Question

Which of the following are valid function names? 1. function() 2. €() 3. .function() 4. $function()
A.Only 2
B.None of the mentioned
C.All of the mentioned
D.3 and 4

Answer 1

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ıllıllıllıllıllıllı[ Your Answer ]ıllıllıllıllıllıllı

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$\huge\boxed{\texttt{\fcolorbox{aqua}{grey}{B}}}$ ${\bf{\underline{Answer}}}$

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▂▃▅▇█▓▒░[ Hope It Helps You Dear ]░▒▓█▇▅▃▂

Answer 2

Answer:

• Except a) others are invalid names. According to the specified regular expression ([a-zA-Z_x7f-xff][a-zA-Z0-9_x7f-xff]*), a function name like this one is valid.

Explanation:

• Except a) others are invalid names. According to the specified regular expression ([a-zA-Z_x7f-xff][a-zA-Z0-9_x7f-xff]*), a function name like this one is valid.

A function may be defined using syntax such as the following:

Example #1 Pseudo code to demonstrate function uses

<?php

function foo($arg_1, $arg_2, /* ..., */ $arg_n)

{

   echo "Example function.\n";

   return $retval;

}

?>

• Any valid PHP code may appear inside a function, even other functions and class definitions.
• Function names follow the same rules as other labels in PHP. A valid function name starts with a letter or underscore, followed by any number of letters, numbers, or underscores. As a regular expression, it would be expressed thus: ^[a-zA-Z_\x80-\xff][a-zA-Z0-9_\x80-\xff]*$.
• Functions need not be defined before they are referenced, except when a function is conditionally defined as shown in the two examples below.
• When a function is defined in a conditional manner such as the two examples shown. Its definition must be processed prior to being called.

More information function call:

https://brainly.in/question/36822146?referrer=searchResults

https://brainly.in/question/11463829?referrer=searchResults`