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rawurlencode
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rawurlencode

Name

rawurlencode — URL-encodes a string according to RFC 1738.

Synopsis

string rawurlencode(data); string data: Data to be URL-encoded

Returns

RFC 1738 URL-encoded string; FALSE if the argument passed has no length when converted to a string

Description

rawurlencode() makes a string safe to use as part of a URL. It does this by encoding every character within the string that may be misinterpreted by a transport agent (such as an email server) or interpreted as a URI delimiter - for example, the at sign (@), hash (#), and question mark (?) symbols. This includes every character except A-Z, a-z, 0-9, underscore (ASCII value 95), and hyphen (ASCII value 45). Every other character, including accented letters, is converted into a three-digit escape sequence that consists of a literal percent (%) sign, followed by the character's ASCII value represented as two hexadecimal digits.

Spaces are converted to %20 - other encoders may convert a space to a plus (+) sign. The conversion of spaces to plus (+) signs for URL-encoded strings is discussed in section 8.2.1 of RFC 1866.

Version

PHP Version: 3+, 4+

Example

Example 1369. Show how rawurlencode() encodes characters

<table>
<tr>
 <th>Character</th>
</tr>
<tr>
 <th>ASCII value<br />(Oct/Dec/Hex)</th>
</tr>
<tr>
 <th>URL-encoded value</th>
</tr>
<?php
for ($ord = 1; $ord < 256; ++$ord) {
    $chr = chr ($ord);
    printf ('<tr align="center"><td>%s</td><td>0%o / %d / 0x%X</td><td>%s</td></tr>',
        $chr, $ord, $ord, $ord, rawurlencode ($chr));
}
?>
</table>

Example 1370. Encode a value in a hidden form field

<input type="hidden" name="host" value="<?php echo rawurlencode ($HTTP_HOST); ?>" />

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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.