PHP 5 File Handling

File handling is an important part of any web application. You often need to open and process a file for different tasks.

PHP Manipulating Files

PHP has several functions for creating, reading, uploading, and editing files.

Be careful when manipulating files!

  • When you are manipulating files you must be very careful.
  • You can do a lot of damage if you do something wrong. Common errors are: editing the wrong file, filling a hard-drive with garbage data, and deleting the content of a file by accident.

    • PHP readfile() Function

    The readfile() function reads a file and writes it to the output buffer.The PHP code to read the file and write it to the output buffer is as follows (the readfile() function returns the number of bytes read on success):

    AJAX = Asynchronous JavaScript and XML
    CSS = Cascading Style Sheets
    HTML = Hyper Text Markup Language
    PHP = PHP Hypertext Preprocessor
    SQL = Structured Query Language
    SVG = Scalable Vector Graphics
    XML = EXtensible Markup Language