Allowed memory size of 268435456 bytes exhausted (tried to allocate 9837880 bytes)" code example

Example 1: Fatal error: Allowed memory size of 536870912 bytes exhausted (tried to allocate 119541600 bytes) in C:\xampp\htdocs\backup-vice.php on line 67

<?php 
ini_set('memory_limit', '1024M'); // or you could use 1G

?>

Example 2: Fatal error: Allowed memory size of 1610612736 bytes exhausted (tried to allocate 32 bytes) in

;memory_limit=512M