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    SQLite3Stmt::bindValue

    (PHP 5 >= 5.3.0, PHP 7, PHP 8)

    SQLite3Stmt::bindValue — Binds the value of a parameter to a statement variable

    说明

    public SQLite3Stmt::bindValue(string|int $param, mixed $value, int $type = SQLITE3_TEXT): bool

    Binds the value of a parameter to a statement variable.

    警告

    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.

    参数

    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.

    value

    The value to bind to a statement variable.

    type

    The 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.

    注意:

    If value is null, it is always treated as SQLITE3_NULL, regardless of the given type.

    返回值

    Returns true if the value is bound to the statement variable, 或者在失败时返回 false.

    更新日志

    版本 说明
    7.4.0 param now also supports the @param notation.

    示例

    示例 #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));
    ?>

    以上示例会输出：

    array(1) {
  ["bar"]=>
  string(14) "This is a test"
}

    参见

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    User Contributed Notes 4 notes

    up
    30
    zeebinz at gmail dot com
    14 years ago
    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.
    up
    10
    andrevanzuydam at gmail dot com
    9 years ago
    I just want to say again,

    Numbering for parameters starts at ONE!

    This has caught me out quite a few times!
    up
    3
    bohwaz
    9 years ago
    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=68849

    Here is a simple function to help you make bindValue work correctly:

    <?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));
        }
    }
    ?>
    up
    1
    vaibhavatul47 at gmail dot com
    8 years ago
    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");
                    }
                }
    ?>
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