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<?php
// Starting clock time in seconds
$start_time = microtime(true);
$a=1;
// Start loop
for($i = 1; $i <=1000; $i++)
{
$a++;
}
// End clock time in seconds
$end_time = microtime(true);
// Calculate script execution time
$execution_time = ($end_time - $start_time);
echo " Execution time of script = ".$execution_time." sec";
?>