Tag: php

Cannot load modules/mod_fcgid.so into server: undefined symbol: ap_unixd_setup_child

Posted on by mario

I got the following error message after compiling apache against the latest OpenSSL version.
Cannot load modules/mod_fcgid.so into server: undefined symbol: ap_unixd_setup_child
It looks like a compiler error that happened, but it isn’t. In fact, there are two options why there is this error message appears.
One mod_unixd isn’t loaded or loaded after mod_fcgid. Two mod_fcgid can’t create a directory for the socket or the socket itself. aka file permissions.
That error message could be much better. It is misleading. This error does not happen on Windows. It comes from the old Unix philosophy: “Everything is a file”. This lead to a ton of code in the kernels. Even more, code exists for block devices in /dev. All that symlinks and magic directories. I wonder when “Everything is a file” will have exceptions everyone agrees on.

How to extract img src, title and alt from html using php

Posted on by mario

preg_match_all match the regexp in all the $html string and output everything as
an array in $result. “i” option is used to make it case insensitive

preg_match_all('/<img[^>]+>/i',$html, $result);

print_r($result);

Get the metadata

$img = array();
foreach( $result as $img_tag)
{
preg_match_all('/(alt|title|src)=("[^"]*")/i',$img_tag, $img[$img_tag]);
}

print_r($img);

Here you go.

PHP XML tag contains colon

Posted on by mario

With PHPs’ simple xml functions it is possible to read xml easily. However, that doesn’t work any longer when a tag contains a colon. That tag is simply ignored and can’t be accessed. Often in RSS feeds there is content:encoded.

There is a trick. Instead of using simplexml_load_file use

$feed = file_get_contents($url);
$feed = str_replace("<content:encoded>", "<contentEncoded>", $feed);
$feed = str_replace("</content:encoded>", "</contentEncoded>", $feed);
$xml = simplexml_load_string($feed);

have fun!

Wild card domain to localhost because development matters

Posted on by mario

I have an A record for *.local at my test domain to 127.0.0.1

For web development it is often required to have a domain name rather than a subfolder in localhost. A vhost for a (sub)domain is easy to set up on my local apache instllation. I can have even a free, valid SSL certificate for that vhost. Wait, what? How can I have a valid certificate for free for a local domain? I use Let’s encrypt with DNS chalange. Sure every time I have to update the certifacte I have to change a DNS txt record, but that is easy.

Another reason why I have a wild card record to 127.0.0.1 is that I can add as many vhosts for testing to apache and don’t have to add or change the DNS settings. Also I can use it on every computer as long as it can query the DNS server on the internet. I can even give my co worker my vhost config and it works without changes.

So *.local.apachehaus.de is free for development. But you can’t have a SSL certificate. If you want that, you can do the same trick with your domain.  Happy development.

Fun with windows subsystem for linux

Posted on by mario

After the install and the required reboot I was able to start bash. At first I was confused where to find the files from the home directory. It isn’t the one from windows itself.
Well I found it in AppData\Local\lxss . So each user has his / her own files.

Since I was able to find most stuff I wanted to know if I am able to compile httpd apache on it. I cloned https://github.com/jblond/debian_build_apache24.git and the build went smooth.
But apache didn’t start. Adding AcceptFilter http none and AcceptFilter https none helped. To get rid of the first error messages. But still apache wasn’t starting. Got the following error message.

[Tue Jan 24 22:31:33.590385 2017] [fcgid:emerg] [pid 1289:tid 140034843477824] (38)Function not implemented: mod_fcgid: Can't create shared memory for size 1200712 bytes

Okay, I disabled mod_fcgid and apache starts with /opt/apache2/bin/httpd -k start . Even running bash.exe ~ as Adminstrator did not solve to run fcgid.
I have to find out how to run mod_fcgid. I like to run PHP over fcgid.

PHP sort array by key

Posted on by mario

Sorting an array by Key.

<?php
/*
Array
(
    [0] => Array
        (
            [hashtag] => a7e87329b5eab8578f4f1098a152d6f4
            [title] => Flower
            [order] => 3
        )

    [1] => Array
        (
            [hashtag] => b24ce0cd392a5b0b8dedc66c25213594
            [title] => Free
            [order] => 2
        )

    [2] => Array
        (
            [hashtag] => e7d31fc0602fb2ede144d18cdffd816b
            [title] => Ready
            [order] => 1
        )
)
*/
function aasort (&$array, $key) {
	$sorter = array();
	$ret = array();
	reset($array);
	foreach ($array as $ii => $va) {
	    $sorter[$ii] = $va[$key];
	}
	asort($sorter);
	foreach ($sorter as $ii => $va) {
	    $ret[$ii] = $array[$ii];
	}
	$array = $ret;
}
aasort($your_array,"order");
?>

mod_fcgid is polluting my error log on windows

Posted on by mario

Well I really like mod_fcgid with PHP on my Apaches on Windows. But since every time a PHP process get it’s signal to die, mod_fcgid creates on windows an entry in the error log cause the graceful stop always fails.

There in a patch for that! I made a bug report (54597), but it didn’t go in the code yet.  If you wanna patch it yourself, here it is.

--- modules/fcgid/fcgid_pm_main.c	(revision 1448988)
+++ modules/fcgid/fcgid_pm_main.c	(working copy)
@@ -333,10 +333,17 @@ 
                                   current_node->proc_pool);
         }
         else {
+#ifndef WIN32
             ap_log_error(APLOG_MARK, APLOG_WARNING, 0, main_server,
                          "mod_fcgid: process %" APR_PID_T_FMT
                          " graceful kill fail, sending SIGKILL",
                          current_node->proc_id.pid);
+#else
+            ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, main_server,
+                         "mod_fcgid: process %" APR_PID_T_FMT
+                         " graceful kill fail, sending SIGKILL",
+                         current_node->proc_id.pid);
+#endif
             proc_kill_force(current_node, main_server);
         }
     }

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