Which PHP keyword is used to check if a function exists before calling it?
A). check_function()
B). function_exists()
C). function_check()
D). exists_function()
What is the syntax for calling a function in PHP?
A). callFunction()
B). function callFunction()
C). callFunction
D). callFunction;
How do you define parameters in a PHP function?
A). Parameters are defined within parentheses after the function name
B). Parameters are defined using the keyword 'param'
C). Parameters are defined using curly braces {}
D). Parameters are defined using square brackets []
Which of the following statements is true about function names in PHP?
A). Function names are case-sensitive
B). Function names must start with a dollar sign ($)
C). Function names cannot contain numbers
D). Function names can contain spaces
What will be the output of the following PHP code?<?php
function add($a, $b) {
return $a + $b;
}
$result = add(5, 3);
echo $result;
?>
A). 8
B). add(5, 3)
C). function add($a, $b) {
return $a + $b;
}
D). $a + $b
Which of the following statements about return types in PHP functions is true?
A). PHP functions must always have a return type
B). PHP functions can have a return type specified using the 'returns' keyword
C). PHP functions can have a return type specified using the 'return' keyword
D). PHP functions can have a return type declared using type declarations
What is the output of the following PHP code?<?php
function greet() {
echo 'Hello, World!';
}
if (function_exists('greet')) {
greet();
} else {
echo 'Function does not exist';
}
?>
A). Hello, World!
B). Function does not exist
C). Undefined function: greet
D). Function greet() { echo 'Hello, World!'; }
Which PHP feature allows defining functions without specifying their names?
A). Anonymous functions
B). Dynamic functions
C). Global functions
D). Static functions
What is the purpose of the return statement in PHP functions?
A). To terminate the function execution
B). To output a value from the function and terminate its execution
C). To define the function name
D). To declare a variable within the function
Which PHP keyword is used to declare a variable-length argument list in a function?
A). vararg
B). args
C). params
D). ...$args