php_mysql_apache [Electronic resources]

Julie C. Meloni

نسخه متنی -صفحه : 323/ 126
نمايش فراداده

Workshop

The workshop is designed to help you anticipate possible questions, review what you've learned, and begin putting your knowledge into practice.

Quiz

1:

What functions do you use to add library code to the currently running script?

2:

What function do you use to find out whether a file is present on your file system?

3:

How do you determine the size of a file?

4:

What function do you use to open a file for reading or writing?

5:

What function do you use to read a line of data from a file?

6:

How can you tell when you've reached the end of a file?

7:

What function do you use to write a line of data to a file?

8:

How do you open a directory for reading?

9:

What function do you use to read the name of a directory item after you've opened a directory for reading?

Answers

A1:

You can use the require() or include() statement to incorporate PHP files into the current document. You could also use include_once() or require_once().

A2:

You can test for the existence of a file with the file_exists() function.

A3:

The filesize() function returns a file's size in bytes.

A4:

The fopen() function opens a file. It accepts the path to a file and a character representing the mode. It returns a file resource.

A5:

The fgets() function reads data up to the buffer size you pass it, the end of the line, or the end of the document, whichever comes first.

A6:

The feof() function returns true when the file resource it's passed reaches the end of the file.

A7:

You can write data to a file with the fputs() function.

A8:

The opendir() function enables you to open a directory for reading.

A9:

The readdir() function returns the name of a directory item from an opened directory.

Activities

1:

Create a form that accepts a user's first and second name. Create a script that saves this data to a file.

2:

Create a script that reads the data file you created in activity 1. In addition to writing its contents to the browser (adding a <BR> tag to each line), print a summary that includes the number of lines in the file and the file's size.