New! Can I use the door leading from Vatican museum to St. Peter's Basilica? 594), Stack Overflow at WeAreDevelopers World Congress in Berlin, Temporary policy: Generative AI (e.g., ChatGPT) is banned, Preview of Search and Question-Asking Powered by GenAI, Reference Guide: What does this symbol mean in PHP? : in_channels = inputs.shape[-1].value in_channels = inputs.shape.as_list()[-1] .value And what is a Turbosupercharger? Eliminative materialism eliminates itself - a familiar idea? @Jonas Ballestad This sounds like your error reporting is off or low. If it is used in the same expression but on separate lines it works. I removed the dynamic object properties and replaced them object properties declared as part of each class (public in this case). A class should not have a variable number of properties and properties should not be enumerated collections. It is not possible to use an alias during the runtime. Asking for help, clarification, or responding to other answers. It is possible that I was doing something wrong in the way I was using dynamic object properties. rev2023.7.27.43548. Hope this helps you. with variable variable they will get 'foo' is undefined. When I use $GLOBALS instead, it returns the correct variable name for some reason. Not the answer you're looking for? There are probably better ways of doing what you're trying to do. If get_class() is called with anything other than an Possible Duplicate: Objects Late static bindings are explained here: If you want the Class Name without the Namespace or if you've got here because basename() returns a dot (.) Is this possible? Not the answer you're looking for? // You have to overload the getInstance method in each extended class: Note that the constant __CLASS__ is different from get_class($this) : Take care using the backtrace method to find the calling class of a static method, you should step backward through the array and find a match for your getInstance() function. Are arguments that Reason is circular themselves circular and/or self refuting? Here's an example of the inspector function (and my dInspect class) in action: Texts are in spanish in that page, but code is concise and really easy to understand. Each object has all the properties and methods defined in the class, but they will have different property values. Approach 3: Write a function to convert object of the initial class into serialized data using serialize() method. Unlike function and class names, variable names are case-sensitive. If the variable is interchangable, you must have logic somewhere that's determining which variable gets used. I'll have to disagree on the ugliness of it. We can set the name of an instance variable as a string and use that string to access or modify the variable. "Cannot find called class -> stack level too deep. name of that class is returned. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. an E_WARNING level error was raised. And what is a Turbosupercharger? Sci fi story where a woman demonstrating a knife with a safety feature cuts herself when the safety is turned off. Single Predicate Check Constraint Gives Constant Scan but Two Predicate Constraint does not. 'int' object has no attribute 'value'? - Parameters object The tested object. Not the answer you're looking for? An alternative is to either use reflection (just as ugly but doesn't throw warnings) or get rid of the object altogether and use an array instead. Edit: to be clear, there is no good way to do this in PHP, which is probably because you shouldn't have to do it. getting the $color property: The $this keyword refers to the current object, and is only available inside Otherwise, the object name and the keys for the property will always be the same. Would fixed-wing aircraft still exist if helicopters had been invented (and flown) before them? How to help my stubborn colleague learn new ways of coding? Difference between PHP self and this. Stable Diffusion WebUI 1.4 Stable Diffusion WebUI 1.4 . // I don't remember where I found this, but this is to allow php < 5.3 to use this method. Can someone point me in the right direction? Does anyone with w(write) permission also have the r(read) permission? also that function should be in one line without "var_dump" - with combination. CPU time went from over 7 seconds to 0.177 seconds. Try your code with $a = 10; $b = 10; print_r(print_var_name($b)); I have worked with a system that used variable variables extensively. An Object Variable variable stores the name of an instance variable. A namespace or a class is determined by its complete path, starting from the root namespace. OverflowAI: Where Community & AI Come Together, Get variable name of object inside the object php, How to get name of a initializer variable inside a class in PHP, Behind the scenes with the folks building OverflowAI (Ep. An array can hold many values under a single name, and you can access the values by . All you need to do is put the variable name in $variable within that logic while you're doing everything else. You should not need to dynamically find out what class a static method belongs to, since the context of your code should make it quite obvious. php get the variable name from other variable. I couldn't think of a way to do this efficiently either but I came up with this. In the example below, $apple and $banana are instances of the class Fruit: In the example below, we add two more methods to class Fruit, for setting and I created this code trying to answer for How to get name of a initializer variable inside a class in PHP. By clicking Post Your Answer, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. Note: While merging the objects using array_merge (), elements of array in argument1 are overwritten . We can access a constant from outside the class by using the class name followed . Would fixed-wing aircraft still exist if helicopters had been invented (and flown) before them? Where-Object {$_.name -Match 'Network'} Note 1: The real-life task is to research for network type WMI objects. // This acctually is not what we want, $class will always be 'Singleton' :(. How to draw a specific color with gpu shader. I'm trying to populate a template with variables from a database. For plain objects and Arrays, the variable will return the result of a recursive merge, where only shared keys are replaced. I made such a method for one of my classes in PHP5, but found out that static methods in PHP5 do not 'know' the name of the calling subclass', so I use a backtrace to determine it. Not the answer you're looking for? @Clox Generally, the main benefit of using the latter if if you have an existing system that consumes a variable in an array-like way, but you want the flexibility and power offered by objects. Did active frontiersmen really eat 20,000 calories a day? Does that work with object properties? Rules for Python variables: A variable name must start with a letter or the underscore character. Each object has all the properties and methods defined in the class, but 6 . Thoughts on how to approach this? Class constants can be useful if you need to define some constant data within a class. OverflowAI: Where Community & AI Come Together. This becomes problematic when attempting to call an overridden static method from within an inherited method in a derived class. Finds whether the given variable is an object. However, my program took 7 seconds to run. @eisberg I tried. The statement below creates (in other words: declares) a variable with the name "message": let message; Now, we can put some data into it by using the assignment operator =: In PHP, it internally points to something called a "zval", which can actually be used for multiple variables simultaneously, either because they have the same value (PHP implements something called "copy-on-write" so that, When you pass a parameter to a function you are creating a, Global variables are generally considered a bad idea. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing. How do you know which one was executed first? Can a lightweight cyclist climb better than the heavier one by producing less power? How to set properties of an object dynamically, from a variable name? Unserializes data as returned by the standard PHP serialize() function. PHP Arrays - W3Schools This brings actual behavior closer to expected, and means that in this case $obj->$field[0] will produce the expected result. $this is the value of the calling object. PHP - json_decode () The json_decode () function is used to decode a JSON object into a PHP object or an associative array. How does this compare to other highly-active people in recorded history? ways: 1. And what is a Turbosupercharger? This is exactly what you want - its a ready to use "copy and drop in" function that echo the name of a given var: HINT In addition, OP didn't specifically ask, because I gather he was isolating his problem for the question, however, I gather OP wants the value output as well. for id = 1. - markus Nov 18, 2012 at 13:32 1 Though I think using an array instead of the object would be a better solution. Asking for help, clarification, or responding to other answers. Can a judge or prosecutor be compelled to testify in a criminal trial in which they officiated? It is generally a bad idea to enumerate properties like that. What is the most efficient way to deep clone an object in JavaScript? I don't like hacks like this, but as long as PHP doesn't have an alternative, this is what has to be done: With regard to getting the class name from a namespaced class name, then using basename() seems to do the trick quite nicely. It works, for the limited uses below. 594), Stack Overflow at WeAreDevelopers World Congress in Berlin, Temporary policy: Generative AI (e.g., ChatGPT) is banned, Preview of Search and Question-Asking Powered by GenAI, Get the name of the method that called another method. Returns true if value is an object, How can I change elements in a matrix to a combination of other elements? Schopenhauer and the 'ability to make decisions' as a metric for free will. Find centralized, trusted content and collaborate around the technologies you use most. We can create multiple objects from a class. Would fixed-wing aircraft still exist if helicopters had been invented (and flown) before them? Sci fi story where a woman demonstrating a knife with a safety feature cuts herself when the safety is turned off. A class is defined by using the class Let me give you a more generic approach, which, sadly, requires PHP 5. Without the where clause it would be like looking for a . What do multiple contact ratings on a relay represent? If he did, he wouldn't need a, This does not return the name of a variable as string, because. PHP - Variable Types | Tutorialspoint - Online Tutorials Library Can YouTube (e.g.) Note: Member functions cannot be transferred using this approach. Is this even possible in PHP? The array solution works but is a little convoluted to type when it is needed. Used in different expressions on different lines it works. The json_decode () function returns an object by default. 'world'; public $var2 = <<<EOD hello world EOD; public $var3 = 1+2; // invalid property declarations: Ingenuity like this is why I smile every time I see people say "can't be done" or "not possible", which includes even Rasmus himself in this case. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Also, on average, how many times did you, New! Note: Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Why do we allow discontinuous conduction mode (DCM)? I know this is old and already answered but I was actually looking for this. just look at what you are actually doing. PHP Variable Variables. Any Ideas how to achieve this? Modified 8 years, 6 months ago. Connect and share knowledge within a single location that is structured and easy to search. A variable is a "named storage" for data. 594), Stack Overflow at WeAreDevelopers World Congress in Berlin, Temporary policy: Generative AI (e.g., ChatGPT) is banned, Preview of Search and Question-Asking Powered by GenAI. Connect and share knowledge within a single location that is structured and easy to search. Connect and share knowledge within a single location that is structured and easy to search. You might consider changing your approach and using a variable variable name? I've also tried using $template->${$field_name} and $template->$$field_name but so far no luck! Thanks for contributing an answer to Stack Overflow! In backtrace the class name you want is not always the last item in the array. And later referencing that property. What is Mathematica's equivalent to Maple's collect with distributed option? As pointed out elsewhere the name isn't portable across function boundaries. Integers are whole numbers, without a decimal point, like 4195. Many languages offer some way to do goto easily and that doesn't mean you should use it to avoid writing proper flow control. Unserialize this serialized data into instance of the final class using unserialize() method. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing. I worked on some code that used dynamically created object properties. Classes are the blueprints of objects. Example Class Car is defined, then Mercedes, BMW, Skoda are all objects of the Class Car. Markus, the "bullet" properties are strings of text containing miscellaneous information about an item. Obviously this will not always work, since different variables often have the same values, but it's the only way I can think of to do this. How can I get the name of the variable where in a instance of a class is present. Edit: get_defined_vars() doesn't seem to be working correctly, it returns 'var' because $var is used in the function itself. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. Beware if you're omitting the parameter on inherited classes. Is it unusual for a host country to inform a foreign politician about sensitive topics to be avoid in their speech? I ended up with that style of development. 6. Could the Lightning's overwing fuel tanks be safely jettisoned in flight? In PHP, Object Variable variables allow variables to be treated as objects. There is no predefined function in PHP that can output the name of a variable. color, weight, etc. When a class is defined, we can create many objects out of the class. ClassName::class: Since PHP 5.5, we can access to the fully qualified name of a class. 1 intro This is a new website I have made, feel free to have a look around 2 title About 2 heading Read all about it! As nice as this may seem, it IMO is not good advice. (with no additional restrictions), Can I board a train without a valid ticket if I have a Rail Travel Voucher. OP is looking to programmatically determine variable name. I modified the $pat line slightly to. Kudos to Sebastin and anyone else that may have contributed to this answer. Both double-quoted ("") and heredoc strings provide the ability to interpolate a variable's value into the string. Variable names are there to help programmers read their code. The Journey of an Electromagnetic Wave Exiting a Router. here i created one function that i wanted to find but i had never found :X, cleaned up peter's code use only one return statement, Human Language and Character Encoding Support. Does anyone with w(write) permission also have the r(read) permission? This parameter may be omitted when inside a class. Why is an arrow pointing through a glass of water only flipped vertically but not horizontally? I'm not advocating to loop over unknown names. What is the latent heat of melting for a everyday soda lime glass. As noted in bug #30934 (which is not actually a bug but a consequence of a design decision), the "self" keyword is bound at compile time. This "enclose with braces" trick is useful in PHP whenever there is ambiguity due to variable variables. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. I suppose it could be expanded to work with multiple arguments but, like others have said, if you could explain the situation better, another solution would probably work better. To get class name without the Namespace you can use easily this trick : It is possible to write a completely self-contained Singleton base class in PHP 5.3 using the new get_called_class function. So I'll change the above code to use $GLOBALS. How to display Latin Modern Math font correctly in Mathematica? Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand ; Advertising Reach developers & technologists worldwide; Labs The future of collective knowledge sharing; About the company To learn more, see our tips on writing great answers. Which generations of PowerPC did Windows NT 4 run on? I need to extract the object names as string like this: You have several way to print a a class name in php: get_class: Returns the name of the class of an object. This code is HORRIBLY incorrect. will now throw an, Prior to this version the default value for. Unlike other methods listed here, I chose not to prevent use of __construct() or __clone(). Has these Umbrian words been really found written in Umbrian epichoric alphabet? Algebraically why must a single square root be done on all terms rather than individually? I would never use this in production. What is your use-case? Continuous Variant of the Chinese Remainder Theorem. While using W3Schools, you agree to have read and accepted our. Cool but you have to know the name of the variable to use it. PHP JSON complete tutorial (with examples) - Alex Web Develop Regardless of the fact that this is bad XML, you should not be mapping those fields to class properties but rather use Iterators or directly with parts of the SimpleXML Object. The data looks as follows: What I need to do with that data is set properties of a $template object according to the field column and set said values to what's in the content column; e.g. You can use is_object($this) to detect if the function is being called via instance or procedure. PHP treats newlines as whitespace in the manner of a free-form language, and statements are terminated by a semicolon. Stack Overflow. Reference - What does this error mean in PHP? In some cases, the names of the JSON variables cannot be used as names for PHP variables. Is it superfluous to place a snubber in parallel with a diode by default? In these cases, you can access the variable inside the decoded object using this syntax: Return Values this. PHP OOP Class Constants - W3Schools Example #2 Using get_class() in superclass, Example #3 Using get_class() with namespaced classes, Returns the name of the class of an object. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. These methods include the _toString() function and the serialize() function. This is a similar case in my view. Create your own server using Python, PHP, React.js, Node.js, Java, C#, etc. We get: $this->getUser()->hasCredential("delete"). Variables - The Modern JavaScript Tutorial Given the GLOBALS can be large that can be quite a performance improvement. Good it works, I probably never use it but at least you answered the question. You can use dot notation to access both Data Layer variable keys which have a dot in their name (e.g. A lot of the examples here assume that the variable you want to "reflect" can be found in. PHP Variables - W3Schools Most languages I've come across have some way of doing this, usually simple. an E_WARNING level error was raised. They come from using SimpleXMLEement to process an XML file that has code like:
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