Php swf to jpg

Содержание

How to create an image file(jpg) from swf(flash) ?
Similar topics
Php – SWF to image (jpg, png, …) with PHP
Best Solution
Related Solutions
Correctly setting up the connection
Explanation
Can prepared statements be used for dynamic queries?
Deleting a single array element
unset()
\array_splice() method
Deleting multiple array elements
\array_diff() method
\array_diff_key() method

How to create an image file(jpg) from swf(flash) ?

For that I am thinking to convert the flash’s last instance to a image file.

I’d like to know too, looking for something similar

Php – SWF to image (jpg, png, …) with PHP

I would like to know if it could be possible to convert an swf file, with his flashvars to a bitmap image. But all that in PHP, is it possible ? I precise that I would like to do it several times, and that the .swf file is not mine (is not on my site, I take it from a other site).

I allready thank you for your answers ! 🙂

Best Solution

I think the closest you will get is with SWFTOOLS: http://www.swftools.org/

It can extract bitmaps and flashvars. There are windows and linux binaries available so you’ll have to run it from the commandline, that should not be a problem. The main problem of converting an swf to jpeg is that a lot of flash files require execution of ActionsScript in order to show something usefull, and then still you have to have the right frame, so it might not be so straightforward.

So my answer would be: Yes, it might be possible if the movie is very simple and only consists of simple bitmaps. But also no: for most swf’s it will be very difficult without a flash client and screenshot capabilities if you really need the output of the movie.

Php – How to prevent SQL injection in PHP

The correct way to avoid SQL injection attacks, no matter which database you use, is to separate the data from SQL, so that data stays data and will never be interpreted as commands by the SQL parser. It is possible to create SQL statement with correctly formatted data parts, but if you don’t fully understand the details, you should always use prepared statements and parameterized queries. These are SQL statements that are sent to and parsed by the database server separately from any parameters. This way it is impossible for an attacker to inject malicious SQL.

You basically have two options to achieve this:

PDO

 $stmt = $pdo->prepare('SELECT * FROM employees WHERE name = :name'); $stmt->execute([ 'name' => $name ]); foreach ($stmt as $row) < // Do something with $row >

 $stmt = $dbConnection->prepare('SELECT * FROM employees WHERE name = ?'); $stmt->bind_param('s', $name); // 's' specifies the variable type => 'string' $stmt->execute(); $result = $stmt->get_result(); while ($row = $result->fetch_assoc()) < // Do something with $row >

If you’re connecting to a database other than MySQL, there is a driver-specific second option that you can refer to (for example, pg_prepare() and pg_execute() for PostgreSQL). PDO is the universal option.

Correctly setting up the connection

Note that when using PDO to access a MySQL database real prepared statements are not used by default. To fix this you have to disable the emulation of prepared statements. An example of creating a connection using PDO is:

$dbConnection = new PDO('mysql:dbname=dbtest;host=127.0.0.1;charset=utf8', 'user', 'password'); $dbConnection->setAttribute(PDO::ATTR_EMULATE_PREPARES, false); $dbConnection->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

In the above example the error mode isn’t strictly necessary, but it is advised to add it. This way the script will not stop with a Fatal Error when something goes wrong. And it gives the developer the chance to catch any error(s) which are throw n as PDOException s.

What is mandatory, however, is the first setAttribute() line, which tells PDO to disable emulated prepared statements and use real prepared statements. This makes sure the statement and the values aren’t parsed by PHP before sending it to the MySQL server (giving a possible attacker no chance to inject malicious SQL).

Although you can set the charset in the options of the constructor, it’s important to note that ‘older’ versions of PHP (before 5.3.6) silently ignored the charset parameter in the DSN.

Explanation

The SQL statement you pass to prepare is parsed and compiled by the database server. By specifying parameters (either a ? or a named parameter like :name in the example above) you tell the database engine where you want to filter on. Then when you call execute , the prepared statement is combined with the parameter values you specify.

The important thing here is that the parameter values are combined with the compiled statement, not an SQL string. SQL injection works by tricking the script into including malicious strings when it creates SQL to send to the database. So by sending the actual SQL separately from the parameters, you limit the risk of ending up with something you didn’t intend.

Any parameters you send when using a prepared statement will just be treated as strings (although the database engine may do some optimization so parameters may end up as numbers too, of course). In the example above, if the $name variable contains ‘Sarah’; DELETE FROM employees the result would simply be a search for the string «‘Sarah’; DELETE FROM employees» , and you will not end up with an empty table.

Another benefit of using prepared statements is that if you execute the same statement many times in the same session it will only be parsed and compiled once, giving you some speed gains.

Oh, and since you asked about how to do it for an insert, here’s an example (using PDO):

$preparedStatement = $db->prepare('INSERT INTO table (column) VALUES (:column)'); $preparedStatement->execute([ 'column' => $unsafeValue ]);

Can prepared statements be used for dynamic queries?

While you can still use prepared statements for the query parameters, the structure of the dynamic query itself cannot be parametrized and certain query features cannot be parametrized.

For these specific scenarios, the best thing to do is use a whitelist filter that restricts the possible values.

// Value whitelist // $dir can only be 'DESC', otherwise it will be 'ASC' if (empty($dir) || $dir !== 'DESC')

Php – Deleting an element from an array in PHP

There are different ways to delete an array element, where some are more useful for some specific tasks than others.

Deleting a single array element

If you want to delete just one array element you can use unset() or alternatively \array_splice() .

If you know the value and don’t know the key to delete the element you can use \array_search() to get the key. This only works if the element does not occur more than once, since \array_search returns the first hit only.

unset()

Note that when you use unset() the array keys won’t change. If you want to reindex the keys you can use \array_values() after unset() , which will convert all keys to numerically enumerated keys starting from 0.

$array = [0 => "a", 1 => "b", 2 => "c"]; unset($array[1]); // ↑ Key which you want to delete

\array_splice() method

If you use \array_splice() the keys will automatically be reindexed, but the associative keys won’t change — as opposed to \array_values() , which will convert all keys to numerical keys.

\array_splice() needs the offset, not the key, as the second parameter.

$array = [0 => "a", 1 => "b", 2 => "c"]; \array_splice($array, 1, 1); // ↑ Offset which you want to delete

array_splice() , same as unset() , take the array by reference. You don’t assign the return values of those functions back to the array.

Deleting multiple array elements

If you want to delete multiple array elements and don’t want to call unset() or \array_splice() multiple times you can use the functions \array_diff() or \array_diff_key() depending on whether you know the values or the keys of the elements which you want to delete.

\array_diff() method

If you know the values of the array elements which you want to delete, then you can use \array_diff() . As before with unset() it won’t change the keys of the array.

$array = [0 => "a", 1 => "b", 2 => "c", 3 => "c"]; $array = \array_diff($array, ["a", "c"]); // └────────┘ // Array values which you want to delete

\array_diff_key() method

If you know the keys of the elements which you want to delete, then you want to use \array_diff_key() . You have to make sure you pass the keys as keys in the second parameter and not as values. Keys won’t reindex.

$array = [0 => "a", 1 => "b", 2 => "c"]; $array = \array_diff_key($array, [0 => "xy", "2" => "xy"]); // ↑ ↑ // Array keys which you want to delete

If you want to use unset() or \array_splice() to delete multiple elements with the same value you can use \array_keys() to get all the keys for a specific value and then delete all elements.