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PHP server scripts are surrounded by delimiters, which?

...

<&> ...

script ... /script

... ?>

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Suppose that $name contains a last name followed by a comma anda space, followed by a first name. Then, you can store the firstand last names in variables with code like this:

$i = strpos($name, ', ');

$first_name = substr($name, 0, $i);

$last_name = substr($name, $i+1);

$i = strpos($name, ', ');

$first_name = substr($name, 0, $i);

$last_name = substr($name, $i+2);

$i = strpos($name, ', ');

$last_name = substr($name, 0, $i);

$first_name = substr($name, $i+1);

$i = strpos($name, ', ');

$last_name = substr($name, 0, $i);

$first_name = substr($name, $i+2);

The print_r(), var_export(), and var_dump() functions are usedwith __________ to display the index and value of each element.

variables

functions

arrays

primitives

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You use the __________ function to find the total numberof elements in an array.

sum()

counta()

count()

suma()

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A(n) __________ operator requires a single operand either beforeor after the operator.

unary

single

binary

ternary