I need to access the PHP internal representation of the $_GET and $_POST arrays inside of my function for a particular page request. Is there a PHP internal representation of these arrays? Like for example $_GLOBAL is a representation of the internal array EG[Symbol_Table]. Otherwise is there any way to identify and access the GET and POST variables inside the symbol table and extract them?
In short I need all the variables that I would get from the $_POST and $_GET arrays but inside the Zend Engine. I am developing an extension that has a function with the format (input parameters, page) where the input parameters are all the variables declared by the php page. Is there any way to access this?
They're PG(http_globals)[TRACK_VARS_GET] and PG(http_globals)[TRACK_VARS_POST] respectively.
In the newer version (I assume after 5.3), you have to use stream "php://input" to access GET or POST data.
You can look into the implementation of file_get_contents function in php to see how to open and read a stream.
Related
I am getting JSON files but each file has a code/ID with it, in the beginning
i am trying to make a standard way to crop the strings no matter how the code/ID changes.
so these are 2 JSON files:
a:12{/*JSON DATA HERE*/}
a:130 {/*JSON DATA HERE*/}
a:1 {/*JSON DATA HERE*/}
i did not find a way to locate the first occurrence of "{" and include it in the new string that will also include the rest of the JSON string.
in JAVA it would go something like that, but i need it in php:
String myjson = "a:130{/*JSON here*/}";
String newjson = myjson.substring(myjson.indexOf("{"), myjson.length());
how can i do that in php?
This really seems to be a PHP serialized array (through serialize / unserialize) and not JSON.
PHP uses a:<count>{...} to indicate a serialized array in its format.
If you can trust the data (i.e. not user submitted but generated by a trusted application), don't parse it yourself and use unserialize instead.
The reason why you never should use unserialize on user submitted data that you can't verify independently is that it is able to create objects of a user specific selection, and if the object defines __wakeup, it might be able to coerce the object into performing any operation the attacker want. This is also why there is a large warning on the unserialize manual page.
More or less, my question is as above.
I have A lot of data i am going to serialize and send to the server. With that said, is there a PHP function to parse it into PHP-objects to manipulate on the Serverside?
My thought is yes due to the dynamic nature of PHP, but i wasnt sure what it would be.
You essentially answered your own question. From the PHP manual entry for json_decode:
json_decode
Takes a JSON encoded string and converts it into a PHP variable.
That said, you'll obviously want to do all the requisite error checking and such.
You can also use json_decode with the true parameter to effectively convert it into to a PHP array like so: $var = json_decode($object,true);
I have a PHP multidimensional array witch i converted to JSON using JSON_encode().
I am using drupal so for those not familiar with it, drupal array often have keys that looks like that :
$some_array['und']['0']['value']
So my JSON object ends up looking like:
some_array.und.0.value
Now the problem is that when use the above syntaxe to retreive the value i the following JS error in the FB console : "missing name after . operator"
Also this data is meant to be used with a Jquery template, so i alos tried accessing this data directly in my template with:
${field_city.und.0.value}
Witch unfortunately didn't work either..
How would i go to fix that issue ? Can i access somehow this proprety with JS? Or is there a way that i have JSON_encode function replace all 0 by let's say "zero"? Or even replacing '0' when parsing the JSON string?
Suggestions much appreicated.
Try accessing it with some_array.und["0"].value. '0' is not a valid name for a javascript object, which is why accessing it via the . notation is not working.
However, if you access it via the square brackets, you can access keys with any name at all.
As well as using the dot notation, you can use regular array notation to access JSON nodes:
some_array.und['0'].value
Regular expressions have never been one of my strong points, and this one has me stumped. As part of a project, I want to develop an SEO link class in PHP. Handling the mod_rewrite through Apache is fairly straightforward for me, and that works great.
However, I'd like to create a function which is able to generate the SEO link based on a dynamic URL I pass in as the first (and only) parameter to the function.
For example, this would be the function call in PHP:
Blog Post Title
The function CreateLink would then analyse the string passed in, and output something like this:
blog/blog-post-title
The URL stub of the blog post is stored in the Database already. I think the best way to achieve this is to analyse the dynamic URL string passed in, and generate an associative array to be analysed. My question is, what would the Regular Expression be to take the URL and produce the following associative array in PHP?
link_pieces['page_type'] = 'blog/post';
link_pieces['post'] = 123;
link_pieces['category'] = 5;
Where page_type is the base directory and request page without extension, and the other array values are the request vars?
You can just use parse_url and parse_str, no need for regexes.
Use parse_url to break the URL into parts:
This function parses a URL and returns an associative array containing any of the various components of the URL that are present.
Then use parse_str to break down the querystring part of the URL.
I know the title isn't very clear. I'm new to PHP, so there might be name for this kind of thing, I'll try to explain as best as I can. Sometimes in a URL, when using PHP, there will be a question mark, followed by data. I'm sorry, I know this is very noobish, but I'm not sure what it's called to look for a tutorial or anything. Here is what I mean:
http://www.website.com/error_messages.php?error_id=0
How do you configure it to display different text depending on what the number is (in this example it's a number)
Could somebody please tell me what this is called and how I could do this? I've been working with PHP for a couple days and I'm lost. Thank you so very much for understanding that I am very new at this.
That "data" is the URL querystring, and it encodes the GET variables of that HTTP request.
Here's more info on query strings: http://en.wikipedia.org/wiki/Query_string
In PHP you access these with the $_GET "super-global" variable:
// http://www.website.com/error%5Fmessages.php?error%5Fid=0
// %5F is a urlencoded '_' character, which your webserver will most likely
// decode before it gets to PHP.
// So ?error%5Fid=0 reaches PHP as the 'error_id' GET variable
$error_id = $_GET['error_id'];
echo $error_id; // this will be 0
The querystring can encode multiple GET variables by separating them with the & character. For example:
?error_id=0&error_message=Something%20bad%20happened
error_id => "0"
error_message => "Something bad happened"
In that example you can also see that spaces are encoded as %20.
Here's more info on "percent encoding": http://en.wikipedia.org/wiki/Percent-encoding
The data after the question mark is called the "query string". It usually contains data in the following format:
param1=value1¶m2=value2
Ie, it is a list of key-value pairs, each pair separated with the ampersand character (&). In order to pass special characters in the values, they have to be encoded using URL-encoding format: Using the percent sign (%) followed by two hexadecimal characters representing the character code.
In PHP, parameters passed via the query string are automatically propagated to your script using the super-global variable $_GET:
echo $_GET['param1']; // will produce "value1" for the example above.
The raw, unprocessed query string can be retrieved by the QUERY_STRING server variable:
echo $_SERVER['QUERY_STRING'];
It's called the query string.
In PHP you can access its data via the superglobal $_GET
For example:
http://www.example.com/?hello=world
<?php
// Use htmlspecialchars to prevent cross-site scripting attacks (XSS)
echo htmlspecialchars($_GET['hello']);
?>
If you want to create a query string to append to a URL you can use http_build_query():
$str = http_build_query(array('hello' => 'world'));
As previously described, the data after the ? is the querystring (or GET data), and is accessed using the $_GET variable. The $_GET variable is an array containing the name=value pairs in the querystring.
Here is a breif description of $_GET and an example of it's usage:
http://www.w3schools.com/php/php_get.asp
Data can also be submited to a PHP script as POST data (found in the $_POST variable), which is used for passwords, etc, and is not stored in the URL. The $_REQUEST variable contains both POST and GET data. POST and GET data usually originates from being entered into a web form by a user (but GET data can also come directly from a link to an address, like in your example). More info about using web forms in PHP can be found here:
http://www.w3schools.com/php/php_forms.asp
its called "query string"
and you can retrieve it via $_SERVER["QUERY_STRING"]
or you can loop through $_GET
in this case the error_id, you can check it by something like this
echo $_GET['error_id'];
The term you are looking for is GET. So in php you need to access the GET variables in $_GET['variable_name'], e.g. in the example you gave $_GET['error_id'] will contain the value 0. You can then use this in your logic to echo back different information.
The bit after the question mark is called a Query String. The format is typically, although not necessarily always, key-value pairs, where the pairs are separated by an ampersand (&) and the value is separated from the name by an equals sign (=): ?var1=value1&var2=value2&.... Most web programming environments provide an easy way to access name-value pairs in this format. For example, in PHP, there is a superglobal, which is an associative array of these key-value-pairs. In your example, error_id would be accessible via:
$_GET['error_id']
The reason for the name "GET" is that query string variables are typically associated with a HTTP GET request. POST requests can contain GET variables too, whereas GET requests can't contain POST variables.
As to the rest of your question, you could approach the text issue in a number of ways, the simplest being switching on the error id:
$error_id = isset($_GET['error_id']) ? $_GET['error_id'] : 0;
switch($error_id) {
case 1:
echo "Error 1";
break;
default:
echo "Unknown Error";
break;
}
and more complex ways involve looking up the error message from a file, database or what have you.