Page 171 - Open Soource Technologies 304.indd

Unit 7: Multidimensional Arrays

echo “Entering $name (stack is now: “ . join(‘ -> ‘, $call_trace) . ‘)<br />’; Notes
}

function exit_function( ) {
echo ‘Exiting<br />’;

global $call_trace;
array_pop($call_trace); // we ignore array_pop( )’s return value

}

function first( ) {
enter_function(‘first’);
exit_function( );

}

function second( ) {
enter_function(‘second’);
first( );

exit_function( );
}

function third( ) {
enter_function(‘third’);
second( );

first( );
exit_function( );

}

first( );

third( );
Here’s the output from Example:

Entering first (stack is now: first)
Exiting
Entering third (stack is now: third)

LOVELY PROFESSIONAL UNIVERSITY 165