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What is Zend_Filter_Alpha and how does it work? - Code Stap
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What is Zend_Filter_Alpha and how does it work?

What is Zend_Filter_Alpha and how does it work?

Answer: `Zend_Filter_Alpha` is a component of the Zend Framework that filters a given input string, allowing only alphabetic characters (A-Z, a-z) and removing any non-alphabetic characters. It is primarily used to sanitize user input by ensuring that only letters are retained. When applied, it processes the input by iterating through each character and omitting any characters that are not part of the allowed set, resulting in a clean, alphabetic-only string.

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