What potential issue can arise when using a button element as a submit button in PHP forms?

Using a button element as a submit button in PHP forms can cause issues with form submission if the button does not have a type attribute specified. By default, a button element without a type attribute is treated as a button, not a submit button. To solve this issue, you should explicitly set the type attribute of the button element to "submit" so that it triggers form submission. 

<form method="post" action="submit.php">
  <input type="text" name="username" placeholder="Enter your username">
  <button type="submit">Submit</button>
</form>

Keywords

button element submit button PHP forms form submission validation errors

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