函数2020.04.05发生异常，导致程序异常退出php进程
function down($filename){
$handle = fopen($filename, "r");
$contents = "";
do {
$data = fread($handle, 8192);
if (strlen($data) == 0) {
break;
}
$contents .= $data;
} while(true);
fclose($handle);
return $contents;
}
状态查询：nginx 自身有个日志问题
/home/wwwlogs/nginx_error.log
2020/04/02 00:59:45 [alert] 17320#0: *3376022 http request count is zero while closing request, client: 50.70.90.27, server: 0.0.0.0:443
读取的时候
这个错误因为读取不到文件，发生错误，程序异常然后exit了。
无效的办法1.改动的异常捕获
try{
$handle = fopen($filename, "r");
}catch(Exception $e){
print $e->getMessage();
}
失败，根本没有异常弹出
Warning: fopen(https://java-er.com/no.php): failed to open stream: php_network_getaddresses: getaddrinfo failed: nodename nor servname provided, or not known in /www/autotest.php on line 33
Warning: fread() expects parameter 1 to be resource, boolean given in /www/autotest.php on line 39
Warning: fclose() expects parameter 1 to be resource, boolean given in /www/autotest.php on line 45
无效的办法2. 强行报错测试
register_shutdown_function("errorCheck");
function errorCheck(){
$error=error_get_last();
print_r($error);
}
function test(Array $a){
echo 1;
}
//强行报错
test(123);
发现可以报错
合并到代码里
用到了这里，不好用。说明这个强行报错的办法，只能监测到系统级别错误，无法获取warning
3. 增加全局报错，依然无效
error_reporting(E_ALL);
换成 E_WARNING 也无效
4. set_error_handler
//error handler function
function customError($errno, $errstr)
{
echo "Error: [$errno] $errstr";
}
//set error handler
set_error_handler("customError");
php autotest.php
2020-04-05 11:55:56
Error: [2] fopen(https://java-er.com/no.php): failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found
####Error: [2] fread() expects parameter 1 to be resource, boolean givenError: [2] fclose() expects parameter 1 to be resource, boolean given2020-04-05 11:55:59
Error: [2] fopen(https://java-er.com/no.php): failed to open stream: HTTP request failed! HTTP/1.1 404 Not Found
####Error: [2] fread() expects parameter 1 to be resource, boolean givenError: [2] fclose() expects parameter 1 to be resource, boolean given^C
set_error_handler 可以正确的打印，我想补获的错误，程序在下载一个不存在文件，或者出错的情况下。就可以监控了。
后记：set_error_handler感觉在触发底层线程，当我在customError里试图修改一个php的全局变量，无效。只好把warning的信息都写到一个文件里 wwww/log/err.log