在PHP中超时一个函数 [英] Timeout a function in PHP
问题描述
<?php
foreach($ arr as $ key => $ value){
some_function($ key,$ value); //这个函数使用SSH和SFTP的东西
}
?>
$ arr有15个元素,some_function()有时可能需要1分钟以上。事实上,一旦它被绞死了5分钟。
有没有办法让超时的函数调用和下一个元素在$ arr?
谢谢!!
这取决于您的实施。 PHP中的99%的功能是阻塞的。在当前功能完成之前,意义处理将不会继续。然而,如果函数包含一个循环,你可以添加自己的代码,以满足某些条件后中断循环。
类似这样:
$ b $
foreach($ array as $ value){
perform_task($ value);
函数perform_task($ value){
$ start_time = time(); ((time() - $ start_time)> 300){
return false; $($)
$ b while(true){
if //超时,函数耗时超过300秒
}
//其他处理
code pre >
另一个中断处理的例子是不可能的:
$ $ $ $ $ $ foreach $ array作为$ value){
perform_task($ value);
函数perform_task($ value){
// preg_replace是一个阻塞函数
//在一定数量的时间。
返回preg_replace('/ pattern /','replace',$ value);
}
Is there a way to timeout a function? I have 10 minutes to perform a job. The job includes a for loop, here is an example:
<?php
foreach($arr as $key => $value){
some_function($key, $value); //This function does SSH and SFTP stuff
}
?>
$arr has 15 elements and some_function() sometimes may take more than 1 minutes. In fact once it got hanged for 5 minutes.
Is there a way I can timeout the function call and move on with next element in $arr?
Thank you!!
It depends on your implementation. 99% of the functions in PHP are blocking. Meaning processing will not continue until the current function has completed. However, if the function contains a loop you can add in your own code to interrupt the loop after a certain condition has been met.
Something like this:
foreach ($array as $value) {
perform_task($value);
}
function perform_task($value) {
$start_time = time();
while(true) {
if ((time() - $start_time) > 300) {
return false; // timeout, function took longer than 300 seconds
}
// Other processing
}
}
Another example where interrupting the processing IS NOT possible:
foreach ($array as $value) {
perform_task($value);
}
function perform_task($value) {
// preg_replace is a blocking function
// There's no way to break out of it after a certain amount of time.
return preg_replace('/pattern/', 'replace', $value);
}
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