The Zend_Uri::check() method can only be used if validation
of an existing URI is needed.
Example 967. URI Validation with Zend_Uri::check()
<?php
// Validate whether a given URI is well formed
$valid = Zend_Uri::check('http://uri.in.question');
// $valid is TRUE for a valid URI, or FALSE otherwise.
Zend_Uri::check() returns a boolean, which is more convenient
than using Zend_Uri::factory() and catching the exception.
By default, Zend_Uri will not accept the following
characters: "{", "}", "|", "\", "^", "`". These characters are
defined by the RFC as "unwise" and invalid; however, many
implementations do accept these characters as valid.
Zend_Uri can be set to accept these "unwise" characters by
setting the 'allow_unwise' option to boolean TRUE using
Zend_Uri::setConfig():
Example 968. Allowing special characters in URIs
<?php
// Contains '|' symbol
// Normally, this would return false:
$valid = Zend_Uri::check('http://example.com/?q=this|that');
// However, you can allow "unwise" characters
Zend_Uri::setConfig(array('allow_unwise' => true));
// will return 'true'
$valid = Zend_Uri::check('http://example.com/?q=this|that');
// Reset the 'allow_unwise' value to the default FALSE
Zend_Uri::setConfig(array('allow_unwise' => false));
Note
Zend_Uri::setConfig() sets configuration options
globally. It is recommended to reset the 'allow_unwise' option to
'FALSE', like in the example above, unless you are certain
you want to always allow unwise characters globally.