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
What keyword is used to define a function in PHP?
A). define
B). function
C). declare
D). method
What is the significance of default parameter values in PHP functions?
A). Default parameter values are required for all parameters in a function
B). Default parameter values allow specifying multiple default values for a parameter
C). Default parameter values allow parameters to be optional
D). Default parameter values allow specifying the data type of parameters
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, $name!';
}
D). John
Which PHP keyword is used to check if a function exists before calling it?
A). check_function()
B). function_exists()
C). function_check()
D). exists_function()
Which PHP keyword is used to declare a variable-length argument list in a function?
A). vararg
B). args
C). params
D). ...$args
Which PHP feature allows defining functions within other functions?
A). Nested functions
B). Inner functions
C). Enclosed functions
D). Internal functions
Which PHP feature allows defining functions without specifying their names?
A). Anonymous functions
B). Dynamic functions
C). Global functions
D). Static functions
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 []
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!'; }