The parallel\Future class
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A Future represents the return value or uncaught exception from a task, and exposes an API for cancellation.
Futures
A Future represents the return value or uncaught exception from a task, and exposes an API for cancellation.
Example showing Future as return value
php
<?php
$runtime = new \parallel\Runtime;
$future = $runtime->run(function(){
return "World";
});
printf("Hello %s\n", $future->value());
?>The above example will output something similar to:
output
Hello WorldThe behaviour of a future also allows it to be used as a simple synchronization point even where the task does not return a value explicitly.
Example showing Future as synchronization point
php
<?php
$runtime = new \parallel\Runtime;
$future = $runtime->run(function(){
echo "in child ";
for ($i = 0; $i < 500; $i++) {
if ($i % 10 == 0) {
echo ".";
}
}
echo " leaving child";
});
$future->value();
echo "\nparent continues\n";
?>The above example will output something similar to:
output
in child .................................................. leaving child
parent continuesClass synopsis
class parallel\Future { }
Future