- array_push: documentation ( source)
- microtime: documentation ( source)
- ini_set: documentation ( source)
<?php
ini_set('memory_limit',-1);
$i=10000;
$c=[];
$time_c=microtime(true);
for($z=0;$z<$i;$z++){
array_push($c,...[0,1,2,3,4,5,6,7,8,9]); // $b[]=...[0,1,2,3,4,5,6,7,8,9];
}
$time_c=microtime(true)-$time_c;
print($time_c.' sec');