Windows/php pclose 和 popen 问题
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Windows/php pclose and popen issue
提问by Naftali aka Neal
Here is my code:
这是我的代码：
<?php
require_once 'dbconnect.php';
function execInBackground($cmd) {
if (substr(php_uname(), 0, 7) == "Windows"){
pclose(popen("start /B ". $cmd, "r"));
}
else {
exec($cmd . " > /dev/null &");
}
}
if(isset($_GET['date'])){
//CHECK LOCK
$checkLock = "Select IS_FREE_LOCK('overnight') as `lock`;";
$result = mysql_query($checkLock) or die(mysql_error());
while($information = mysql_fetch_array($result)){
if($information['lock'] == 0){
die('Overnight is already running, please try again later.');
}
}
execInBackground("php overnightQueries.php {$_GET['date']}");
//echo "<pre>".print_r($output2, true)."</pre>";
header('Refresh: 3; url=index.php');
die('running queries...');
}
else {
die('PLEASE SET DATE');
}
?>
I am using a windows machine.
我正在使用 Windows 机器。
I get the following warnings:
我收到以下警告：
Warning: popen(start /B php overnightQueries.php 2011_08_12,r): No error in C:\inetpub\GTSA\runOvernight.php on line 5
警告：popen(start /B php nightQueries.php 2011_08_12,r)：第 5 行 C:\inetpub\GTSA\runOvernight.php 中没有错误
AND:
和：
Warning: pclose() expects parameter 1 to be resource, boolean given in C:\inetpub\GTSA\runOvernight.php on line 5
警告：pclose() 期望参数 1 是资源，布尔值在第 5 行 C:\inetpub\GTSA\runOvernight.php 中给出
回答by Marc B
$handle = popen("start /B ". $cmd, "r");
if ($handle === FALSE) {
die("Unable to execute $cmd");
}
pclose($handle);
popen returns false if there was a problem, which you blindly pass to pclose, hence the second error.
如果出现问题，则 popen 返回 false，您盲目地将其传递给 pclose，因此出现第二个错误。
As for the first error, check that PHP is in your environment's path - you may need to specify an absolute path to php.exe.
对于第一个错误，请检查 PHP 是否在您的环境路径中 - 您可能需要指定 php.exe 的绝对路径。
