Giải pháp thiết kế web động với PHP - p 14

BRINGING FORMS TO LIFE The ability to reuse the same script—perhaps with only a few edits—for multiple websites is a great timesaver. However, sending the input data to a separate file for processing makes it difficult to alert users to errors without losing their input. To get around this problem, the approach taken in this chapter is to use what s known as a self-processing form. Instead of sending the data to a separate file, the page containing the form is reloaded, and the processing script is wrapped in a PHP conditional statement above the DOCTYPE declaration that checks if the...