I have an object and need to access an attribute from a string like this:
$string = 'items[0]->sellers[0]->commertialOffer->Price';
I've tried something like this but it doesn't work:
$myObject->{$string};
Any idea?
$items = '{"items":[{"sellers":[{"commertialOffer":{"Price":33}}]}]}';
$myObject = json_decode($items);
$string = 'items[0]->sellers[0]->commertialOffer->Price';
echo ($myObject->{'items'}[0]->{'sellers'}[0]->{'commertialOffer'}->{'Price'});
echo ($myObject->items[0]->sellers[0]->commertialOffer->Price);
As $myObject->items is an array you can`t access it like
$string = 'items[0]';
echo $myObject->{$string};
You can access that by using
$string = 'items';
echo $myObject->{$string}[0];
Are you passing the string between two functions ? If yes , then take 4 values and create the string like :-
$string = $value1.'|'.$value2.'|'.$value3.'|'.$value4 ;
Then explode the string and get back the 4 values .
You probably want to revise your problem because interpreting raw code from a string is often a bad idea. You could potentially use the eval function: see. Again, this is probably not a good idea: when is eval evil?
Related
I'm trying to pull a string from my URL in WordPress, and create a function around it in the functions file.
The URL is:
"https://made-up-domain.com/?page_id=2/?variables=78685,66752"
My PHP is:
$string = $_GET("variables");
echo $string;
So I'm trying to return "78685,66752". Nothing happens. Is the first question mark a problem? Or what am I doing incorrectly? Thanks!
$_GET should be in the form
$string = $_GET["variables"];
and not
$string = $_GET("variables");
$_GET is not a function but an Array so correct way of reading it is
$string = $_GET['variables'];
You are also creating the query string all wrong, you should be using
?variables=123,456&page=1
Read more about $_GET here http://php.net/manual/en/reserved.variables.get.php
Your URL should be like:
https://made-up-domain.com/?page_id=2&variables=78685,66752
instead of:
https://made-up-domain.com/?page_id=2/?variables=78685,66752
& char is separating the queries in URL.
And you have syntax error. Use $string = $_GET["variables"]; because $_GET is a superglobal array, not a function.
Use $variables = explode(",", $string); separate values into an array if you want. Simplier way is $variables = explode(",", $_GET["variables"]);
You should format your href and get parameter like this
http://example.com/mypage.html?var1=value1&var2=value2&var3=value3
+ Edit your get method syntax
$string = $_GET['variables'];
This seem so simple, and yet I can't find a solution anywhere.
What I want to do is add the contents (r-value) of a variable to an associative array instead of a reference to the variable.
For example, I want this:
$myStr1 = "sometext";
$myStr2 = "someothertext";
$myArray = array(
"key1"=>$myStr1,
"key2"=>$myStr2
);
echo($myArray["key1"]);
To produce this:
"sometext"
Instead of this:
"1" // why??
Any help would be appreciated.
EDIT:
The above works; my bad. Here's the real problem - my $myStr1 variable isn't just assiged a string literal like in the above; it's created using the following syntax:
$myStr1 = "sometext" + anObject->intProperty + "moretext";
Basically I use the + to concatenate various types into a string. Maybe + isn't doing what I think it's doing?
EDIT:
It was definitely the + operator. I casted all non-strings to strings and used . to concatenate instead.
You've got it correct the first time. Try this:
$myStr1 = "sometext";
$myStr2 = "someothertext";
$myArray = array(
"key1"=>$myStr1,
"key2"=>$myStr2
);
unset($myStr1);
echo($myArray["key1"]);
Even though we unset() the $myStr1 variable, it still echoed sometext.
It should be noted that while it is possible to set $myStr1 by reference, it's not the default.
Try your code and its result is:
sometext
Everyone knows in PHP you can do this:
$m = "my string is {$string}";
But is taht possibile with function too? Like:
$m = "my string is {getStringValue()}";
The string expansion in {$..} goes a bit beyond just being able to execute functions. I for example used gettext with that. But you can also use tricks like that:
$html = "htmlentities"; // any callback function
// or just: $html = function($s){ return $s; }
print "even allows expressions {$html(2+3*5+rand(2,17))} here";
That's possible because PHP allows any variable expression there in order to support the simple object notation case:
print "this isn't just a {$obj->prop} string variable";
And for example I'm utilizing an object which implements ArrayAccess, where even this is a method invocation:
print "Makes some things {$_GET->ascii->html['input']} simpler";
We had a few such topics on SO, but for the life of me I can't find a good reference ...
This is not possible (and it wouldn't be very readable too, especially if the function had parameters).
You could use sprintf:
$m = sprintf("my string is %s", getStringValue());
Only variable names are expanded
http://www.php.net/manual/en/language.types.string.php#language.types.string.syntax.double
With concatenation, If I understand well what you're trying to do:
$m = "my string is {".getStringValue()."}";
why I get error when I pass the string with something like 'form.php?', for instance,
parse_str('form.php?category=contacts');
echo $category;
I get this,
Notice: Undefined variable: category in C:\wamp\www\1hundred_2011_MVC\applications\CMS\category_manage.php on line xx
but,
parse_str('category=contacts');
echo $category;
I get what I want,
contacts
how can I fix it? I have to pass something like 'xxx.php?category=contacts' to get 'contacts' or something in the variable.
thanks.
The function parse_str only parses the query string, not the entire URL. Try using parse_url with the component set to PHP_URL_QUERY to extract the query string first, then use parse_str on that.
$url_query = parse_url('form.php?category=contacts', PHP_URL_QUERY);
parse_str($url_query, $output);
echo $output['category'];
Result:
contacts
See it at ideone.
parse_str will only accept query strings:
$q = 'foo?hello=world';
parse_str($q);
echo ${'foo?hello'}; // outputs 'world'
Strip the beginning of the URL first:
$q = 'foo?hello=world';
parse_str(substr($q, strpos($q, '?')+1);
echo $hello; // outputs 'world'
Consider using parse_str second argument to have the data in an array instead, to avoid overwriting local variables.
You may want to use urldecode plus return extracted variables like so:
... some helper class...
/**
* Return parsed serialized JQuery object as PHP array of extracted variables
*/
protected static function parseFields($encoded){
parse_str(urldecode($encoded));
unset($encoded);
return get_defined_vars();
}
Also, you may want to utilize the JQuery function "$.param(data)" for creating URL encoded string:
var encoded=$.param(fields);
and submit via AJAX/POST request to server to function parseFields().
I have a string like this :
oauth_token=1%2F7VDUGD4tKIqSu4jX4DoeCRD1KbqqgTxFnFFliVgbSss&oauth_token_secret=Rk%2FwejMIg6t%2BFphvRd%2BZ5Wkc
How can I extract the two variables oauth_token and oauth_token_secret from the about string using PHP
NOTE: this is not coming from the URL( we can do that using $_GET)
Thank YOU
Use parse_str() for parsing query string parameters.
// Extract into current scope, access as if they were PHP variables
parse_str($str);
echo $oauth_token;
echo $oauth_token_secret;
// Extract into array
parse_str($str, $params);
echo $params['oauth_token'];
echo $params['oauth_token_secret'];
You may wish to urldecode() the variables after you've extracted them.
try this
$text = "oauth_token=1%2F7VDUGD4tKIqSu4jX4DoeCRD1KbqqgTxFnFFliVgbSss&oauth_token_secret=Rk%2FwejMIg6t%2BFphvRd%2BZ5Wkc"
;
$i=explode('&',$text);
$j=explode('=',$i[0]);
$k=explode('=',$i[1]);
echo $j[0]."<br>";
echo $j[1]."<br>";
echo $k[0]."<br>";
echo $k[1]."<br>";
1, split the two parts of the $string,
$str_array = explode('&',$string);
2, get the part after the "=" sign, so for the oauth_token part:
$oauth_token_array = explode('=',$str_array[0]);
$oauth_token = $oauth_token_array[1];
EDIT: ignore this, it's definitely verbose. BoltClock's the solution.
The best way (most reusable) is to use a function which returns an array similar to $_GET.
edit There is already a function for this: http://www.php.net/manual/en/function.parse-str.php This will work with array get values too.
$values = array();
parse_str($query_strng, $values);
Quite an ugly function, why can't it just return the array of values. It either stuffs them into individual variables or you need to pass in a reference. Come on php, you can do better. /rant