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php中popen之后一直等待脚本执行完毕才向下执行,如何解决?

WBOY
WBOYOriginal
2016-06-06 20:07:361681browse

我在PHP中,使用了pclose(popen())之后,一直等待popen运行的脚本运行完成才继续向下执行。

//test.php
pclose(popen('php '.__DIR__.'/index.php','r'));
$fp = fopen('product.txt', 'cb');
if(flock($fp, LOCK_EX | LOCK_NB)){
    echo "ok
"; }else{ echo "no
"; } fclose($fp);

//index.php
sleep(10);
set_time_limit(0);
$fp = fopen('product.txt', 'cb');
flock($fp, LOCK_EX | LOCK_NB);
for($i = 10 ; $i ;$i--){
    fwrite($fp,$i."\n");
    sleep(6);
}
fclose($fp);

在test.php中第2行代码一直等到index.php执行完毕才开始运行,请问这是为什么

回复内容:

我在PHP中,使用了pclose(popen())之后,一直等待popen运行的脚本运行完成才继续向下执行。

//test.php
pclose(popen('php '.__DIR__.'/index.php','r'));
$fp = fopen('product.txt', 'cb');
if(flock($fp, LOCK_EX | LOCK_NB)){
    echo "ok
"; }else{ echo "no
"; } fclose($fp);

//index.php
sleep(10);
set_time_limit(0);
$fp = fopen('product.txt', 'cb');
flock($fp, LOCK_EX | LOCK_NB);
for($i = 10 ; $i ;$i--){
    fwrite($fp,$i."\n");
    sleep(6);
}
fclose($fp);

在test.php中第2行代码一直等到index.php执行完毕才开始运行,请问这是为什么

pclose(popen('nohup ' . $cmd . ' & 2>&1', 'r'));

pclose(popen('php /path/to/task.php &', 'r')); 其中&表示放入后台执行脚本task.php.
另外注意,if(flock($fp,LOCK_EX)) 会阻塞到获取排它锁.

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