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is_string
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is_string

Name

is_string — Tests whether a value is a string.

Synopsis

bool is_string(value); mixed value: Value or variable to test

Returns

TRUE if the value is a string; FALSE otherwise

Description

is_string() checks whether value is a string. If so, the function returns TRUE. If not, FALSE is returned.

Version

PHP Version: 3+, 4+

Example

Example 1400. Test whether a value is a string

// The quotes around the number force the value to be a string
$value = '99';

if (is_string ($value))
    print "Value \$value is a string.";
else
    print "Value \$value is not a string.";

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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 http://www.opencontent.org/openpub/). The authors of this book have elected not to choose any options under the OPL. This online book was obtained from http://www.fooassociates.com/phpfer/ 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.