URL functions

URL functions

parse_url

Name

parse_url — parse a URL and return its components

Description

array parse_url(string url);

Returns: This function returns an associative array returning any of the various components of the URL that are present. This includes the "scheme", "host", "port", "user", "pass", "path", "query", and "fragment".

urldecode

Name

urldecode — decodes URL-encoded string

Description

string urldecode(string str);

Decodes any %## encoding in the given string. The decoded string is returned.

Example 1. urldecode() example

$a = split ('&', $querystring);

$i = 0;

while ($i < count ($a)) {

$b = split ('=', $a [$i]);

echo 'Value for parameter ', htmlspecialchars (urldecode ($b [0])), ' is ', htmlspecialchars (urldecode ($b [1])), "<BR>";

$i++;

}

See also urlencode

urlencode

Name

urlencode — URL-encodes string

Description

string urlencode(string str);

Returns a string in which all non-alphanumeric characters except -_. have been replaced with a percent (%) sign followed by two hex digits and spaces encoded as plus (+) signs. It is encoded the same way that the posted data from a WWW form is encoded, that is the same way as in application/x-www- form-urlencoded media type. This differs from the RFC1738 encoding (see rawurlencode ) in that for historical reasons, spaces are encoded as plus (+ ) signs. This function is convenient when encoding a string to be used in a query part of an URL, as a convinient way to pass variables to the next page:

Example 1. urlencode() example

echo '<A HREF="mycgi?foo=', urlencode ($userinput), '">';

See also urldecode

base64_encode

Name

base64_encode — encodes data with MIME base64

Description

string base64_encode(string data);

base64_encode returns data encoded with base64. This encoding is designed to make binary data survive transport through transport layers that are not 8-bit clean, such as mail bodies.

Base64-encoded data takes about 33% more space than the original data. See also: base64_decode, RFC-2045 section 6.8.

base64_decode

Name

base64_decode — decodes data encoded with MIME base64

Description

string base64_decode(string encoded_data);

base64_decode decodes encoded_data and returns the original data. The returned data may be binary.

See also: base64_encode, RFC-2045 section 6.8.