Given the following PHP function: function doSomething(?string $s) { // … } Which of the following values for the $s parameter do NOT yield a type error when calling the doSomething() function? A. ‘null’ B. null C. " D. All…
What is a difference between the ?? operator and the ?: operator? A. The ?? operator combines the ternary operator with isset() B. The ?: operator combines the ternary operator with isset() C. The ?: operator is only supported by…
What is the output of the following code? A. 22333 B. 33222 C. 33322 D. 22233
Which of the following will set a 10 seconds read timeout for a stream? A. ini_set(“default_socket_timeout", 10); B. stream_read_timeout($stream, 10); C. Specify the timeout as the 5th parameter to the fsockopen() function used to open a stream D. stream_set_timeout($stream, 10);…
Consider the following table data and PHP code. What is the outcome? Table data (table name “users" with primary key “id"): PHP code (assume the PDO connection is correctly established): A. the database will return no rows. B. The value…
You work for a shared hosting provider, and your supervisor asks you do disable user scripts to dynamically load PHP extensions using the d1() function. How can you do this? (Choose two.) A. Set enable_d1 to off in the server’s…
What function can reverse the order of values in an array so that keys are preserved? A. array_flip() B. array_reverse() C. rsort() D. krsort() E. array_multisort()
What exception type will catch the error raised by the expression 2 / 0? A. LogicException B. RangeException C. DivisionByZeroError D. ArithmeticError
What can prevent PHP from being able to open a file on the hard drive? (Choose two.) A. File system permissions B. File is outside of open_basedir C. File is inside the /tmp directory D. PHP is running in CGI…
Which of the following are valid code snippets? (Choose three.) A. function 4You(){} B. function_4You(){} C. function object(){} D. $1 = “Hello"; E. $_1 = "Hello World";