Same name in other branches

1. 8.9.x core/lib/Drupal/Core/Database/Connection.php \Drupal\Core\Database\Connection::expandArguments()
2. 10 core/lib/Drupal/Core/Database/Connection.php \Drupal\Core\Database\Connection::expandArguments()
3. 11.x core/lib/Drupal/Core/Database/Connection.php \Drupal\Core\Database\Connection::expandArguments()

Expands out shorthand placeholders.

Drupal supports an alternate syntax for doing arrays of values. We therefore need to expand them out into a full, executable query string.

Parameters

string $query: The query string to modify.

array $args: The arguments for the query.

Return value

bool TRUE if the query was modified, FALSE otherwise.

Throws

\InvalidArgumentException This exception is thrown when:

• A placeholder that ends in [] is supplied, and the supplied value is not an array.
• A placeholder that does not end in [] is supplied, and the supplied value is an array.

1 call to Connection::expandArguments()

Connection::query in core/lib/Drupal/Core/Database/Connection.php

Executes a query string against the database.

File

core/lib/Drupal/Core/Database/Connection.php, line 1076

Class

Connection

Base Database API class.

Namespace

Drupal\Core\Database

Code

protected function expandArguments(&$query, &$args) {
    $modified = FALSE;
    // If the placeholder indicated the value to use is an array,  we need to
    // expand it out into a comma-delimited set of placeholders.
    foreach ($args as $key => $data) {
        $is_bracket_placeholder = substr($key, -2) === '[]';
        $is_array_data = is_array($data);
        if ($is_bracket_placeholder && !$is_array_data) {
            throw new \InvalidArgumentException('Placeholders with a trailing [] can only be expanded with an array of values.');
        }
        elseif (!$is_bracket_placeholder) {
            if ($is_array_data) {
                throw new \InvalidArgumentException('Placeholders must have a trailing [] if they are to be expanded with an array of values.');
            }
            // Scalar placeholder - does not need to be expanded.
            continue;
        }
        // Handle expansion of arrays.
        $key_name = str_replace('[]', '__', $key);
        $new_keys = [];
        // We require placeholders to have trailing brackets if the developer
        // intends them to be expanded to an array to make the intent explicit.
        foreach (array_values($data) as $i => $value) {
            // This assumes that there are no other placeholders that use the same
            // name.  For example, if the array placeholder is defined as :example[]
            // and there is already an :example_2 placeholder, this will generate
            // a duplicate key.  We do not account for that as the calling code
            // is already broken if that happens.
            $new_keys[$key_name . $i] = $value;
        }
        // Update the query with the new placeholders.
        $query = str_replace($key, implode(', ', array_keys($new_keys)), $query);
        // Update the args array with the new placeholders.
        unset($args[$key]);
        $args += $new_keys;
        $modified = TRUE;
    }
    return $modified;
}

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