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What is wrong with this regexp? I need it to make $name to be letter-number only. Now it doens’t seem to work at all.
if (!preg_match("/^[A-Za-z0-9]$/",$name)) {
$e[]="name must contain only letters or numbers";
}
You need a quantifier otherwise it will only allow one character. For example, to require that there must be one or more characters use
+: