创建一个动态的php文件并定义一个数组

Question

I need to update some static site data periodically, so i am thinking of keeping it in a format easily and readily available on the server.

I am thinking of creating a php file that can be included in the code, so preparing the data gets separate from the browser requests.

i fetch the data from the db, so i have an array right now in key value format.

now i want to create a php file, that just defines that array.

the key and value will be string based values, and the data is in swedish.

is there a way to directly dump the array to a file, and then just include the file without any preprocessing. I want the file in the following output :

$array = array ();
$array ["key"] = "value";
$array ["key"] = "value";
$array ["key"] = "value";
$array ["key"] = "value";

Answer 1

I would also recommend looking at var_export as you won't have to serialize and encode to use it.

For example (untested):

<?php
$array = array('key' => 'v');
$exported = var_export($array, TRUE);
file_put_contents('/path/to/file', '<?php $var = ' . $exported . '; ?>');
?>

and then you can read it back in via:

<?php
include '/path/to/file';
// and now you have access to $var
// of course you may want to change the name of the $var variable as it
// will be brought into global scope (and might conflict)
?>

Answer 2

Use PHP's serialize and base64_encode functions and write the result to file.

When you want to use the data: simply read the file, decode and unserialize:

 <?php // dump data $array = array("key"=>"value"); file_put_contents("test_data.txt", base64_encode(serialize($array))); 

  // retrieve data
  $string = file_get_contents("test_data.txt");
  $data = unserialize(base64_decode($string)));
  var_dump($data);

Encoding the array in base64 will allow you to safely write binary data to the file (eg. extended character sets).

Answer 3

You can directly write the code into the file fwrite($handle, "$array = array();"); then doing an eval() on the file content you're reading back. It'll work, but its dangerous because if any malicious code is put into the text file, it will be executed.

I recommend you take a look at serialization: http://php.net/manual/en/function.serialize.php and write serialized data that you unserialize back into an array. It's much safer.