How can HTML5 pattern attribute be used for client-side validation in PHP forms?

When using PHP forms, client-side validation can be implemented using the HTML5 pattern attribute. This attribute allows you to specify a regular expression that the input value must match before the form can be submitted. This can help improve user experience by providing instant feedback on the validity of the input data. 

<form method="post" action="process_form.php">
  <label for="email">Email:</label>
  <input type="email" id="email" name="email" pattern="[a-z0-9._%+-]+@[a-z0-9.-]+\.[a-z]{2,}$" required>
  <input type="submit" value="Submit">
</form>

Keywords

HTML5 pattern attribute client-side validation PHP forms validation error

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