Tick
Ticks are events that occur for a group of statements, executed by PHP.
Ticks are started within the declare block.
Ticks are deprecated since PHP 5.3. They might entirely disappear in version 9.0.
<?php
declare(ticks=1);
// A function called on each tick event
function tick_handler()
{
echo 'tick_handler() called'.PHP_EOL;
}
register_tick_function('tick_handler'); // causes a tick event
$a = 1; // causes a tick event
if ($a > 0) {
$a += 2; // causes a tick event
print($a); // causes a tick event
}
?>