Zend Studio IDE knowledge nuggets!

I recently realized a few things that I didn’t know about the Zend Studio IDE. As many know I have used the Zend Studio IDE for PHP development for some time. All along I have been using the templates built into the IDE, and never realized that they could be changed since I had no need. My coding standard for years has been the same as the default templates built into the Zend Studio. However, my new employer has a large percentage of coders using Vi who had a different standard in relation to white space than I did, and they were not open to changing their coding standard to meet my Zend Studio preference.

So I had a dilemma. How could I continue to produce speedy PHP using the IDE if I had to type out functions, classes, and “if” statements 100%? (I feel that I save a significant amount of time using the template auto complete shortcuts.) The alternative was to continually edit these constructs after allowing the code completion to insert them.

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Using bitmask permissions like Unix in PHP application

Have you ever wanted to give read/write/Delete type of permissions to users or other items within a PHP application?  Why not use Unix-style file permissions (read/write/execute for example)?  A PHP implementation can be used for any kind of permissions in scripts and applications.

Use powers of two (the reasoning behind this will become apparent when you see the decoding function) to define your scheme.  Here’s a sample permission scheme:

define('PERMISSION_DENIED', 0);
define('PERMISSION_READ', 1);
define('PERMISSION_ADD',  2);
define('PERMISSION_UPDATE', 4);
define('PERMISSION_DELETE', 8);

Now that your permissions scheme is set you can apply it as needed. Using user permissions as an example lets say you wanted to create a user that has permissions to read and delete a log file. Using the above definitions, you would set the user’s permission to “9”.

Properly decoding that permission and apply it to a user can be easily achieved using the following function:

/**
 * Correct the variables stored in array.
 * @param    integer    $mask Integer of the bit
 * @return    array
 */
function bitMask($mask = 0) {
    if(!is_numeric($mask)) {
        return array();
    }
    $return = array();
    while ($mask > 0) {
        for($i = 0, $n = 0; $i <= $mask; $i = 1 * pow(2, $n), $n++) {
            $end = $i;
        }
        $return[] = $end;
        $mask = $mask - $end;
    }
    sort($return);
    return $return;
}

What this function does is break down the permission ($mask – the bit mask) into its components that are powers of 2 and return them in an array. If you did a print_r() of the above functions return with our example of “9” you would get:

array(
    0 => 1, // READ
    1 => 8  // DELETE
);

Now that you have your array of permissions, you could use the “in_array” function to check if a user has permission to perform a requested action. Take a look at this sample code:

// ...
$_ARR_permission = bitMask(9);
// ...
if(in_array(PERMISSION_READ, $_ARR_permission)) {
    // [...]
}
else {
    echo 'Access denied.';
}

Now you have a simple bitmask permission to use in your apps.

Subversion force comments to be entered

wanted to force someone to put in comments when they did a commit. So, below you will find what I did to enforce that. (I am sure that there is a more graceful way to do it, but this is how I did it.

With a default install of Fedora Core 4, Apache 2, and Subversion you can follow my example and everything should work fine.

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Make Subversion send an email upon post-commit

ore than a week ago I wrote about getting Subversion running remotely. However, now that I have multiple people using it remotely I want to know when someone commits changes. I have come to find out that this is very simple to do using hooks. However, I did run into a little trouble configuring it. So here are my findings.

With a default install of Fedora Core 4, Apache 2, and Subversion you can follow my example and everything should work fine.

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