Get and Analysis Memory and Execution time in PHP.

index.php

<?php

$start_mem = memory_get_usage();
$start = hrtime(true);
$array = range(1, 100000);
$end = hrtime(true);
$end_mem = memory_get_usage();
$mem_usage = $end_mem - $start_mem;

// Calculate the execution time
$execution_time = ( $end - $start ) / 1000000;

echo $mem_usage . " Bytes or " . $mem_usage / 1000000 . " MB \n";
echo "Execution Time: " . $execution_time . " MS";