<?php
 
function report_memory($string = '') {
	$mem = (memory_get_usage()/1000);
	echo "$string: {$mem}kb\n";
	return $mem;
}
 
$start = report_memory('Start of stript');
echo "\n";
 
for($i = 10000; $i > 0; $i--) {
	$var = "filler_$i";
	$$var = 'banana';
}
 
 
$diff = ($array_size = report_memory('After banana')) - $start;
echo "Fill Size: {$diff}kb\n\n";
 
$vars = get_defined_vars();
 
$grew = ($first_get = report_memory('After get_defined_vars()')) - $array_size;
echo "Growth from get_defined_vars(): {$grew}kb\n\n";
 
$vars = get_defined_vars();
 
$grew = report_memory('One more, for fun') - $first_get;
echo "Second Get grew: {$grew}kb\n";
 
unset($vars);
 
report_memory('After unset()');
 
echo "\nEXTRA\n";
 
// direct pass to a conditional
$test = (array_key_exists('filler_100000',get_defined_vars()) && is_null($filler_100000));
 
report_memory('After Conditional Inline');
 
// direct pass to function
$test = count(get_defined_vars());
 
report_memory('After Direct Pass');
 
function test() {
	$all = get_defined_vars();
	return !empty($all);
}
 
// In Fucntion
$test = test();
 
report_memory('Use in Function');

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