Are PHP variables dynamic?
PHP allows us to use dynamic variable. We can name a variable with the value stored in another variable. That is, one variable contains the name of another variable.
What is dynamic variable JavaScript?
Dynamic variables are variabiles that are not set with a specific name in script, their name is dynamically, it can be formed with a string-value from other source (for example from a form field, or other variabile).
How do I pass variables and data from JavaScript to PHP?
The way to pass a JavaScript variable to PHP is through a request. This type of URL is only visible if we use the GET action, the POST action hides the information in the URL. Server Side(PHP): On the server side PHP page, we request for the data submitted by the form and display the result. $result = $_GET [ ‘data’ ];
What is dynamic function PHP?
In PHP you can have dynamic function calls, that is during execution of your PHP script you can trigger a function call based on certain inputs or conditions which you don’t know before hand. The name of the function is in string format. Parameters to your function can be passed through the parameter arguments.
How does PHP allow variable names to be specified at run time explain with an example?
A variable starts with the $ sign, followed by the name of the variable. A variable name must start with a letter or the underscore character. A variable name cannot start with a number. A variable name can only contain alpha-numeric characters and underscores (A-z, 0-9, and _ )
How can use dynamic variable name in JavaScript?
In JavaScript, dynamic variable names can be achieved by using 2 methods/ways given below.
- eval(): The eval() function evaluates JavaScript code represented as a string in the parameter. A string is passed as a parameter to eval().
- Window object: JavaScript always has a global object defined.
What is a dynamic variable?
In programming, a dynamic variable is a variable whose address is determined when the program is run. In contrast, a static variable has memory reserved for it at compilation time.
Is it possible to use dynamic variables in JavaScript?
Dynamic variables are rarely used in JavaScript. But in some cases they are useful. Unlike PHP, there is no special implementation of dynamic variable names in JavaScript. But similar results can be achieved by using some other methods.
What is the difference between PHP variable and JS variable?
The PHP variable needs to be defined before the JS one. 2. The JS variable needs to be defined before you actually use it anywhere. This seems obvious, but if you forget this fact and try to put this declaration into the footer of your site and then use it in the content, you’ll find it doesn’t work!
How do I declare a JavaScript variable in PHP?
You just define the PHP variable first, then echo it into a basic JS variable declaration statement. I know there are lots of ways to define a JavaScript variable, but this is the one I find works in the most circumstances.
Why can’t PHP-Echo string variables into HTML directly?
The values of these PHP string variables have to be transferred into javascript variables for further processing by javascript (or exposing these values in HTML directly) it is not safe to PHP-echo such variables into HTML (javascript) directly, because some of characters possily contained in them cause malfunction of the HTML.