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Number testing

isNumber($value, array $options = array()) checks if a given string is a number and returns TRUE or FALSE.

Example 553. Number testing

<?php
$locale = new Zend_Locale();
if (Zend_Locale_Format::isNumber('13.445,36', array('locale' => 'de_AT')) {
    print "Number";
} else {
    print "not a Number";
}

Number localization
Float value normalization

Zend Framework

Normalization and Localization: