《PHP實(shí)戰(zhàn)：分享PHP-pcntl 實(shí)現(xiàn)多進(jìn)程代碼》要點(diǎn)：
本文介紹了PHP實(shí)戰(zhàn)：分享PHP-pcntl 實(shí)現(xiàn)多進(jìn)程代碼，希望對(duì)您有用。如果有疑問(wèn)，可以聯(lián)系我們。
PHP使用PCNTL系列的函數(shù)也能做到多進(jìn)程處理一個(gè)事務(wù).比如我需要從數(shù)據(jù)庫(kù)中獲取80w條的數(shù)據(jù),再做一系列后續(xù)的處理,這個(gè)時(shí)候,用單進(jìn)程?你可以等到明年今天了...所以應(yīng)該使用pcntl函數(shù)了.PHP實(shí)戰(zhàn)
下面我們來(lái)看個(gè)實(shí)例PHP實(shí)戰(zhàn)
代碼
PHP實(shí)戰(zhàn)
<?php
$arChildId = array();
for($i = 0; $i < 10; $i++)
{
$iPid = pcntl_fork();
if($iPid == -1)
{
die('can\'t be forked.');
}
if($iPid)
{
# 主進(jìn)程邏輯
$arChildId[] = $iPid;
}
else
{
# 子進(jìn)程邏輯
$iPid = posix_getpid(); # 獲取子進(jìn)程的ID
$iSeconds = rand(5, 30);
echo '* Process '. $iPid. ' was created, and Executed, and Sleep '. $iSeconds. PHP_EOL;
excuteProcess($iPid, $iSeconds);
exit();
}
}
while(count($arChildId) > 0)
{
foreach($arChildId as $iKey=> $iPid)
{
$res = pcntl_waitpid($iPid, $status, WNOHANG);
if($res == -1 || $res > 0)
{
unset($arChildId[$iKey]);
echo '* Sub process: '. $iPid. ' exited with '. $status. PHP_EOL;
}
}
}
# 子進(jìn)程執(zhí)行的邏輯
function excuteProcess($iPid, $iSeconds)
{
file_put_contents('./log/'.$iPid.'.log', $iPid.PHP_EOL, FILE_APPEND);
sleep($iSeconds);
}
?>
運(yùn)行結(jié)果
PHP實(shí)戰(zhàn)
* Process 16163 was created, and Executed, and Sleep 11 * Process 16164 was created, and Executed, and Sleep 21 * Process 16165 was created, and Executed, and Sleep 24 * Process 16166 was created, and Executed, and Sleep 27 * Process 16167 was created, and Executed, and Sleep 8 * Process 16168 was created, and Executed, and Sleep 14 * Process 16169 was created, and Executed, and Sleep 14 * Process 16170 was created, and Executed, and Sleep 26 * Process 16171 was created, and Executed, and Sleep 20 * Process 16172 was created, and Executed, and Sleep 21 * Sub process: 16167 exited with 0 * Sub process: 16163 exited with 0 * Sub process: 16169 exited with 0 * Sub process: 16168 exited with 0 * Sub process: 16171 exited with 0 * Sub process: 16164 exited with 0 * Sub process: 16172 exited with 0 * Sub process: 16165 exited with 0 * Sub process: 16170 exited with 0 * Sub process: 16166 exited with 0
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