Can a PHP script unserialize a Storable file created with Perl?
No, but you can dump PHP-readable data from Perl with PHP::Serialization. You also might want to pick something more standard, like YAML or JSON. Pretty much any language can understand those.
You could use JSON as a lingua-franca between the two languages, I suggest JSON::XS on the Perl side (with subroutines implemented in C/C++) for performances, then you can read back (in PHP) the JSON with this extension.
PHP being Turing-complete and all, the answer isn't really "no" so much as "not natively or with any well-known public module".
As chaos points out, you asked for Storable specifically, and so switching to YAML (or JSON) may be possible, but it may not. This might work to get it into YAML (or even JSON):
$output_format = 'YAML';
popen( "perl -MStorable -M${output_format}::Syck=Dump -e 'print Dump( retrieve( q{$storable_file_path} ))'", "r" );
Related
I'm trying to get Perl to read an offline pcap file and save the output into XML file so I can work with it in PHP.
I can't use PHP because its not my server but I can Perl. So my aim is to convert the PCAP file into XML so I have fun with it.
I have no idea where to start and have looked at the Perl Net::Pcap but I just don't understand the language.
Any ideas on what I should do?
Thank-you
Paul
Using Net::Pcap is a decent idea, although figuring out the format you'd want to write out the capture in doesn't seem all that easy. My favourite solution would be to use tshark (the command line version of wireshark) like so:
tshark -r $dmp_filename -Tpsml
This would give you the output in a XML standard format.
Of course if you don't have tshark, not very helpful...
I am newer for php. I want make php page cache, query data from mysql and store data into json format.
I have many questions:
which type of file should I store? .json or .txt or .cache? for I also need use json decode return datas into page.
I want use cron tab, make many mysql queries and write into one json file. what write code should I choose? fopen, fwrite or file_get_contents or other command? (do not cover the data, but continue write. I will deleted the file and renewer it at the next cron time)
If a multi write into a json data (10 or more mysql query at the same time and write into a same json file, each json child format like {name: ".$row['name']."}), how to completed a top { and bottom } to make a standad json data format?
{ //how to add this one
{name: ".$row['name']."}
{name: ".$row['name']."}
// many name from 10 more mysql queries
} //and this one
Thanks.
It's json_encode()
json_encode() — Returns the JSON representation of a value
<?php
$arr = array ('a'=>1,'b'=>2,'c'=>3,'d'=>4,'e'=>5);
echo json_encode($arr);
?>
which type of file should I store
It doesn't matter. There is no fixed extension, but I would pick .json just to make it clear what the file is supposed to contain.
what write code should I choose?
Just use file_put_contents to put the JSON string (see next section) into a file.
each json child format like
You really do not want to use that method. It might work for a while, but becomes very complex when you need to handle things like quoting and special-character escapes. Instead of re-inventing the wheel, use PHP's built-in JSON functions for this.
Create the data-structure you want using PHP's strings, numbers, and arrays, and then rely on json_encode to turn it into a string.
The main thing to be careful of is that depending on how your php array() looks, you might get JSON [] versus {}.
As far as saving the file as .txt or .json won't make a difference.
I think the focal point of this all lies in the json_encode page. Here's the example from that page:
This code:
<?php
$arr = array ('a'=>1,'b'=>2,'c'=>3,'d'=>4,'e'=>5);
echo json_encode($arr);
?>
Outputs like this:
{"a":1,"b":2,"c":3,"d":4,"e":5}
3 . You can use fopen and fwrite to write to your file. The second argument to fopen is the mode, you want to use 'a' for append.
Don't write your own cache because anything you write in PHP will be slower than can be supported by native extensions (like APC or memcached or even MySQL itself!!).
Don't cache as JSON. JSON is not a particulary 'fast' to serialize. If you're doing caching you don't want to do any serialization at all. Just store it as it is.
MySQL does query caching for you. If performance is a problem first tune your MySQL queries and database schema. Caching is one of the absolute last optimization you want to do.
If you want an easy way to cache, make a MySQL table called 'cache' and use that. If you want quick (small) file access, use MySQL (seriously). If you want an even faster cache access use an in-memory cache like APC or memcached.
Trying to implement the excellent jQuery bidirectional infite scroll as explained here:
http://www.bennadel.com/blog/1803-Creating-A-Bidirectional-Infinite-Scroll-Page-With-jQuery-And-ColdFusion.htm
For the server-side, which returns JSON, the example is in ColdFusion. Trying to implement it in PHP.
I need to find out what the format of the JSON is.
RIght now, I am returning
[{"src":"https:\/\/s3.amazonaws.com\/gbblr_2\/100\/IMG_1400 - original.jpg","offset":"5"},{"src":"https:\/\/s3.amazonaws.com\/gbblr_2\/100\/IMG_1399 - original.jpg","offset":6},{"src":"https:\/\/s3.amazonaws.com\/gbblr_2\/100\/IMG_1398 - original.jpg","offset":7}]
which doesn't work, in the html that is generated it shows "UNDEFINED" for both the src and the offset variables.
So my question: what kind of JSON does that coldfusion code generate? What is the format of JSON that I need to return.
Thanks for any tips!!
CF's JSON mentioned in Ben's post is similar to this:
[{"SRC":"http:\/\/example.com\/public","OFFSET":3.0},{"SRC":"http:\/\/example.com\/public","OFFSET":3.0}]
I'd try to check key names first. Yes, CF makes them uppercase, and JS doesn't like it sometimes. Check his function applyListItems() and check if RegExp finds something or not.
If this doesn't help little Firebug line debugging and console.log will do the trick I guess.
Looks like the JSON you're creating should be equivalent to his. He is creating an array of structures; where each structure contains the keys "src" and "offset".
He is converting to base64 and binary for streaming purposes, but I don't know how that would work -- or if it would be required -- for a php implementation.
I would use Firebug to figure out exactly where in your JavaScript the error is being thrown. That will tell you more about what exactly the problem is.
Is there an equivalent to Perl's format function in PHP? I have a client that has an old-ass okidata dotmatrix printer, and need a good way to format receipts and bills with this arcane beast.
I remember easily doing this in perl with something like:
format BILLFORMAT =
Name: #>>>>>>>>>>>>>>>>>>>>>> Age: ####
$name, $age
.
write;
Any ideas would be much appreciated, banging my head on the wall with this one. O.o
UPDATE: I cannot install Perl in this environment, otherwise I would simply use Perl's format function directly.
You could use printf to do something similar.
http://www.php.net/manual/en/function.printf.php
printf("Name: %21s Age: %3i\n",$name,$age);
If you wanted the name left aligned, you would just add a -
printf("Name: %-21s Age: %3i\n",$name,$age);
It defaults to right aligned.
If you don't mind using a Perl process to control the printer, you could serialize the data in PHP and pass it to a Perl script.
I've had great luck using PHP::Serialization to handle data serialization and sharing between Perl and PHP. You could also use YAML or JSON for this task.
Sounds like a perfect situation to use heredoc.
I know how to do this in Ruby, but I want to do this in PHP. Grab a page and be able to parse stuff out of it.
Take a look at cURL. Knowing about cURL and how to use it will help in many ways as it's not specific to PHP. If you want something specific however, you can use file_get_contents which is the recommended way in PHP to get the contents of a file into a string.
$file = file_get_contents("http://google.com/");
How to parse it depends on what you are trying to do, but I'd recommend one of the XML libraries for PHP.
You could use fopen in read mode: fopen($url, 'r'); or more simply file_get_contents($url);. You could also use readfile(), but file_get_contents() is potentially more efficient and therefore recommended.
Note: these are dependent on config (see the linked manual page) but will work on most setups.
For parsing, simplexml is enabled by default in PHP.
$xmlObject = simplexml_load_string($string);
// If the string was valid, you now have a fully functional xml object.
echo $xmlObject->username;
Its funny, I had the opposite question when I started rails development