What is the purpose of parameters in PHP functions?
A). To store values within the function
B). To define the return type of the function
C). To specify values that are passed to the function when it is called
D). To specify the visibility of the function
What will be the output of the following PHP code?<?php
function uppercase($str) {
return strtoupper($str);
}
echo uppercase('hello');
?>
A). HELLO
B). hello
C). Uppercase
D). Undefined function: uppercase
Which PHP feature allows defining functions without specifying their names?
A). Anonymous functions
B). Dynamic functions
C). Global functions
D). Static functions
What keyword is used to define a function in PHP?
A). define
B). function
C). declare
D). method
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
Which PHP feature allows defining functions within other functions?
A). Nested functions
B). Inner functions
C). Enclosed functions
D). Internal functions
What is the significance of passing functions as arguments in PHP?
A). It allows functions to be called multiple times
B). It simplifies the function definition process
C). It enables dynamic function invocation and behavior
D). It prevents code duplication
What will be the output of the following PHP code?<?php
$greet = function($name) {
return 'Hello, $name!';
};
echo $greet('John');
?>
A). Hello, John!
B). Hello, $name!
C). function($name) {
return 'Hello, $name!';
}
D). John
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 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!'; }