Graphic Maniacs » PHP

Getting a list of WordPress hook actions

Alex — Wed, 18 Jan 2012 13:08:40 +0000

Sometimes content is outputted somewhere where I don’t need (when I run do_action), and I can’t really see what action does that. So to get the list of WordPress actions attached to a hook, use this kind of code:

global $wp_filter;
var_dump($wp_filter['comment_form']);

You will get then something like this:

array(1) {
  [10]=>
  array(2) {
    ["wp_comment_form_unfiltered_html_nonce"]=>
    array(2) {
      ["function"]=>
      string(37) "wp_comment_form_unfiltered_html_nonce"
      ["accepted_args"]=>
      int(1)
    }
    ["akismet_add_comment_nonce"]=>
    array(2) {
      ["function"]=>
      string(25) "akismet_add_comment_nonce"
      ["accepted_args"]=>
      int(1)
    }
  }
}

Pretty cool, now we know what produces all that output.

Issue with Flash uploader and Suhosin PHP patch

Alex — Wed, 11 Jan 2012 10:36:54 +0000

This is a very simply situation: we use multiple files Flash uploader to display progress, and for other extended functionality when uploading files. But this issue was killing me. After installing Suhosin patch, the session was breaking after any file upload.

This was made because Suhosin checks the User-Agent also, and Flash has a different user agent from the browser. Even providing a session id to Flash won’t solve the issue because Suhosin checks the user agents when session_id/session_start is called.

To solve this issue, simply disable user agent encrypting, but leave the IP address encrypting in php.ini:

suhosin.session.encrypt = On
suhosin.session.cryptraddr = On
suhosin.session.cryptua = Off

This page can be found by searching for:

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How to remove “on behalf of” in PHP mail for Outlook 2007 and 2010

Alex — Wed, 14 Dec 2011 08:00:16 +0000

Anyone noticed that stupid “admin@domain.com; on behalf of; noreply@domain.com” bug in subject when you received email with Outlook 2007 and 2010?

Well, the fix is pretty simple. While we were setting the From: header, now we need to set the Sender header too. So it looks like:

$header='';
$header.="Sender: $from\r\n";
$header.="From: $from\r\n";
$header.="MIME-Version: 1.0\r\n";
$header.="Content-Type: text/html; charset=utf-8\r\n";
$header.="Content-Transfer-Encoding: 8bit\r\n";
 
mail($to, '=?UTF-8?B?'.base64_encode($subject).'?=', $text, $header);

And that’s it. It took me a while googling for the issue to find it, but hopefully it saves your day!

This page can be found by searching for:

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Check if ZIP file is valid with PHP

Alex — Fri, 18 Nov 2011 15:53:16 +0000

Recently, i tried to check if ZIP file is valid by checking its MIME type. But server to server, it varies and sometimes even shows up like application/unknown. This is bad, so let’s just rely on native PHP functions:

function zipIsValid($path) {
  $zip = zip_open($path);
  if (is_resource($zip)) {
    // it's ok
    zip_close($zip); // always close handle if you were just checking
    return true;
  } else {
    return false;
  }
}
 
if (zipIsValid('myzip.zip')) {
  // do stuff
  // ...
}

zip_open will return a resource in case of successful opening, otherwise it will return an integer with error code, so checking for if ($zip) won’t be proper.

This page can be found by searching for:

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Facebook-like time ago with PHP

Alex — Fri, 11 Nov 2011 10:34:24 +0000

Ever wanted to have your date display like Facebook has? “3 minutes ago” instead of “09:12:10″?

Well, here’s a very simple code with PHP:

function ago($time)
{
   $periods = array("second", "minute", "hour", "day", "week", "month", "year", "decade");
   $lengths = array("60","60","24","7","4.35","12","10");
 
   $now = time();
 
   $difference = $now - $time;
   if ($difference > 0)
      $tense = 'ago';
   else
      $tense = 'in future';
 
   for($j = 0; $difference >= $lengths[$j] && $j < count($lengths)-1; $j++) {
       $difference /= $lengths[$j];
   }
 
   $difference = round($difference);
 
   if($difference != 1) {
       $periods[$j].= "s";
   }
 
   return "$difference $periods[$j] $tense ";
}
 
echo "I was here ".ago(time()-3600);
// will output "I was here 1 hour ago"

Another way is to use a function from andypsv

function time_ago($tm,$rcs = 0) {
    $cur_tm = time(); $dif = $cur_tm-$tm;
    $pds = array('second','minute','hour','day','week','month','year','decade');
    $lngh = array(1,60,3600,86400,604800,2630880,31570560,315705600);
    for($v = sizeof($lngh)-1; ($v >= 0)&&(($no = $dif/$lngh[$v])<=1); $v--); if($v < 0) $v = 0; $_tm = $cur_tm-($dif%$lngh[$v]);
 
    $no = floor($no); if($no <> 1) $pds[$v] .='s'; $x=sprintf("%d %s ",$no,$pds[$v]);
    if(($rcs == 1)&&($v >= 1)&&(($cur_tm-$_tm) > 0)) $x .= time_ago($_tm);
    return $x;
}

Hope you found it handy, I did.

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