If it's inconvenient to load a given validation class and create an
instance of the validator, you can use the static method
Zend_Validate::is() as an alternative invocation
style. The first argument of this method is a data input value,
that you would pass to the isValid() method. The
second argument is a string, which corresponds to the basename of
the validation class, relative to the Zend_Validate
namespace. The is() method automatically loads the
class, creates an instance, and applies the isValid()
method to the data input.
<?php
if (Zend_Validate::is($email, 'EmailAddress')) {
// Yes, email appears to be valid
}
You can also pass an array of constructor arguments, if they are needed for the validator.
<?php
if (Zend_Validate::is($value, 'Between', array('min' => 1, 'max' => 12))) {
// Yes, $value is between 1 and 12
}
The is() method returns a boolean value, the same as
the isValid() method. When using the static
is() method, validation failure messages are not
available.
The static usage can be convenient for invoking a validator ad hoc,
but if you have the need to run a validator for multiple inputs,
it's more efficient to use the non-static usage, creating an
instance of the validator object and calling its
isValid() method.
Also, the Zend_Filter_Input class allows you to
instantiate and run multiple filter and validator classes on demand
to process sets of input data. See
Zend_Filter_Input.
When working with self defined validators you can give a fourth parameter
to Zend_Validate::is() which is the namespace
where your validator can be found.
<?php
if (Zend_Validate::is($value, 'MyValidator', array('min' => 1, 'max' => 12),
array('FirstNamespace', 'SecondNamespace')) {
// Yes, $value is ok
}
Zend_Validate allows also to set namespaces as default.
This means that you can set them once in your bootstrap and have not to give
them again for each call of Zend_Validate::is(). The
following code snippet is identical to the above one.
<?php
Zend_Validate::setDefaultNamespaces(array('FirstNamespace', 'SecondNamespace'));
if (Zend_Validate::is($value, 'MyValidator', array('min' => 1, 'max' => 12)) {
// Yes, $value is ok
}
if (Zend_Validate::is($value,
'OtherValidator',
array('min' => 1, 'max' => 12)) {
// Yes, $value is ok
}
For your convenience there are following methods which allow the handling of namespaces:
Zend_Validate::getDefaultNamespaces(): Returns all set default namespaces as array.Zend_Validate::setDefaultNamespaces(): Sets new default namespaces and overrides any previous set. It accepts either a string for a single namespace of an array for multiple namespaces.Zend_Validate::addDefaultNamespaces(): Adds additional namespaces to already set ones. It accepts either a string for a single namespace of an array for multiple namespaces.Zend_Validate::hasDefaultNamespaces(): ReturnsTRUEwhen one or more default namespaces are set, andFALSEwhen no default namespaces are set.