE foo = ? AND bar = ?');$stmt->bindValue(1, 'somestring', SQLITE3_TEXT);$stmt->bindValue(2, 42, SQLITE3_INTEGER);?>Positional numbering starts at 1.I just want to say again, Numbering for parameters starts at ONE!This has caught me out quite a few times!It might be a good idea to feed bindValue the type of the variable manually, or you might encounter weird stuff as the passed value is often treated as SQLITE3_TEXT and results in buggy queries.For example:<?php$st = $db->prepare('SELECT * FROM test WHERE (a+1) = ?');$st->bindValue(1, 2);?>Will never return any result as it is treated by SQLite as if the query was 'SELECT * FROM test WHERE (a+1) = "2"'. Instead you have to set the type manually:<?php$st = $db->prepare('SELECT * FROM test WHERE (a+1) = ?');$st->bindValue(1, 2, \SQLITE3_INTEGER);?>And it will work. This bug is reported in https://bugs.php.net/bug.php?id=68849Here is a simple function to help you make bindValue work correctly:<?phpfunction getArgType($arg){ switch (gettype($arg)) { case 'double': return SQLITE3_FLOAT; case 'integer': return SQLITE3_INTEGER; case 'boolean': return SQLITE3_INTEGER; case 'NULL': return SQLITE3_NULL; case 'string': return SQLITE3_TEXT; default: throw new \InvalidArgumentException('Argument is of invalid type '.gettype($arg)); }}?>I used following logic to prepare statements, It handles both Values and Arrays ( taking help from bohwaz note) :<?php function getArgType($arg) { switch (gettype($arg)) { case 'double': return SQLITE3_FLOAT; case 'integer': return SQLITE3_INTEGER; case 'boolean': return SQLITE3_INTEGER; case 'NULL': return SQLITE3_NULL; case 'string': return SQLITE3_TEXT; default: throw new \InvalidArgumentException('Argument is of invalid type '.gettype($arg)); } }foreach ($params as $index => $val) { // indexing start from 1 in Sqlite statement if (is_array($val)) { $ok = $stmt->bindParam($index + 1, $val); } else { $ok = $stmt->bindValue($index + 1, $val, getArgType($val)); } if (!$ok) { throw new Exception("Unable to bind param: $val"); } }?>