How do you call a php function as a variable?
PHP supports the concept of variable functions. This means that if a variable name has parentheses appended to it, PHP will look for a function with the same name as whatever the variable evaluates to, and will attempt to execute it. Among other things, this can be used to implement callbacks, function tables, and so forth. Show Variable functions won't work with language constructs such as echo, print, unset(), isset(), empty(), include, require and the like. Utilize wrapper functions to make use of any of these constructs as variable functions. Example #1 Variable function example
bar($arg = '') Object methods can also be called with the variable functions syntax. Example #2 Variable method example
Bar() When calling static methods, the function call is stronger than the static property operator: Example #3 Variable method example with static properties
Foo::$variable; // This prints 'static property'. It does need a $variable in this scope. Example #4 Complex callables
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What is a variable function in PHP?Variable functions ¶
This means that if a variable name has parentheses appended to it, PHP will look for a function with the same name as whatever the variable evaluates to, and will attempt to execute it. Among other things, this can be used to implement callbacks, function tables, and so forth.
What is $_ in PHP?So $_ is just an arbitrary variable. There's really no difference between using $_ and $value , except that $_ is just a conventional way to indicate a value that is not actually used inside the loop.
How do you call a method with a variable name?You could try something like: Method m = obj. getClass(). getMethod("methodName" + MyVar); m.
How do you define a function and call it in PHP?Creating and Invoking Functions
The declaration of a user-defined function start with the word function , followed by the name of the function you want to create followed by parentheses i.e. () and finally place your function's code between curly brackets {} .
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