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settype — Converts a variable to a given type.


bool settype($variable, type);
mixed $variable: Variable to be converted
string type: Name of type to be converted to


TRUE if the given variable can be converted to the given type; FALSE if the type argument is not a valid type name


settype() converts a variable to the specified type . If the type parameter is not a valid type name, the conversion fails and the function returns FALSE.


PHP Version: 3+, 4+

See also

To find the type of a variable:



Example 1406. Basic use of settype()

$title = '1001 Arabian Nights';
settype ($title, 'integer')
    or die ('Could not convert $title from type <i>string</i> to type <i>integer</i>');
print $title;

Example 1407. Show how setting the type modifies the value of a variable

// Make a small class for testing purposes
class test {
    var $foo = 'bar';

// Make a list of types to convert a variable to
$types  = array ("integer", "double", "string", "array", "object");

// Make a list of values to convert
$values = array (1, 1.1, "Hi", array (1, "dos"), new test (), opendir ('.'));

// Loop through each of the values
foreach ($values as $value) {
    print 'Original Value: ';
    print_r ($value);
    print "\nOriginal Type : " . gettype ($value);
    print '<blockquote>';

    // Loop through each of the types
    // and convert the value to the current type
    foreach ($types as $type) {
        $temp = $value;
        settype ($temp, $type);

        print "<tt>settype(\$value, '$type')</tt> converts <tt>$value</tt> to: <blockquote>";
        var_dump ($temp);
        print '</blockquote><br />';
    print '</blockquote>';

PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing (Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch). This material may be distributed only subject to the terms and conditions set forth in the Open Publication License, v1.0 or later (the latest version is presently available at The authors of this book have elected not to choose any options under the OPL. This online book was obtained from and is designed to provide information about the PHP programming language, focusing on PHP version 4.0.4 for the most part. The information is provided on an as-is basis, and no warranty or fitness is implied. All persons and entities shall have neither liability nor responsibility to any person or entity with respect to any loss or damage arising from the information contained in this book.

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