What are the common issues faced when displaying text fields with values containing spaces in PHP forms, and how can they be resolved?

When displaying text fields with values containing spaces in PHP forms, the common issue is that the spaces can break the HTML attribute values and cause the form to render incorrectly. To resolve this issue, you can use the `htmlspecialchars()` function to encode the text field values before displaying them in the form.

<input type="text" name="example_field" value="<?php echo htmlspecialchars($example_value); ?>">