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PHP+SQL7.

Directory ManagementGDFile UploadsExercises

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PHP+SQL7.

Directory ManagementGDFile UploadsExercises

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Directory Functions• getcwd() , chdir()• opendir(), readdir(), closedir(), rewinddir()• scandir(), glob()• realpath()

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GD Functions• image* , http://php.net/manual/en/book.image.php• $im=imagecreatefromjpeg($path) //png, gif, wbmp• imagesy($im), imagesx($im)• $index=imagecolorat($im, X, Y);• $rgb=imagecolorsforindex($im, $index);• $index=imagecolorallocate($im, R, G, B);• imagesetpixel($im, X, Y, $index);

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GD Example – pagetitle.php

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GD Example – getChannel.php

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Upload file

• An HTML form should be used to upload files (files are sent after the request, just like the POST)

• MAX_FILE_SIZE, upload_max_filesize, max_file_uploads , post_max_size, LimitRequestBody

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Upload Example – Uploader.php$file="myfile";$DIR_destination="images/"IF (valid upload file){

$name=create local namemove uploaded file to locationIF (jpeg) create thumbnail

}Redirect user back to index.php

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Valid file?

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Create local name

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Move file?

move_uploaded_file($old_name, $new_name);

move_uploaded_file($_FILES[$file]["tmp_name"], $DIR_destination.$name);

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Create Thumbnail?

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EXERCISES (OPTIONAL)• Create an upload form with a checkbox and four

textboxes. If the checkbox is checked, then you should draw a rectangle to the thumbnail – the rectangle's coordinates are specified in the four textboxes

• Write a dynamically sized copyright note to the bottom-right corner of every uploaded image (imagettfbbox?)

• Draw 20 random lines to the image

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Directory ManagementGDFile UploadsExercises

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• Be sure to check for all possible errors/conditions in all the scripts (no input, bad input)! Direct access for HTML files is not allowed: the PHP files have to read and display the HTML files if there is no user input, and the proper output should be displayed if there is a user input.

• You can use xxxx.php?action=SOMETHING if you want, in this case: every PHP file will require two actions: one to display the HTML form, and another to display the output. The HTML form should POST all data to the second action.

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• You should create a script to list the Fibonacci sequence.– Create a file 1_fibo.html that has a form inside: the form

should have a text input, and a submit button. The form should submit all data via POST to 1_fibo.php.

– Create a file 1_fibo.php that should list all elements of the Fibonacci sequence until the given number, and the script should decide if the last number is a perfect number or not.

– [The first two numbers in the Fibonacci sequence are 0 and 1, and each subsequent number is the sum of the previous two (0, 1, 1, 2, 3, 5, 8). A perfect number is a number that is half the sum of all of its positive divisors (including itself: (1 + 2 + 3 + 6 ) / 2 = 6) ]

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• Improve the calculation of the Fibonacci sequence.– Create a file 2_fibo.html that can submit a number to

2_fibo.php via POST. In addition, there should be a select input where the user can choose to use the Fibonacci file or not.

– If the user doesn’t want to use the Fibonacci file, then 2_fibo.php should simply calculate all Fibonacci numbers just like in exercise 1.

– If the user wants to use the file, then 2_fibo.php should use a file to store the Fibonacci sequence (2_fibo.txt: in the beginning, the file is non-existent. Later, this file will grow!) Let’s say we have N Fibonacci numbers in the file, and the user wants M Fibonacci numbers.• If M<=N, then read M Fibonacci numbers from the file, and

write it out for the user.• If M>N, then read all Fibonacci numbers from the file, write

it out to the user. Then, calculate all remaining numbers, write it out to the user, and write it into the file as well.

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• Visualize the calculation of the Fibonacci sequence. – Create a file 3_fibo.html that can submit a number to

3_fibo.php via POST. In addition, there should be a radiobutton input where the user can choose to receive a JPEG or a PNG file.

– In 3_fibo.php, you should create a 1000x1000 image, and on that image you should write all Fibonacci numbers as a text (up to N, where N is the number the user entered. Every Fibonacci number should be in random colour and in random position! Use imagettftext / imagestring!)

– Produce a blank red image without text if there are any errors.

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Recipe book• Create an application to manage a recipe book• The script should have actions to manage the

ingredients.txt file: the file contains one ingredient per line; create actions to list them or add a new ingredient

• The script should have actions to manage the recipes.txt file: the file should have the entries in the format of:RECIPE_NAME|ingredient1,ingredient2,ingredient3

• There should be an action to list all recipes (and the ingredients of the recipes) in a nice-looking table

• There should be an action to add a new recipe: first ask the recipe name and the number of ingredients; then input the ingredients (using selects), then save into the file

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