What is PhpDig?
PhpDig is a PHP MySQL based
Web Spider & Search Engine.



chr — Gets the character for a given ASCII code.


string chr(ascii_code);
int ascii_code:


ASCII character; NULL if the given integer is not a valid ASCII code


chr() returns the character associated with the supplied ASCII code. If the integer provided is not a valid ASCII code, the function returns nothing.

Note that the integer can be specified in octal or hex values, as well as decimal. Octal values are denoted by a leading 0(07,012,...), while hex values are denoted by a leading0x(0xFF,0x9D,...).


PHP 3+, PHP 4+

See also

Other functions that deal with the ASCII value of a character:








Example 1192. Add a null byte to the end of a string

$string .= chr(0);

Example 1193. Find the character for a hex value

// Sesame Street for budding geeks
echo "The ASCII character code for today is 0x57...", chr(0x57);
The ASCII character code for today is 0x57...W

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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