regex on input
<form>
<label for="username">Username <i>(letters and numbers only, no punctuation or special characters)</i></label><br>
<input name="username" id="username" pattern="[A-Za-z0-9]+">
</form>regex on input
<form>
<label for="username">Username <i>(letters and numbers only, no punctuation or special characters)</i></label><br>
<input name="username" id="username" pattern="[A-Za-z0-9]+">
</form>html5 input pattern name
echo '<input type="text" maxlength="32" name="first_name" pattern="[A-Za-z]{1,32}" value="'.$_SESSION['user_first_name'].'" required>';Copyright © 2021 Codeinu
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