- memory_get_peak_usage: documentation ( source)
- array_keys: documentation ( source)
- array_fill: documentation ( source)
- range: documentation ( source)
- printf: documentation ( source)
<?php
$array = array_fill(0, 100000, true);
function is_indexed_foreach($array) {
$n = 0;
foreach ($array as $key => $_) {
if ($key !== $n++) {
return false;
}
}
return true;
}
function is_indexed_range($array) {
return array_keys($array) === range(0, count($array) - 1);
}
printf("%.2f mb\n", memory_get_peak_usage() / 1024 / 1024);
is_indexed_foreach($array);
printf("%.2f mb\n", memory_get_peak_usage() / 1024 / 1024);
is_indexed_range($array);
printf("%.2f mb\n", memory_get_peak_usage() / 1024 / 1024);