Le funzioni strtoupper() e strtolower() convertono i caratteri di una data stringa rispettivamente in maiuscolo e minuscolo. In particolare, strtolower() torna utile per uniformare dati provenienti da un modulo contatti. Un caso abbastanza comune è un si
<?php /** Utility class: static methods for cleaning & escaping untrusted (i.e. user-supplied) strings. Any string can (usually) be thought of as being in one of these 'modes': pure = what the user actually typed / what you want to see on t
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