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Comparison of blocking and non-blocking methods of writing files using flock in PHP
Comparison of blocking and non-blocking methods of writing files using flock in PHP
This article mainly shares with you a comparison of PHP's blocking and non-blocking methods of writing files using flock. The editor thinks it is quite good, so I will share it with you now and give it as a reference for everyone. Let’s follow the editor to take a look, I hope it can help everyone.
Blocking writing code: (All programs will wait for the last program execution to end before executing, and will time out in 30 seconds)
<?php
$file = fopen("test.txt","w+");
$t1 = microtime(TRUE);
if (flock($file,LOCK_EX))
{
sleep(10);
fwrite($file,"Write something");
flock($file,LOCK_UN);
echo "Ok locking file!";
}
else
{
echo "Error locking file!";
}
fclose($file);
$t2 = microtime(TRUE);
echo sprintf("%.6f",($t2-$t1));Non-blocking writing code: (As long as the file is If occupied, Error locking file is displayed!)
<?php
$file = fopen("test.txt","a+");
$t1 = microtime(TRUE);
if (flock($file,LOCK_EX|LOCK_NB))
{
sleep(10);
fwrite($file,"Write something");
flock($file,LOCK_UN);
echo "Ok locking file!";
}
else
{
echo "Error locking file!";
}
fclose($file);
$t2 = microtime(TRUE);
echo sprintf("%.6f",($t2-$t1));Related recommendations:
In-depth understanding of coroutines and blocking in php
Detailed explanation of classic and non-blocking
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